/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:44:04,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:44:04,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:44:05,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:44:05,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 17:44:05,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 17:44:05,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 17:44:05,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 17:44:05,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 17:44:05,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 17:44:05,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 17:44:05,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 17:44:05,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 17:44:05,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 17:44:05,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 17:44:05,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 17:44:05,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 17:44:05,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:44:05,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:44:05,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:44:05,049 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-Separate.epf [2022-01-18 17:44:05,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:44:05,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:44:05,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:44:05,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:44:05,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:44:05,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:44:05,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:44:05,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:44:05,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:44:05,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:44:05,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:44:05,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:44:05,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:44:05,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:44:05,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:44:05,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:44:05,276 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:44:05,279 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:44:05,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2022-01-18 17:44:05,280 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2022-01-18 17:44:05,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:44:05,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:44:05,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:44:05,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:44:05,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:44:05,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,320 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:44:05,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:44:05,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:44:05,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:44:05,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:44:05,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:44:05,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:44:05,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:44:05,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:44:05,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/1) ... [2022-01-18 17:44:05,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:44:05,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:05,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 17:44:05,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 17:44:05,404 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:44:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:44:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:44:05,405 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:44:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:44:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:44:05,405 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:44:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:44:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:44:05,405 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:44:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:44:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:44:05,406 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 17:44:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 17:44:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 17:44:05,407 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 17:44:05,442 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:44:05,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:44:05,515 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:44:05,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:44:05,527 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:44:05,529 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:44:05 BoogieIcfgContainer [2022-01-18 17:44:05,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:44:05,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:44:05,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:44:05,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:44:05,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:44:05" (1/2) ... [2022-01-18 17:44:05,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733d0bc5 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:44:05, skipping insertion in model container [2022-01-18 17:44:05,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:44:05" (2/2) ... [2022-01-18 17:44:05,534 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2022-01-18 17:44:05,536 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:44:05,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:44:05,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:44:05,537 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:44:05,561 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 17:44:05,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:44:05,609 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 17:44:05,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 17:44:05,615 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-01-18 17:44:05,704 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:44:05,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:05,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:05,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 792171695, now seen corresponding path program 1 times [2022-01-18 17:44:05,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:05,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916831620] [2022-01-18 17:44:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:05,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:05,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916831620] [2022-01-18 17:44:05,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916831620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:05,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:05,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:44:05,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072735570] [2022-01-18 17:44:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:44:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:05,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:44:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:05,845 INFO L87 Difference]: Start difference. First operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:05,897 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2022-01-18 17:44:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:44:05,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-01-18 17:44:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:05,913 INFO L225 Difference]: With dead ends: 856 [2022-01-18 17:44:05,913 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 17:44:05,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:44:05,917 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:05,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 17:44:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2022-01-18 17:44:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2022-01-18 17:44:06,045 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2022-01-18 17:44:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:06,046 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2022-01-18 17:44:06,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2022-01-18 17:44:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:06,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:06,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:06,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:44:06,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1463348563, now seen corresponding path program 1 times [2022-01-18 17:44:06,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:06,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243301215] [2022-01-18 17:44:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:06,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243301215] [2022-01-18 17:44:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243301215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980461365] [2022-01-18 17:44:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:06,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:06,139 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) [2022-01-18 17:44:06,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 17:44:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:44:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980461365] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:06,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:44:06,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 17:44:06,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674003918] [2022-01-18 17:44:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:06,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:06,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:44:06,361 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:06,475 INFO L93 Difference]: Finished difference Result 1568 states and 5771 transitions. [2022-01-18 17:44:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:06,485 INFO L225 Difference]: With dead ends: 1568 [2022-01-18 17:44:06,485 INFO L226 Difference]: Without dead ends: 1568 [2022-01-18 17:44:06,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:44:06,489 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:06,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 73 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-01-18 17:44:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 817. [2022-01-18 17:44:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.7830882352941178) internal successors, (3087), 816 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 3087 transitions. [2022-01-18 17:44:06,536 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 3087 transitions. Word has length 23 [2022-01-18 17:44:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:06,536 