/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/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:21:15,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:21:15,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:21:15,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:21:15,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:21:15,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:21:15,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:21:15,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:21:15,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:21:15,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:21:15,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:21:15,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:21:15,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:21:15,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:21:15,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:21:15,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:21:15,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:21:15,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:21:15,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:21:15,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:21:15,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:21:15,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:21:15,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:21:15,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:21:15,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:21:15,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:21:15,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:21:15,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:21:15,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:21:15,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:21:15,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:21:15,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:21:15,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:21:15,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:21:15,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:21:15,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:21:15,474 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 18:21:15,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:21:15,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:21:15,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:21:15,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:21:15,515 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:21:15,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:21:15,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:21:15,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:21:15,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:21:15,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:21:15,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:21:15,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:21:15,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:21:15,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:21:15,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:21:15,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:21:15,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:21:15,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:21:15,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:21:15,520 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:21:15,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:21:15,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:21:15,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:21:15,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:21:15,843 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:21:15,844 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:21:15,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-08-21 18:21:15,845 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-08-21 18:21:15,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:21:15,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:21:15,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:21:15,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:21:15,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:21:15,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:21:15,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:21:15,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:21:15,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:21:15,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:21:15,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:21:15,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:21:15,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:21:15,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/1) ... [2021-08-21 18:21:15,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:21:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:15,957 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 18:21:15,979 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 18:21:15,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:21:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:21:15,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:21:15,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:21:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:21:15,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:21:15,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:21:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:21:15,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:21:15,997 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:21:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:21:15,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:21:15,998 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 18:21:16,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:21:16,417 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 18:21:16,417 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 18:21:16,418 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 18:21:16,418 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 18:21:16,419 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:21:16 BoogieIcfgContainer [2021-08-21 18:21:16,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:21:16,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:21:16,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:21:16,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:21:16,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:21:15" (1/2) ... [2021-08-21 18:21:16,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66445f22 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:21:16, skipping insertion in model container [2021-08-21 18:21:16,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:21:16" (2/2) ... [2021-08-21 18:21:16,426 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-08-21 18:21:16,429 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:21:16,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:21:16,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:21:16,430 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:21:16,478 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:21:16,545 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:21:16,553 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 18:21:16,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:21:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 2.3125) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 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 18:21:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 18:21:16,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:16,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:16,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1900282435, now seen corresponding path program 1 times [2021-08-21 18:21:16,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:16,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971862438] [2021-08-21 18:21:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:16,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:16,825 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 18:21:16,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:16,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971862438] [2021-08-21 18:21:16,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971862438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:21:16,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:21:16,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:21:16,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680333934] [2021-08-21 18:21:16,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:21:16,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:21:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:21:16,846 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 2.3125) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 18:21:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:16,872 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2021-08-21 18:21:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:21:16,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-08-21 18:21:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:16,881 INFO L225 Difference]: With dead ends: 46 [2021-08-21 18:21:16,881 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 18:21:16,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:21:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 18:21:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 18:21:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 42 transitions. [2021-08-21 18:21:16,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 42 transitions. Word has length 12 [2021-08-21 18:21:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 42 transitions. [2021-08-21 18:21:16,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 18:21:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 42 transitions. [2021-08-21 18:21:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 18:21:16,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:16,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:16,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:21:16,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash 748536701, now seen corresponding path program 1 times [2021-08-21 18:21:16,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:16,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706599454] [2021-08-21 18:21:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:16,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:16,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:16,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706599454] [2021-08-21 18:21:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706599454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:21:16,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:21:16,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:21:16,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189684384] [2021-08-21 18:21:16,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:21:16,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:21:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:21:16,987 INFO L87 Difference]: Start difference. First operand 20 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 18:21:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:16,998 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-08-21 18:21:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:21:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-08-21 18:21:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:17,000 INFO L225 Difference]: With dead ends: 30 [2021-08-21 18:21:17,000 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 18:21:17,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:21:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 18:21:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-08-21 18:21:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 45 transitions. [2021-08-21 18:21:17,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 45 transitions. Word has length 13 [2021-08-21 18:21:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:17,011 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 45 transitions. [2021-08-21 18:21:17,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 18:21:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 45 transitions. [2021-08-21 18:21:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 18:21:17,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:17,013 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:17,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:21:17,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1431220847, now seen corresponding path program 1 times [2021-08-21 18:21:17,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:17,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708851598] [2021-08-21 18:21:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:17,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:17,052 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 18:21:17,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:17,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708851598] [2021-08-21 18:21:17,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708851598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:17,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451065740] [2021-08-21 18:21:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:17,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:17,055 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 18:21:17,067 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 18:21:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:21:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:17,301 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 18:21:17,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451065740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:17,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:17,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 18:21:17,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206870215] [2021-08-21 18:21:17,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:21:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:21:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:21:17,313 INFO L87 Difference]: Start difference. First operand 22 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:17,338 INFO L93 Difference]: Finished difference Result 28 states and 53 transitions. [2021-08-21 18:21:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:21:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 18:21:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:17,340 INFO L225 Difference]: With dead ends: 28 [2021-08-21 18:21:17,340 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 18:21:17,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:21:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 18:21:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-08-21 18:21:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 34 transitions. [2021-08-21 18:21:17,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 34 transitions. Word has length 13 [2021-08-21 18:21:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:17,343 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 34 transitions. [2021-08-21 18:21:17,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 34 transitions. [2021-08-21 18:21:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 18:21:17,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:17,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:17,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 18:21:17,571 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 18:21:17,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash 71104107, now seen corresponding path program 1 times [2021-08-21 18:21:17,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:17,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791273415] [2021-08-21 18:21:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:17,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:17,621 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 18:21:17,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:17,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791273415] [2021-08-21 18:21:17,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791273415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:17,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545845442] [2021-08-21 18:21:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:17,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:17,623 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 18:21:17,630 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 18:21:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:17,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:21:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:17,802 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 18:21:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545845442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:17,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:17,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 18:21:17,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198677545] [2021-08-21 18:21:17,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:21:17,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:17,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:21:17,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:21:17,804 INFO L87 Difference]: Start difference. First operand 18 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:17,832 INFO L93 Difference]: Finished difference Result 29 states and 58 transitions. [2021-08-21 18:21:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:21:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 18:21:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:17,834 INFO L225 Difference]: With dead ends: 29 [2021-08-21 18:21:17,834 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 18:21:17,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:21:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 18:21:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-21 18:21:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 54 transitions. [2021-08-21 18:21:17,841 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 54 transitions. Word has length 13 [2021-08-21 18:21:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 54 transitions. [2021-08-21 18:21:17,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 54 transitions. [2021-08-21 18:21:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 18:21:17,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:17,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:17,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 18:21:18,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 18:21:18,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:18,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1584903233, now seen corresponding path program 1 times [2021-08-21 18:21:18,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:18,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16931847] [2021-08-21 18:21:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:18,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:18,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16931847] [2021-08-21 18:21:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16931847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936751806] [2021-08-21 18:21:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:18,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:18,151 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 18:21:18,160 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 18:21:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:21:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:18,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936751806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:18,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:18,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-21 18:21:18,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081680784] [2021-08-21 18:21:18,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:21:18,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:21:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:21:18,445 INFO L87 Difference]: Start difference. First operand 25 states and 54 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 18:21:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:18,501 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-08-21 18:21:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:21:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 18:21:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:18,503 INFO L225 Difference]: With dead ends: 28 [2021-08-21 18:21:18,503 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 18:21:18,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:21:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 18:21:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 18:21:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 18:21:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 47 transitions. [2021-08-21 18:21:18,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 47 transitions. Word has length 14 [2021-08-21 18:21:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:18,512 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 47 transitions. [2021-08-21 18:21:18,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 18:21:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 47 transitions. [2021-08-21 18:21:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:21:18,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:18,517 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:18,547 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 18:21:18,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:18,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1381523221, now seen corresponding path program 2 times [2021-08-21 18:21:18,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:18,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701933636] [2021-08-21 18:21:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:18,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:21:18,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:18,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701933636] [2021-08-21 18:21:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701933636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:18,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293902969] [2021-08-21 18:21:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:21:18,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:18,806 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 18:21:18,808 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 18:21:18,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:21:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:19,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293902969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:19,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:19,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-21 18:21:19,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805361987] [2021-08-21 18:21:19,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:21:19,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:21:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:21:19,063 INFO L87 Difference]: Start difference. First operand 24 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 18:21:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:19,121 INFO L93 Difference]: Finished difference Result 22 states and 40 transitions. [2021-08-21 18:21:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:21:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 15 [2021-08-21 18:21:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:19,124 INFO L225 Difference]: With dead ends: 22 [2021-08-21 18:21:19,125 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 18:21:19,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:21:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 18:21:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 18:21:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-08-21 18:21:19,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 15 [2021-08-21 18:21:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:19,132 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-08-21 18:21:19,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 18:21:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-08-21 18:21:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:21:19,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:19,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:19,159 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 18:21:19,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:19,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash 84589169, now seen corresponding path program 1 times [2021-08-21 18:21:19,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:19,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511235893] [2021-08-21 