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 3087 transitions. [2022-01-18 17:44:06,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 3087 transitions. [2022-01-18 17:44:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:06,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:06,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:06,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:06,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1782373011, now seen corresponding path program 1 times [2022-01-18 17:44:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:06,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519007760] [2022-01-18 17:44:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:06,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:06,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519007760] [2022-01-18 17:44:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519007760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:06,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:06,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:44:06,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144441264] [2022-01-18 17:44:06,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:06,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:06,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:06,822 INFO L87 Difference]: Start difference. First operand 817 states and 3087 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:06,874 INFO L93 Difference]: Finished difference Result 911 states and 3304 transitions. [2022-01-18 17:44:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:44:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:06,879 INFO L225 Difference]: With dead ends: 911 [2022-01-18 17:44:06,879 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 17:44:06,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:06,881 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:06,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 17:44:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 785. [2022-01-18 17:44:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.7997448979591835) internal successors, (2979), 784 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2979 transitions. [2022-01-18 17:44:06,903 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2979 transitions. Word has length 23 [2022-01-18 17:44:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2979 transitions. [2022-01-18 17:44:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2979 transitions. [2022-01-18 17:44:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:06,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:06,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:06,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 17:44:06,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 736027925, now seen corresponding path program 2 times [2022-01-18 17:44:06,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:06,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099574444] [2022-01-18 17:44:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:06,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:06,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:06,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099574444] [2022-01-18 17:44:06,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099574444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:06,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:44:06,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105685130] [2022-01-18 17:44:06,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:06,952 INFO L87 Difference]: Start difference. First operand 785 states and 2979 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,030 INFO L93 Difference]: Finished difference Result 1413 states and 5150 transitions. [2022-01-18 17:44:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:44:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,037 INFO L225 Difference]: With dead ends: 1413 [2022-01-18 17:44:07,037 INFO L226 Difference]: Without dead ends: 1413 [2022-01-18 17:44:07,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:07,042 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 75 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-01-18 17:44:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 869. [2022-01-18 17:44:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.743087557603687) internal successors, (3249), 868 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3249 transitions. [2022-01-18 17:44:07,070 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3249 transitions. Word has length 23 [2022-01-18 17:44:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,070 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 3249 transitions. [2022-01-18 17:44:07,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3249 transitions. [2022-01-18 17:44:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:07,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:07,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 17:44:07,073 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2123902699, now seen corresponding path program 2 times [2022-01-18 17:44:07,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:07,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199623156] [2022-01-18 17:44:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199623156] [2022-01-18 17:44:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199623156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:07,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:07,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 17:44:07,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410822976] [2022-01-18 17:44:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:07,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 17:44:07,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 17:44:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:07,156 INFO L87 Difference]: Start difference. First operand 869 states and 3249 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,252 INFO L93 Difference]: Finished difference Result 1346 states and 4899 transitions. [2022-01-18 17:44:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,259 INFO L225 Difference]: With dead ends: 1346 [2022-01-18 17:44:07,259 INFO L226 Difference]: Without dead ends: 1310 [2022-01-18 17:44:07,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:44:07,262 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-01-18 17:44:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 915. [2022-01-18 17:44:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.7308533916849016) internal successors, (3410), 914 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3410 transitions. [2022-01-18 17:44:07,311 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3410 transitions. Word has length 23 [2022-01-18 17:44:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,314 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 3410 transitions. [2022-01-18 17:44:07,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3410 transitions. [2022-01-18 17:44:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:07,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:07,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 17:44:07,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1980678467, now seen corresponding path program 3 times [2022-01-18 17:44:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463905460] [2022-01-18 17:44:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463905460] [2022-01-18 17:44:07,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463905460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:07,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:07,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:44:07,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843495513] [2022-01-18 17:44:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:07,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:07,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:07,373 INFO L87 Difference]: Start difference. First operand 915 states and 3410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,432 INFO L93 Difference]: Finished difference Result 1446 states and 5318 transitions. [2022-01-18 17:44:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:44:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,439 INFO L225 Difference]: With dead ends: 1446 [2022-01-18 17:44:07,439 INFO L226 Difference]: Without dead ends: 1424 [2022-01-18 17:44:07,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:07,439 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 49 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-18 17:44:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1117. [2022-01-18 17:44:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 3.8082437275985663) internal successors, (4250), 1116 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 4250 transitions. [2022-01-18 17:44:07,465 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 4250 transitions. Word has length 23 [2022-01-18 17:44:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,466 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 4250 transitions. [2022-01-18 17:44:07,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 4250 transitions. [2022-01-18 17:44:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 17:44:07,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:07,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 17:44:07,469 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:07,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1924327101, now seen corresponding path program 4 times [2022-01-18 17:44:07,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:07,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304941010] [2022-01-18 17:44:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304941010] [2022-01-18 17:44:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304941010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:07,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:07,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 17:44:07,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970643033] [2022-01-18 17:44:07,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:07,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 17:44:07,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 17:44:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:07,507 INFO L87 Difference]: Start difference. First operand 1117 states and 4250 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,548 INFO L93 Difference]: Finished difference Result 1471 states and 5538 transitions. [2022-01-18 17:44:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:44:07,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-01-18 17:44:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,555 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 17:44:07,555 INFO L226 Difference]: Without dead ends: 1471 [2022-01-18 17:44:07,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:07,556 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 51 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-01-18 17:44:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1137. [2022-01-18 17:44:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.8221830985915495) internal successors, (4342), 1136 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 4342 transitions. [2022-01-18 17:44:07,582 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 4342 transitions. Word has length 23 [2022-01-18 17:44:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,582 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 4342 transitions. [2022-01-18 17:44:07,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 4342 transitions. [2022-01-18 17:44:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:44:07,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:07,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 17:44:07,585 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1459606317, now seen corresponding path program 1 times [2022-01-18 17:44:07,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:07,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089218570] [2022-01-18 17:44:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:07,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089218570] [2022-01-18 17:44:07,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089218570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:07,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287401684] [2022-01-18 17:44:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:07,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:07,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:44:07,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 17:44:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:07,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:44:07,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:07,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287401684] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:07,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:44:07,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 17:44:07,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196081909] [2022-01-18 17:44:07,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:07,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:07,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:07,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:44:07,784 INFO L87 Difference]: Start difference. First operand 1137 states and 4342 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:07,846 INFO L93 Difference]: Finished difference Result 1771 states and 6544 transitions. [2022-01-18 17:44:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2022-01-18 17:44:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:07,855 INFO L225 Difference]: With dead ends: 1771 [2022-01-18 17:44:07,855 INFO L226 Difference]: Without dead ends: 1692 [2022-01-18 17:44:07,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:44:07,856 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 60 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-01-18 17:44:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1058. [2022-01-18 17:44:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.7899716177861875) internal successors, (4006), 1057 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4006 transitions. [2022-01-18 17:44:07,883 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4006 transitions. Word has length 25 [2022-01-18 17:44:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 4006 transitions. [2022-01-18 17:44:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4006 transitions. [2022-01-18 17:44:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:44:07,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:07,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:07,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:08,099 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,SelfDestructingSolverStorable7 [2022-01-18 17:44:08,099 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash 966321903, now seen corresponding path program 2 times [2022-01-18 17:44:08,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202279197] [2022-01-18 17:44:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:08,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202279197] [2022-01-18 17:44:08,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202279197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:08,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:08,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:44:08,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073845463] [2022-01-18 17:44:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:08,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:08,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:08,147 INFO L87 Difference]: Start difference. First operand 1058 states and 4006 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:08,183 INFO L93 Difference]: Finished difference Result 1311 states and 4876 transitions. [2022-01-18 17:44:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:44:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2022-01-18 17:44:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:08,189 INFO L225 Difference]: With dead ends: 1311 [2022-01-18 17:44:08,189 INFO L226 Difference]: Without dead ends: 1311 [2022-01-18 17:44:08,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:08,190 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:08,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-01-18 17:44:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1077. [2022-01-18 17:44:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 3.774163568773234) internal successors, (4061), 1076 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 4061 transitions. [2022-01-18 17:44:08,213 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 4061 transitions. Word has length 25 [2022-01-18 17:44:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:08,213 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 4061 transitions. [2022-01-18 17:44:08,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 4061 transitions. [2022-01-18 17:44:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:44:08,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:08,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:08,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 17:44:08,216 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957573, now seen corresponding path program 1 times [2022-01-18 17:44:08,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:08,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921218932] [2022-01-18 17:44:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921218932] [2022-01-18 17:44:08,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921218932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799328860] [2022-01-18 17:44:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:08,293 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) [2022-01-18 17:44:08,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 17:44:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:44:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799328860] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:08,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:44:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2022-01-18 17:44:08,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602039763] [2022-01-18 17:44:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:08,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:08,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:44:08,449 INFO L87 Difference]: Start difference. First operand 1077 states and 4061 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:08,510 INFO L93 Difference]: Finished difference Result 1792 states and 6625 transitions. [2022-01-18 17:44:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2022-01-18 17:44:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:08,519 INFO L225 Difference]: With dead ends: 1792 [2022-01-18 17:44:08,519 INFO L226 Difference]: Without dead ends: 1750 [2022-01-18 17:44:08,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:08,520 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:08,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 72 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-01-18 17:44:08,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1127. [2022-01-18 17:44:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.7886323268206037) internal successors, (4266), 1126 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 4266 transitions. [2022-01-18 17:44:08,551 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 4266 transitions. Word has length 25 [2022-01-18 17:44:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:08,551 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 4266 transitions. [2022-01-18 17:44:08,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 4266 transitions. [2022-01-18 17:44:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:44:08,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:08,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:08,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:08,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:08,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:08,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1454208321, now seen corresponding path program 3 times [2022-01-18 17:44:08,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:08,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677369269] [2022-01-18 17:44:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:08,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677369269] [2022-01-18 17:44:08,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677369269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:44:08,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:44:08,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:44:08,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129245876] [2022-01-18 17:44:08,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:08,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:08,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:44:08,802 INFO L87 Difference]: Start difference. First operand 1127 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:08,868 INFO L93 Difference]: Finished difference Result 1118 states and 4210 transitions. [2022-01-18 17:44:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 17:44:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2022-01-18 17:44:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:08,872 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 17:44:08,872 INFO L226 Difference]: Without dead ends: 938 [2022-01-18 17:44:08,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:08,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:08,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 69 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-18 17:44:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 858. [2022-01-18 17:44:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2022-01-18 17:44:08,919 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2022-01-18 