18:21:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:19,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:19,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:19,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511235893] [2021-08-21 18:21:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511235893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:21:19,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:21:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:21:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25926253] [2021-08-21 18:21:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:21:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:21:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:21:19,422 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 18:21:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:19,431 INFO L93 Difference]: Finished difference Result 32 states and 54 transitions. [2021-08-21 18:21:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:21:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-08-21 18:21:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:19,432 INFO L225 Difference]: With dead ends: 32 [2021-08-21 18:21:19,432 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 18:21:19,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:21:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 18:21:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-08-21 18:21:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2021-08-21 18:21:19,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 15 [2021-08-21 18:21:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:19,440 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2021-08-21 18:21:19,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 18:21:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2021-08-21 18:21:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:21:19,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:19,440 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:19,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:21:19,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 764647539, now seen corresponding path program 3 times [2021-08-21 18:21:19,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:19,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410934539] [2021-08-21 18:21:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:19,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:19,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:19,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410934539] [2021-08-21 18:21:19,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410934539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:19,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129748256] [2021-08-21 18:21:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:19,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:19,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:19,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:21:19,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:21:19,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:21:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:19,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129748256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:19,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:19,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 18:21:19,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185648561] [2021-08-21 18:21:19,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:21:19,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:21:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:21:19,853 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:19,906 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2021-08-21 18:21:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:21:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 18:21:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:19,907 INFO L225 Difference]: With dead ends: 22 [2021-08-21 18:21:19,907 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 18:21:19,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:21:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 18:21:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 18:21:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 18:21:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2021-08-21 18:21:19,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 15 [2021-08-21 18:21:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:19,909 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2021-08-21 18:21:19,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2021-08-21 18:21:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 18:21:19,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:19,910 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:19,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:20,125 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:20,126 INFO L82 PathProgramCache]: Analyzing trace with hash -595469201, now seen corresponding path program 4 times [2021-08-21 18:21:20,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:20,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327857360] [2021-08-21 18:21:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:20,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:20,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:20,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327857360] [2021-08-21 18:21:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327857360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:20,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852510951] [2021-08-21 18:21:20,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:20,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:20,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:20,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:20,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:21:20,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:20,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:21:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852510951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:20,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:20,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 18:21:20,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801846945] [2021-08-21 18:21:20,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:21:20,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:21:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:21:20,464 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:20,503 INFO L93 Difference]: Finished difference Result 28 states and 47 transitions. [2021-08-21 18:21:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:21:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 18:21:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:20,504 INFO L225 Difference]: With dead ends: 28 [2021-08-21 18:21:20,504 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 18:21:20,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:21:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 18:21:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 18:21:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-08-21 18:21:20,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 15 [2021-08-21 18:21:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:20,506 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-08-21 18:21:20,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-08-21 18:21:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:21:20,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:20,507 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:20,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:20,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:20,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 692273089, now seen corresponding path program 2 times [2021-08-21 18:21:20,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:20,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828417238] [2021-08-21 18:21:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:20,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:20,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:20,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828417238] [2021-08-21 18:21:20,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828417238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:20,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183971606] [2021-08-21 18:21:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:21:20,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:20,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:21:20,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:21:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:21,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183971606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:21,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:21,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 18:21:21,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257663192] [2021-08-21 18:21:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:21:21,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:21:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:21:21,376 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 18:21:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:21,547 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-08-21 18:21:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:21:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 16 [2021-08-21 18:21:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:21,548 INFO L225 Difference]: With dead ends: 42 [2021-08-21 18:21:21,548 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 18:21:21,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:21:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 18:21:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-08-21 18:21:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 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 18:21:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-08-21 18:21:21,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 16 [2021-08-21 18:21:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-08-21 18:21:21,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 18:21:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-08-21 18:21:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:21:21,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:21,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:21,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:21,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:21,773 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1372331459, now seen corresponding path program 5 times [2021-08-21 18:21:21,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:21,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168784332] [2021-08-21 18:21:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:21,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:21,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:21,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168784332] [2021-08-21 18:21:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168784332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:21,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087665288] [2021-08-21 18:21:21,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:21,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:21,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:21,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:21:22,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:21:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:21:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:22,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:22,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087665288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:22,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:22,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 18:21:22,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929683421] [2021-08-21 18:21:22,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:21:22,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:22,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:21:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:21:22,372 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 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 