17:44:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2022-01-18 17:44:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2022-01-18 17:44:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 17:44:08,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:08,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:08,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 17:44:08,922 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -149664725, now seen corresponding path program 1 times [2022-01-18 17:44:08,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:08,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250372850] [2022-01-18 17:44:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:08,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250372850] [2022-01-18 17:44:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250372850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805474352] [2022-01-18 17:44:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:08,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:08,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:08,946 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) [2022-01-18 17:44:08,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 17:44:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 17:44:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:09,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:09,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805474352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:09,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:09,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 17:44:09,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572677975] [2022-01-18 17:44:09,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:09,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 17:44:09,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 17:44:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 17:44:09,046 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-18 17:44:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:09,100 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2022-01-18 17:44:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 27 [2022-01-18 17:44:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:09,108 INFO L225 Difference]: With dead ends: 2765 [2022-01-18 17:44:09,108 INFO L226 Difference]: Without dead ends: 2631 [2022-01-18 17:44:09,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:44:09,108 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:09,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 111 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-18 17:44:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2022-01-18 17:44:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2022-01-18 17:44:09,152 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2022-01-18 17:44:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:09,153 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2022-01-18 17:44:09,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2022-01-18 17:44:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2022-01-18 17:44:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 17:44:09,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:09,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:09,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:09,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1329540183, now seen corresponding path program 2 times [2022-01-18 17:44:09,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108429533] [2022-01-18 17:44:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:09,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:44:09,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:09,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108429533] [2022-01-18 17:44:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108429533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418367431] [2022-01-18 17:44:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:09,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:09,410 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) [2022-01-18 17:44:09,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 17:44:09,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 17:44:09,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 17:44:09,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418367431] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:09,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 17:44:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 17:44:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852607962] [2022-01-18 17:44:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:44:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:44:09,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:44:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:44:09,617 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:09,672 INFO L93 Difference]: Finished difference Result 3007 states and 11629 transitions. [2022-01-18 17:44:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 17:44:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:09,682 INFO L225 Difference]: With dead ends: 3007 [2022-01-18 17:44:09,682 INFO L226 Difference]: Without dead ends: 3007 [2022-01-18 17:44:09,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:44:09,683 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:09,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:44:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-01-18 17:44:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2137. [2022-01-18 17:44:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2022-01-18 17:44:09,739 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2022-01-18 17:44:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2022-01-18 17:44:09,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2022-01-18 17:44:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 17:44:09,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:09,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:09,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 17:44:09,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 17:44:09,961 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -695147281, now seen corresponding path program 1 times [2022-01-18 17:44:09,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923467638] [2022-01-18 17:44:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:09,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:10,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923467638] [2022-01-18 17:44:10,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923467638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092998921] [2022-01-18 17:44:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:10,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:10,012 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) [2022-01-18 17:44:10,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 17:44:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:44:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:10,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092998921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:10,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:10,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 17:44:10,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336634464] [2022-01-18 17:44:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:10,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:44:10,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:44:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:44:10,159 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:10,229 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2022-01-18 17:44:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 17:44:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 17:44:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:10,237 INFO L225 Difference]: With dead ends: 2794 [2022-01-18 17:44:10,237 INFO L226 Difference]: Without dead ends: 2640 [2022-01-18 17:44:10,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:44:10,238 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:10,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 162 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-01-18 17:44:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2022-01-18 17:44:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2022-01-18 17:44:10,274 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2022-01-18 17:44:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:10,274 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2022-01-18 17:44:10,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2022-01-18 17:44:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 17:44:10,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:10,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:10,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:10,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:10,494 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1929157723, now seen corresponding path program 2 times [2022-01-18 17:44:10,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:10,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809836017] [2022-01-18 17:44:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:10,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:10,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809836017] [2022-01-18 17:44:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809836017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519008868] [2022-01-18 17:44:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:10,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:10,556 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) [2022-01-18 17:44:10,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 17:44:10,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 17:44:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:10,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519008868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:10,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:10,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-01-18 17:44:10,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30206208] [2022-01-18 17:44:10,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:10,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 17:44:10,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 17:44:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:44:10,751 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:10,856 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2022-01-18 17:44:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 17:44:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 17:44:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:10,871 INFO L225 Difference]: With dead ends: 5257 [2022-01-18 17:44:10,871 INFO L226 Difference]: Without dead ends: 4937 [2022-01-18 17:44:10,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:44:10,872 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 113 