18:21:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:22,400 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-08-21 18:21:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:21:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 18:21:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:22,402 INFO L225 Difference]: With dead ends: 44 [2021-08-21 18:21:22,402 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 18:21:22,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:21:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 18:21:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-08-21 18:21:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 71 transitions. [2021-08-21 18:21:22,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 71 transitions. Word has length 16 [2021-08-21 18:21:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:22,415 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 71 transitions. [2021-08-21 18:21:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 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 18:21:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 71 transitions. [2021-08-21 18:21:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:21:22,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:22,416 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:22,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 18:21:22,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 18:21:22,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash 12214719, now seen corresponding path program 6 times [2021-08-21 18:21:22,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:22,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947733673] [2021-08-21 18:21:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:22,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:22,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:22,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947733673] [2021-08-21 18:21:22,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947733673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:22,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859834379] [2021-08-21 18:21:22,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:22,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:22,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:22,741 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:22,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:21:22,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:21:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:22,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:21:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:23,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859834379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:23,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:23,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 18:21:23,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797666534] [2021-08-21 18:21:23,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:21:23,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:21:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:21:23,091 INFO L87 Difference]: Start difference. First operand 35 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:21:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:23,156 INFO L93 Difference]: Finished difference Result 30 states and 50 transitions. [2021-08-21 18:21:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:21:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 16 [2021-08-21 18:21:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:23,157 INFO L225 Difference]: With dead ends: 30 [2021-08-21 18:21:23,157 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 18:21:23,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:21:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 18:21:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 18:21:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 43 transitions. [2021-08-21 18:21:23,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 43 transitions. Word has length 16 [2021-08-21 18:21:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:23,161 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 43 transitions. [2021-08-21 18:21:23,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 18:21:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 43 transitions. [2021-08-21 18:21:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:21:23,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:23,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:23,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:23,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:23,377 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1957578415, now seen corresponding path program 3 times [2021-08-21 18:21:23,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:23,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005601500] [2021-08-21 18:21:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:23,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:23,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:23,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005601500] [2021-08-21 18:21:23,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005601500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:23,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79368657] [2021-08-21 18:21:23,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:23,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:23,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:23,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:23,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:21:23,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:21:23,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:21:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79368657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:24,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:24,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-21 18:21:24,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223674773] [2021-08-21 18:21:24,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:21:24,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:21:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:21:24,037 INFO L87 Difference]: Start difference. First operand 26 states and 43 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:24,173 INFO L93 Difference]: Finished difference Result 34 states and 55 transitions. [2021-08-21 18:21:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:21:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:21:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:24,174 INFO L225 Difference]: With dead ends: 34 [2021-08-21 18:21:24,174 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 18:21:24,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:21:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 18:21:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-08-21 18:21:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 18:21:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 48 transitions. [2021-08-21 18:21:24,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 48 transitions. Word has length 17 [2021-08-21 18:21:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 48 transitions. [2021-08-21 18:21:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 48 transitions. [2021-08-21 18:21:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:21:24,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:24,176 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:24,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:24,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:21:24,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1277520045, now seen corresponding path program 4 times [2021-08-21 18:21:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:24,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384150997] [2021-08-21 18:21:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:24,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:24,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:24,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384150997] [2021-08-21 18:21:24,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384150997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:24,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804372245] [2021-08-21 18:21:24,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:24,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:24,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:24,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:21:24,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:24,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:21:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804372245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 18:21:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259792769] [2021-08-21 18:21:25,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:21:25,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:21:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:21:25,158 INFO L87 Difference]: Start difference. First operand 28 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:25,299 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-08-21 18:21:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:21:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:21:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:25,300 INFO L225 Difference]: With dead ends: 29 [2021-08-21 18:21:25,300 INFO L226 Difference]: Without dead ends: 28 [2021-08-21 18:21:25,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:21:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-21 18:21:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-21 18:21:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 46 transitions. [2021-08-21 18:21:25,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 46 transitions. Word has length 17 [2021-08-21 18:21:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:25,303 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 46 transitions. [2021-08-21 18:21:25,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 46 transitions. [2021-08-21 18:21:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:21:25,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:25,303 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:25,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:25,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:21:25,528 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1767629439, now seen corresponding path program 5 times [2021-08-21 18:21:25,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:25,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064988864] [2021-08-21 18:21:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:25,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:25,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:25,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064988864] [2021-08-21 18:21:25,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064988864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:25,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327456815] [2021-08-21 18:21:25,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:25,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:25,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:25,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:21:25,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:21:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:21:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:26,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327456815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:26,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:26,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 18:21:26,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451024038] [2021-08-21 18:21:26,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:21:26,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:21:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:21:26,413 INFO L87 Difference]: Start difference. First operand 28 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:21:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:26,592 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2021-08-21 18:21:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:21:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:21:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:26,593 INFO L225 