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:10,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 212 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-01-18 17:44:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2022-01-18 17:44:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2022-01-18 17:44:10,943 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2022-01-18 17:44:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:10,944 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2022-01-18 17:44:10,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2022-01-18 17:44:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:10,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:10,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:11,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:11,183 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -638022169, now seen corresponding path program 3 times [2022-01-18 17:44:11,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:11,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076600638] [2022-01-18 17:44:11,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:11,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:11,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076600638] [2022-01-18 17:44:11,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076600638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750569088] [2022-01-18 17:44:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:11,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:11,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:11,232 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) [2022-01-18 17:44:11,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 17:44:11,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:11,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:11,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:11,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:11,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750569088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:11,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:11,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-01-18 17:44:11,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305451210] [2022-01-18 17:44:11,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:11,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:44:11,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:44:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:44:11,407 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:12,286 INFO L93 Difference]: Finished difference Result 13022 states and 49751 transitions. [2022-01-18 17:44:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:44:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:12,329 INFO L225 Difference]: With dead ends: 13022 [2022-01-18 17:44:12,329 INFO L226 Difference]: Without dead ends: 12499 [2022-01-18 17:44:12,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=2717, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:44:12,330 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 675 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:12,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 326 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2022-01-18 17:44:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 5776. [2022-01-18 17:44:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2022-01-18 17:44:12,533 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2022-01-18 17:44:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:12,533 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2022-01-18 17:44:12,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2022-01-18 17:44:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:12,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:12,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:12,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:12,761 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,SelfDestructingSolverStorable15 [2022-01-18 17:44:12,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:12,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -871799379, now seen corresponding path program 4 times [2022-01-18 17:44:12,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381677858] [2022-01-18 17:44:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:12,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:12,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381677858] [2022-01-18 17:44:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381677858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830237802] [2022-01-18 17:44:12,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:12,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:12,798 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) [2022-01-18 17:44:12,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 17:44:12,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:12,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:12,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:12,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:13,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830237802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:13,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:13,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 17:44:13,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693520550] [2022-01-18 17:44:13,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:13,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:44:13,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:44:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:44:13,004 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2022-01-18 17:44:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:13,205 INFO L93 Difference]: Finished difference Result 13141 states and 52344 transitions. [2022-01-18 17:44:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:44:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:13,241 INFO L225 Difference]: With dead ends: 13141 [2022-01-18 17:44:13,241 INFO L226 Difference]: Without dead ends: 12241 [2022-01-18 17:44:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:44:13,241 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 229 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:13,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 162 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2022-01-18 17:44:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 8849. [2022-01-18 17:44:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2022-01-18 17:44:13,491 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2022-01-18 17:44:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:13,492 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2022-01-18 17:44:13,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2022-01-18 17:44:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2022-01-18 17:44:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:13,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:13,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:13,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 17:44:13,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 17:44:13,711 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 325420737, now seen corresponding path program 5 times [2022-01-18 17:44:13,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351468671] [2022-01-18 17:44:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:13,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:13,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351468671] [2022-01-18 17:44:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351468671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379920337] [2022-01-18 17:44:13,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:13,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:13,755 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) [2022-01-18 17:44:13,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 17:44:13,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:44:13,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:13,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:13,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379920337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:13,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:13,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 17:44:13,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162725790] [2022-01-18 17:44:13,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:44:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:44:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:13,977 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:14,437 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2022-01-18 17:44:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:44:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:14,514 INFO L225 Difference]: With dead ends: 24527 [2022-01-18 17:44:14,514 INFO L226 Difference]: Without dead ends: 24223 [2022-01-18 17:44:14,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:44:14,515 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 483 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:14,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 191 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2022-01-18 17:44:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2022-01-18 17:44:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2022-01-18 17:44:14,997 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2022-01-18 17:44:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:14,997 INFO L470 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2022-01-18 17:44:14,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2022-01-18 17:44:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:15,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:15,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:15,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:15,344 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,SelfDestructingSolverStorable17 [2022-01-18 17:44:15,344 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash -132626495, now seen corresponding path program 6 times [2022-01-18 17:44:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774657064] [2022-01-18 17:44:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:15,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:15,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:15,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774657064] [2022-01-18 17:44:15,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774657064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:15,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556338916] [2022-01-18 17:44:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:15,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:15,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:15,465 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) [2022-01-18 17:44:15,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 17:44:15,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:15,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:15,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:44:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:15,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556338916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:15,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:15,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-18 17:44:15,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137162471] [2022-01-18 17:44:15,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:15,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:44:15,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:44:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:44:15,718 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:16,773 INFO L93 Difference]: Finished difference Result 66695 states and 282227 transitions. [2022-01-18 17:44:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:44:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:17,230 INFO L225 Difference]: With dead ends: 66695 [2022-01-18 17:44:17,230 INFO L226 Difference]: Without dead ends: 65385 [2022-01-18 17:44:17,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:44:17,231 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 667 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:17,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 174 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65385 states. [2022-01-18 17:44:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65385 to 33143. [2022-01-18 17:44:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2022-01-18 17:44:18,660 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2022-01-18 17:44:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:18,661 INFO L470 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2022-01-18 17:44:18,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2022-01-18 17:44:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:18,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:18,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:18,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:19,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:19,107 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1854514437, now seen corresponding path program 7 times [2022-01-18 17:44:19,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985088084] [2022-01-18 17:44:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:19,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:19,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985088084] [2022-01-18 17:44:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985088084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:19,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489504360] [2022-01-18 17:44:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:19,176 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) [2022-01-18 17:44:19,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 17:44:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:19,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:44:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:19,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:19,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489504360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:19,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:19,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 17:44:19,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810220986] [2022-01-18 17:44:19,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:19,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:19,395 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:20,020 INFO L93 Difference]: Finished difference Result 48619 states and 218179 transitions. [2022-01-18 17:44:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 17:44:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:20,330 INFO L225 Difference]: With dead ends: 48619 [2022-01-18 17:44:20,330 INFO L226 Difference]: Without dead ends: 48487 [2022-01-18 17:44:20,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:44:20,331 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 262 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:20,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 218 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48487 states. [2022-01-18 17:44:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48487 to 33850. [2022-01-18 17:44:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2022-01-18 17:44:21,535 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2022-01-18 17:44:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:21,536 INFO L470 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2022-01-18 17:44:21,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2022-01-18 17:44:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:21,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:21,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:21,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:21,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:21,824 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -670266441, now seen corresponding path program 8 times [2022-01-18 17:44:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:21,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108509743] [2022-01-18 17:44:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:21,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:21,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108509743] [2022-01-18 17:44:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108509743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085097595] [2022-01-18 17:44:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:44:21,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:21,891 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) [2022-01-18 17:44:21,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 17:44:21,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:44:21,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:22,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085097595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:22,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-18 17:44:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328283603] [2022-01-18 17:44:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:44:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:44:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:44:22,108 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:24,019 INFO L93 Difference]: Finished difference Result 83302 states and 345101 transitions. [2022-01-18 17:44:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 17:44:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:24,591 INFO L225 Difference]: With dead ends: 83302 [2022-01-18 17:44:24,591 INFO L226 Difference]: Without dead ends: 81495 [2022-01-18 17:44:24,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:44:24,593 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 855 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:24,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 371 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:44:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81495 states. [2022-01-18 17:44:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81495 to 32872. [2022-01-18 17:44:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2022-01-18 17:44:26,213 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2022-01-18 17:44:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2022-01-18 17:44:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2022-01-18 17:44:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 17:44:26,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:26,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:26,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:26,514 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,SelfDestructingSolverStorable20 [2022-01-18 17:44:26,514 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 135314879, now seen corresponding path program 9 times [2022-01-18 17:44:26,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:26,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837674053] [2022-01-18 17:44:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:26,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:26,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837674053] [2022-01-18 17:44:26,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837674053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982566922] [2022-01-18 17:44:26,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:44:26,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:26,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:26,549 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) [2022-01-18 17:44:26,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 17:44:26,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:44:26,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:26,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:26,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982566922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:26,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:26,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 17:44:26,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764125176] [2022-01-18 17:44:26,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:26,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:26,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:26,775 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:27,857 INFO L93 Difference]: Finished difference Result 59892 states and 264687 transitions. [2022-01-18 17:44:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:44:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 17:44:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:28,111 INFO L225 Difference]: With dead ends: 59892 [2022-01-18 17:44:28,111 INFO L226 Difference]: Without dead ends: 59562 [2022-01-18 17:44:28,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1320, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:44:28,111 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 503 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:28,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 271 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59562 states. [2022-01-18 17:44:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59562 to 32800. [2022-01-18 17:44:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2022-01-18 17:44:29,178 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2022-01-18 17:44:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:29,178 INFO L470 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2022-01-18 17:44:29,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2022-01-18 17:44:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 17:44:29,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:29,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:29,458 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forcibly destroying the process [2022-01-18 17:44:29,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:29,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:29,463 