Difference]: With dead ends: 54 [2021-08-21 18:21:26,593 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 18:21:26,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:21:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 18:21:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2021-08-21 18:21:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 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 18:21:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 52 transitions. [2021-08-21 18:21:26,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 52 transitions. Word has length 18 [2021-08-21 18:21:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:26,595 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 52 transitions. [2021-08-21 18:21:26,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:21:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 52 transitions. [2021-08-21 18:21:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:21:26,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:26,596 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:26,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:26,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:21:26,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1847279487, now seen corresponding path program 6 times [2021-08-21 18:21:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:26,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857250634] [2021-08-21 18:21:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:26,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:27,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857250634] [2021-08-21 18:21:27,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857250634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016488888] [2021-08-21 18:21:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:27,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:27,089 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:27,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:21:27,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:21:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:27,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:21:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:27,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016488888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:27,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:27,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 18:21:27,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200516991] [2021-08-21 18:21:27,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:21:27,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:21:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:21:27,752 INFO L87 Difference]: Start difference. First operand 27 states and 52 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:21:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:27,857 INFO L93 Difference]: Finished difference Result 43 states and 84 transitions. [2021-08-21 18:21:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:21:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:21:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:27,858 INFO L225 Difference]: With dead ends: 43 [2021-08-21 18:21:27,858 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 18:21:27,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:21:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 18:21:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-21 18:21:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 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 18:21:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 75 transitions. [2021-08-21 18:21:27,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 75 transitions. Word has length 18 [2021-08-21 18:21:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:27,861 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 75 transitions. [2021-08-21 18:21:27,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:21:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 75 transitions. [2021-08-21 18:21:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:21:27,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:27,861 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:27,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:28,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:21:28,085 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash -891928911, now seen corresponding path program 7 times [2021-08-21 18:21:28,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:28,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192848789] [2021-08-21 18:21:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:28,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:28,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:28,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192848789] [2021-08-21 18:21:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192848789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:28,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315202334] [2021-08-21 18:21:28,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:21:28,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:28,302 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:28,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:21:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:21:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:29,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315202334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:29,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-21 18:21:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068102967] [2021-08-21 18:21:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:21:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:21:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:21:29,164 INFO L87 Difference]: Start difference. First operand 34 states and 75 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:29,321 INFO L93 Difference]: Finished difference Result 39 states and 68 transitions. [2021-08-21 18:21:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:21:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 18:21:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:29,322 INFO L225 Difference]: With dead ends: 39 [2021-08-21 18:21:29,322 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 18:21:29,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:21:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 18:21:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-08-21 18:21:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 18:21:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-08-21 18:21:29,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 19 [2021-08-21 18:21:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:29,324 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-08-21 18:21:29,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-08-21 18:21:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 18:21:29,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:29,325 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:29,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:21:29,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:29,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -211870541, now seen corresponding path program 8 times [2021-08-21 18:21:29,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:29,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440311505] [2021-08-21 18:21:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:29,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:29,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440311505] [2021-08-21 18:21:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440311505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989234340] [2021-08-21 18:21:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:21:29,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:29,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:29,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:21:29,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:29,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:21:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:30,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:21:30,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989234340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:30,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:30,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 18:21:30,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5378639] [2021-08-21 18:21:30,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:21:30,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:21:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:21:30,466 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 18:21:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:30,641 INFO L93 Difference]: Finished difference Result 29 states and 48 transitions. [2021-08-21 18:21:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:21:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 19 [2021-08-21 18:21:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:30,642 INFO L225 Difference]: With dead ends: 29 [2021-08-21 18:21:30,642 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 18:21:30,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:21:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 18:21:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 18:21:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 45 transitions. [2021-08-21 18:21:30,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 45 transitions. Word has length 19 [2021-08-21 18:21:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:30,643 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 45 transitions. [2021-08-21 18:21:30,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 18:21:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 45 transitions. [2021-08-21 18:21:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:21:30,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:30,644 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:30,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:30,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:21:30,857 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 484983681, now seen corresponding path program 9 times [2021-08-21 18:21:30,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:30,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747029057] [2021-08-21 18:21:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:30,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:31,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:31,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747029057] [2021-08-21 18:21:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747029057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:31,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249077497] [2021-08-21 18:21:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:31,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:31,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:31,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:31,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:21:31,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:21:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:21:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:31,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:32,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249077497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:32,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:32,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-21 18:21:32,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480909901] [2021-08-21 18:21:32,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:21:32,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:21:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:21:32,001 INFO L87 Difference]: Start difference. First operand 27 states and 45 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 18:21:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:32,343 INFO L93 Difference]: Finished difference Result 133 states and 221 transitions. [2021-08-21 18:21:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:21:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:21:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:32,345 INFO L225 Difference]: With dead ends: 133 [2021-08-21 18:21:32,345 