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash -917380623, now seen corresponding path program 10 times [2022-01-18 17:44:29,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:29,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070953944] [2022-01-18 17:44:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:29,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:29,467 WARN L724 oredProcess$PipePump]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] The stream was forcibly closed: stdIn [2022-01-18 17:44:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070953944] [2022-01-18 17:44:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070953944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499932564] [2022-01-18 17:44:29,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:44:29,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:29,536 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) [2022-01-18 17:44:29,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 17:44:29,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:44:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:44:29,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499932564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:29,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:29,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 17:44:29,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973767808] [2022-01-18 17:44:29,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:29,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:44:29,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:44:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:44:29,729 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:30,225 INFO L93 Difference]: Finished difference Result 52086 states and 238055 transitions. [2022-01-18 17:44:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:44:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 17:44:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:30,462 INFO L225 Difference]: With dead ends: 52086 [2022-01-18 17:44:30,463 INFO L226 Difference]: Without dead ends: 51911 [2022-01-18 17:44:30,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:44:30,463 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:30,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 192 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:44:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51911 states. [2022-01-18 17:44:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51911 to 44066. [2022-01-18 17:44:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2022-01-18 17:44:31,972 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2022-01-18 17:44:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:31,972 INFO L470 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2022-01-18 17:44:31,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2022-01-18 17:44:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 17:44:32,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:32,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:32,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:32,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:32,278 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1712141219, now seen corresponding path program 11 times [2022-01-18 17:44:32,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:32,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526016031] [2022-01-18 17:44:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:32,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:32,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526016031] [2022-01-18 17:44:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526016031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306796975] [2022-01-18 17:44:32,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:44:32,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:32,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:32,324 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) [2022-01-18 17:44:32,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 17:44:32,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:44:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:44:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:32,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:44:32,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306796975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:32,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:32,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 17:44:32,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157311583] [2022-01-18 17:44:32,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:32,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:32,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:32,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:32,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:32,523 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:34,438 INFO L93 Difference]: Finished difference Result 144748 states and 644596 transitions. [2022-01-18 17:44:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:44:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 17:44:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:35,574 INFO L225 Difference]: With dead ends: 144748 [2022-01-18 17:44:35,574 INFO L226 Difference]: Without dead ends: 143934 [2022-01-18 17:44:35,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:44:35,575 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:35,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 360 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143934 states. [2022-01-18 17:44:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143934 to 81343. [2022-01-18 17:44:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81343 states, 81342 states have (on average 4.821174792849942) internal successors, (392164), 81342 states have internal predecessors, (392164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81343 states to 81343 states and 392164 transitions. [2022-01-18 17:44:39,209 INFO L78 Accepts]: Start accepts. Automaton has 81343 states and 392164 transitions. Word has length 33 [2022-01-18 17:44:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 81343 states and 392164 transitions. [2022-01-18 17:44:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 81343 states and 392164 transitions. [2022-01-18 17:44:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 17:44:39,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:39,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:39,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:39,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 17:44:39,618 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1370285983, now seen corresponding path program 12 times [2022-01-18 17:44:39,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:39,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344013406] [2022-01-18 17:44:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:39,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:40,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344013406] [2022-01-18 17:44:40,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344013406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983244614] [2022-01-18 17:44:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:44:40,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:40,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:40,056 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) [2022-01-18 17:44:40,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 17:44:40,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:44:40,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:44:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:44:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:40,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:44:40,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983244614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:40,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:40,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 17:44:40,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699642993] [2022-01-18 17:44:40,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:40,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:44:40,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:44:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:44:40,254 INFO L87 Difference]: Start difference. First operand 81343 states and 392164 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:42,468 INFO L93 Difference]: Finished difference Result 162029 states and 737624 transitions. [2022-01-18 17:44:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:44:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 17:44:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:43,289 INFO L225 Difference]: With dead ends: 162029 [2022-01-18 17:44:43,289 INFO L226 Difference]: Without dead ends: 161582 [2022-01-18 17:44:43,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:44:43,290 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 444 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:43,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 338 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:44:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161582 states. [2022-01-18 17:44:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161582 to 110132. [2022-01-18 17:44:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110132 states, 110131 states have (on average 4.7964878190518565) internal successors, (528242), 110131 states have internal predecessors, (528242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110132 states to 110132 states and 528242 transitions. [2022-01-18 17:44:47,917 INFO L78 Accepts]: Start accepts. Automaton has 110132 states and 528242 transitions. Word has length 33 [2022-01-18 17:44:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:44:47,918 INFO L470 AbstractCegarLoop]: Abstraction has 110132 states and 528242 transitions. [2022-01-18 17:44:47,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 110132 states and 528242 transitions. [2022-01-18 17:44:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:44:48,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:44:48,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:44:48,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 17:44:48,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:48,433 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:44:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:44:48,433 INFO L85 PathProgramCache]: Analyzing trace with hash 707900697, now seen corresponding path program 13 times [2022-01-18 17:44:48,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:44:48,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709219256] [2022-01-18 17:44:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:44:48,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:44:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:44:48,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:44:48,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709219256] [2022-01-18 