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:21:32,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:21:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:21:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 41. [2021-08-21 18:21:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 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 18:21:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2021-08-21 18:21:32,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 20 [2021-08-21 18:21:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:32,355 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2021-08-21 18:21:32,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 18:21:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2021-08-21 18:21:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:21:32,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:32,357 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:32,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:32,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:32,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1165042051, now seen corresponding path program 10 times [2021-08-21 18:21:32,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:32,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832166663] [2021-08-21 18:21:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:32,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:32,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:32,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832166663] [2021-08-21 18:21:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832166663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:32,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679803419] [2021-08-21 18:21:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:32,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:32,862 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:32,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:21:33,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:33,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:21:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:33,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:21:33,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679803419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:33,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:33,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 18:21:33,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796165227] [2021-08-21 18:21:33,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:21:33,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:21:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:21:33,838 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 18:21:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:34,190 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2021-08-21 18:21:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:21:34,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 20 [2021-08-21 18:21:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:34,191 INFO L225 Difference]: With dead ends: 81 [2021-08-21 18:21:34,191 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 18:21:34,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:21:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 18:21:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-08-21 18:21:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 182 transitions. [2021-08-21 18:21:34,207 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 182 transitions. Word has length 20 [2021-08-21 18:21:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:34,207 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 182 transitions. [2021-08-21 18:21:34,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 18:21:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 182 transitions. [2021-08-21 18:21:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:21:34,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:34,208 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:34,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:34,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:34,416 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash -195074689, now seen corresponding path program 11 times [2021-08-21 18:21:34,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:34,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466357390] [2021-08-21 18:21:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:34,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:34,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:34,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466357390] [2021-08-21 18:21:34,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466357390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:34,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843689288] [2021-08-21 18:21:34,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:34,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:34,554 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:34,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:21:34,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:21:34,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:21:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:35,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843689288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:35,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:35,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-21 18:21:35,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070512849] [2021-08-21 18:21:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:21:35,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:21:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:21:35,531 INFO L87 Difference]: Start difference. First operand 65 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 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 18:21:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:35,599 INFO L93 Difference]: Finished difference Result 45 states and 105 transitions. [2021-08-21 18:21:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:21:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:21:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:35,600 INFO L225 Difference]: With dead ends: 45 [2021-08-21 18:21:35,600 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 18:21:35,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:21:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 18:21:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-21 18:21:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 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 18:21:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 105 transitions. [2021-08-21 18:21:35,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 105 transitions. Word has length 20 [2021-08-21 18:21:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:35,603 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 105 transitions. [2021-08-21 18:21:35,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 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 18:21:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 105 transitions. [2021-08-21 18:21:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:21:35,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:35,604 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:35,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:35,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 113605423, now seen corresponding path program 12 times [2021-08-21 18:21:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:35,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126586658] [2021-08-21 18:21:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:35,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:36,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:36,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126586658] [2021-08-21 18:21:36,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126586658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:36,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299463188] [2021-08-21 18:21:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:36,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:36,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:36,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:21:36,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:21:36,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:36,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:21:36,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:36,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:21:37,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299463188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:37,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 18:21:37,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969355376] [2021-08-21 18:21:37,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:21:37,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:21:37,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:21:37,180 INFO L87 Difference]: Start difference. First operand 45 states and 105 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:37,506 INFO L93 Difference]: Finished difference Result 56 states and 125 transitions. [2021-08-21 18:21:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:21:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:21:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:37,509 INFO L225 Difference]: With dead ends: 56 [2021-08-21 18:21:37,509 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 18:21:37,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:21:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 18:21:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-21 18:21:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 0 states have call successors, (0), 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 18:21:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 115 transitions. [2021-08-21 18:21:37,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 115 transitions. Word has length 21 [2021-08-21 18:21:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:37,511 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 115 transitions. [2021-08-21 18:21:37,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 115 transitions. [2021-08-21 18:21:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:21:37,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:37,511 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:37,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:37,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:37,725 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1246511317, now seen corresponding path program 13 times [2021-08-21 18:21:37,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:37,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844057347] [2021-08-21 18:21:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:37,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:37,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:37,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844057347] [2021-08-21 18:21:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844057347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:37,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908391265] [2021-08-21 18:21:37,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:21:37,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:37,936 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:37,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:21:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:21:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:39,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908391265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:39,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:39,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 18:21:39,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992386501] [2021-08-21 18:21:39,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:21:39,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:21:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:21:39,171 INFO L87 Difference]: Start difference. First operand 49 states and 115 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:39,329 INFO L93 Difference]: Finished difference Result 49 states and 113 transitions. [2021-08-21 18:21:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:21:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:21:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:39,330 INFO L225 Difference]: With dead ends: 49 [2021-08-21 18:21:39,330 INFO L226 Difference]: Without dead ends: 49 [2021-08-21 18:21:39,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:21:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-21 18:21:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-21 18:21:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 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 18:21:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 113 transitions. [2021-08-21 18:21:39,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 113 transitions. Word has length 21 [2021-08-21 18:21:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:39,332 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 113 transitions. [2021-08-21 18:21:39,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 113 transitions. [2021-08-21 18:21:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:21:39,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:39,333 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:39,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 18:21:39,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:21:39,537 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1878808323, now seen corresponding path program 14 times [2021-08-21 18:21:39,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:39,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669008878] [2021-08-21 18:21:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:39,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:39,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:39,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669008878] [2021-08-21 18:21:39,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669008878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:39,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659162778] [2021-08-21 18:21:39,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:21:39,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:39,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:39,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:39,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:21:40,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:21:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:40,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:21:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:40,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-21 18:21:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:41,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659162778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:41,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:41,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 18:21:41,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741647050] [2021-08-21 18:21:41,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:21:41,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:21:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:21:41,142 INFO L87 Difference]: Start difference. First operand 49 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:21:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:41,392 INFO L93 Difference]: Finished difference Result 88 states and 181 transitions. [2021-08-21 18:21:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:21:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:21:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:41,393 INFO L225 Difference]: With dead ends: 88 [2021-08-21 18:21:41,393 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 18:21:41,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:21:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 18:21:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-08-21 18:21:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4285714285714284) internal successors, (153), 63 states have internal predecessors, (153), 0 states have call successors, (0), 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 18:21:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2021-08-21 18:21:41,396 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 22 [2021-08-21 18:21:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:41,396 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2021-08-21 18:21:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:21:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2021-08-21 18:21:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:21:41,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:41,396 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:41,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:21:41,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:21:41,621 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:41,622 INFO L82 PathProgramCache]: Analyzing trace with hash 518691583, now seen corresponding path program 15 times [2021-08-21 18:21:41,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:41,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812015401] [2021-08-21 18:21:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:41,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:41,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:41,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812015401] [2021-08-21 18:21:41,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812015401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:41,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803968065] [2021-08-21 18:21:41,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:21:41,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:41,932 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:41,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:21:42,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:21:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:21:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:43,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803968065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:43,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:43,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 18:21:43,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138619526] [2021-08-21 18:21:43,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:21:43,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:21:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:21:43,225 INFO L87 Difference]: Start difference. First operand 64 states and 153 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:21:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:43,511 INFO L93 Difference]: Finished difference Result 92 states and 180 transitions. [2021-08-21 18:21:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:21:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:21:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:43,512 INFO L225 Difference]: With dead ends: 92 [2021-08-21 18:21:43,512 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 18:21:43,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:21:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 18:21:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-08-21 18:21:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 55 states have internal predecessors, (135), 0 states have call successors, (0), 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 18:21:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 135 transitions. [2021-08-21 18:21:43,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 135 transitions. Word has length 22 [2021-08-21 18:21:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:43,514 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 135 transitions. [2021-08-21 18:21:43,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:21:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 135 transitions. [2021-08-21 18:21:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:21:43,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:43,515 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:43,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:21:43,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:43,725 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 191460655, now seen corresponding path program 16 times [2021-08-21 18:21:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:43,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448583332] [2021-08-21 18:21:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:43,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448583332] [2021-08-21 18:21:44,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448583332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116363694] [2021-08-21 18:21:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:21:44,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:44,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:44,065 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:44,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:21:44,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:21:44,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:21:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:45,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116363694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:45,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:45,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 18:21:45,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783479154] [2021-08-21 18:21:45,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:21:45,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:21:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:21:45,575 INFO L87 Difference]: Start difference. First operand 56 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:45,834 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2021-08-21 18:21:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:21:45,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:21:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:45,835 INFO L225 Difference]: With dead ends: 62 [2021-08-21 18:21:45,835 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 18:21:45,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:21:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 18:21:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-08-21 18:21:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:21:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2021-08-21 18:21:45,838 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 23 [2021-08-21 18:21:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2021-08-21 18:21:45,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2021-08-21 18:21:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:21:45,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:45,838 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:45,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:46,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:46,045 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:46,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2646781, now seen corresponding path program 17 times [2021-08-21 18:21:46,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:46,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422386811] [2021-08-21 18:21:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:46,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:46,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422386811] [2021-08-21 18:21:46,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422386811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:46,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178643835] [2021-08-21 18:21:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:21:46,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:46,322 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:46,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:21:46,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:21:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:21:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:47,809 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:21:47,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-08-21 18:21:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178643835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:50,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:50,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-08-21 18:21:50,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916505085] [2021-08-21 18:21:50,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:21:50,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:21:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=460, Unknown=1, NotChecked=0, Total=552 [2021-08-21 18:21:50,116 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:56,529 INFO L93 Difference]: Finished difference Result 136 states and 265 transitions. [2021-08-21 18:21:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:21:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:21:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:56,530 INFO L225 Difference]: With dead ends: 136 [2021-08-21 18:21:56,530 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:21:56,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2633.2ms TimeCoverageRelationStatistics Valid=136, Invalid=675, Unknown=1, NotChecked=0, Total=812 [2021-08-21 18:21:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:21:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2021-08-21 18:21:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 0 states have call successors, (0), 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 18:21:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2021-08-21 18:21:56,534 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 24 [2021-08-21 18:21:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:56,534 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2021-08-21 18:21:56,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2021-08-21 18:21:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:21:56,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:56,534 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:56,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:56,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:21:56,735 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1362763521, now seen corresponding path program 18 times [2021-08-21 18:21:56,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:56,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520179462] [2021-08-21 18:21:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:56,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:57,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:57,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520179462] [2021-08-21 18:21:57,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520179462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:57,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480250895] [2021-08-21 18:21:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:21:57,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:57,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:57,096 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:57,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:21:57,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:21:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:21:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:21:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:21:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:58,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480250895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:58,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:21:58,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-08-21 18:21:58,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237303207] [2021-08-21 18:21:58,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:21:58,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:21:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:21:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:21:58,745 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:21:58,916 INFO L93 Difference]: Finished difference Result 77 states and 187 transitions. [2021-08-21 18:21:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:21:58,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:21:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:21:58,917 INFO L225 Difference]: With dead ends: 77 [2021-08-21 18:21:58,917 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 18:21:58,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:21:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 18:21:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-21 18:21:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5217391304347827) internal successors, (174), 69 states have internal predecessors, (174), 0 states have call successors, (0), 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 18:21:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2021-08-21 18:21:58,920 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 24 [2021-08-21 18:21:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:21:58,920 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2021-08-21 18:21:58,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:21:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2021-08-21 18:21:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:21:58,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:21:58,921 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:21:58,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:21:59,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:21:59,129 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:21:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:21:59,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1602867565, now seen corresponding path program 19 times [2021-08-21 18:21:59,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:21:59,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972688958] [2021-08-21 18:21:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:21:59,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:21:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:21:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:21:59,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:21:59,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972688958] [2021-08-21 18:21:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972688958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:21:59,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713183482] [2021-08-21 18:21:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:21:59,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:21:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:21:59,432 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:21:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:22:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:22:00,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:01,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713183482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:01,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:01,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-08-21 18:22:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119041491] [2021-08-21 18:22:01,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:22:01,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:22:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:22:01,377 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:01,860 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2021-08-21 18:22:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:22:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 18:22:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:01,861 INFO L225 Difference]: With dead ends: 98 [2021-08-21 18:22:01,861 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 18:22:01,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 937.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:22:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 18:22:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 18:22:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 18:22:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 18:22:01,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-08-21 18:22:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 18:22:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 18:22:01,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 18:22:01,864 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:22:01,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:22:01,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:22:01,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:22:01,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:02,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:22:02,093 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:22:02,093 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:22:02,100 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:22:02 BasicIcfg [2021-08-21 18:22:02,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:22:02,101 INFO L168 Benchmark]: Toolchain (without parser) took 46219.05 ms. Allocated memory was 186.6 MB in the beginning and 434.1 MB in the end (delta: 247.5 MB). Free memory was 167.1 MB in the beginning and 340.0 MB in the end (delta: -172.8 MB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:02,101 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.56 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:22:02,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.90 ms. Allocated memory is still 186.6 MB. Free memory was 167.1 MB in the beginning and 165.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:02,101 INFO L168 Benchmark]: Boogie Preprocessor took 21.76 ms. Allocated memory is still 186.6 MB. Free memory was 165.7 MB in the beginning and 164.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:02,101 INFO L168 Benchmark]: RCFGBuilder took 486.82 ms. Allocated memory is still 186.6 MB. Free memory was 164.4 MB in the beginning and 135.9 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:02,102 INFO L168 Benchmark]: TraceAbstraction took 45679.16 ms. Allocated memory was 186.6 MB in the beginning and 434.1 MB in the end (delta: 247.5 MB). Free memory was 135.5 MB in the beginning and 340.0 MB in the end (delta: -204.5 MB). Peak memory consumption was 44.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:22:02,103 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 0.56 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.90 ms. Allocated memory is still 186.6 MB. Free memory was 167.1 MB in the beginning and 165.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.76 ms. Allocated memory is still 186.6 MB. Free memory was 165.7 MB in the beginning and 164.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 486.82 ms. Allocated memory is still 186.6 MB. Free memory was 164.4 MB in the beginning and 135.9 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45679.16 ms. Allocated memory was 186.6 MB in the beginning and 434.1 MB in the end (delta: 247.5 MB). Free memory was 135.5 MB in the beginning and 340.0 MB in the end (delta: -204.5 MB). Peak memory consumption was 44.3 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: 54, positive: 36, positive conditional: 36, positive unconditional: 0, negative: 18, negative conditional: 18, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 42, positive: 36, positive conditional: 0, positive unconditional: 36, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 47, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 47, negative conditional: 0, negative unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 42, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 12 - 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 - PositiveResult [Line: 125]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 45549.7ms, OverallIterations: 29, TraceHistogramMax: 7, EmptinessCheckTime: 32.6ms, AutomataDifference: 10667.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 123.4ms, PartialOrderReductionTime: 108.4ms, HoareTripleCheckerStatistics: 565 SDtfs, 847 SDslu, 4034 SDs, 0 SdLazy, 2298 SolverSat, 229 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7451.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 752 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 10233.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=27, InterpolantAutomatonStates: 268, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 134.8ms AutomataMinimizationTime, 29 MinimizatonAttempts, 266 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 194.9ms SsaConstructionTime, 673.5ms SatisfiabilityAnalysisTime, 20506.0ms InterpolantComputationTime, 1006 NumberOfCodeBlocks, 1006 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 951 ConstructedInterpolants, 40 QuantifiedInterpolants, 10816 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1315 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 55 InterpolantComputations, 3 PerfectInterpolantSequences, 224/752 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 18:22:02,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...