17:44:48,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709219256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:44:48,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079891576] [2022-01-18 17:44:48,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:44:48,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:44:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:44:48,485 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) [2022-01-18 17:44:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 17:44:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:44:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:44:48,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:44:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:44:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:44:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079891576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:44:48,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:44:48,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-18 17:44:48,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564986250] [2022-01-18 17:44:48,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:44:48,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:44:48,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:44:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:44:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:44:48,623 INFO L87 Difference]: Start difference. First operand 110132 states and 528242 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:44:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:44:51,419 INFO L93 Difference]: Finished difference Result 232640 states and 1102907 transitions. [2022-01-18 17:44:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:44:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 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 35 [2022-01-18 17:44:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:44:53,278 INFO L225 Difference]: With dead ends: 232640 [2022-01-18 17:44:53,279 INFO L226 Difference]: Without dead ends: 231487 [2022-01-18 17:44:53,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:44:53,279 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 317 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:44:53,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 209 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:44:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231487 states. [2022-01-18 17:44:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231487 to 217570. [2022-01-18 17:44:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217570 states, 217569 states have (on average 4.7864263750810085) internal successors, (1041378), 217569 states have internal predecessors, (1041378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217570 states to 217570 states and 1041378 transitions. [2022-01-18 17:45:01,924 INFO L78 Accepts]: Start accepts. Automaton has 217570 states and 1041378 transitions. Word has length 35 [2022-01-18 17:45:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 217570 states and 1041378 transitions. [2022-01-18 17:45:01,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 217570 states and 1041378 transitions. [2022-01-18 17:45:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:45:02,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:02,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:02,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:45:02,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:02,859 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:45:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1721346381, now seen corresponding path program 14 times [2022-01-18 17:45:02,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:02,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368370846] [2022-01-18 17:45:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:02,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:45:02,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368370846] [2022-01-18 17:45:02,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368370846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540241221] [2022-01-18 17:45:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:45:02,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:02,898 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) [2022-01-18 17:45:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 17:45:02,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:45:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:45:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 17:45:03,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:45:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540241221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:03,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:03,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 17:45:03,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815788113] [2022-01-18 17:45:03,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:03,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:45:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:45:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:45:03,122 INFO L87 Difference]: Start difference. First operand 217570 states and 1041378 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 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) [2022-01-18 17:45:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:12,007 INFO L93 Difference]: Finished difference Result 665622 states and 3017455 transitions. [2022-01-18 17:45:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 17:45:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 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) Word has length 35 [2022-01-18 17:45:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:17,148 INFO L225 Difference]: With dead ends: 665622 [2022-01-18 17:45:17,148 INFO L226 Difference]: Without dead ends: 663051 [2022-01-18 17:45:17,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1495, Invalid=5815, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:45:17,150 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1085 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:17,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 392 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:45:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663051 states. [2022-01-18 17:45:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663051 to 429202. [2022-01-18 17:45:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429202 states, 429201 states have (on average 4.839436534397636) internal successors, (2077091), 429201 states have internal predecessors, (2077091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429202 states to 429202 states and 2077091 transitions. [2022-01-18 17:45:43,168 INFO L78 Accepts]: Start accepts. Automaton has 429202 states and 2077091 transitions. Word has length 35 [2022-01-18 17:45:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:45:43,168 INFO L470 AbstractCegarLoop]: Abstraction has 429202 states and 2077091 transitions. [2022-01-18 17:45:43,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 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) [2022-01-18 17:45:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 429202 states and 2077091 transitions. [2022-01-18 17:45:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:45:46,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:45:46,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:45:46,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 17:45:46,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:46,675 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:45:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:45:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1329498949, now seen corresponding path program 15 times [2022-01-18 17:45:46,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:45:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804315514] [2022-01-18 17:45:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:45:46,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:45:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:45:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:45:46,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:45:46,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804315514] [2022-01-18 17:45:46,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804315514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:45:46,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733893234] [2022-01-18 17:45:46,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:45:46,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:45:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:45:46,779 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) [2022-01-18 17:45:46,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 17:45:46,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:45:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:45:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:45:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:45:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:45:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:45:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:45:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733893234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:45:47,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:45:47,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-01-18 17:45:47,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483968769] [2022-01-18 17:45:47,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:45:47,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:45:47,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:45:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:45:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:45:47,068 INFO L87 Difference]: Start difference. First operand 429202 states and 2077091 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:45:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:45:52,702 INFO L93 Difference]: Finished difference Result 455471 states and 2171017 transitions. [2022-01-18 17:45:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 17:45:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 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 35 [2022-01-18 17:45:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:45:56,433 INFO L225 Difference]: With dead ends: 455471 [2022-01-18 17:45:56,433 INFO L226 Difference]: Without dead ends: 454320 [2022-01-18 17:45:56,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:45:56,434 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:45:56,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 162 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:45:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454320 states. [2022-01-18 17:46:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454320 to 401530. [2022-01-18 17:46:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401530 states, 401529 states have (on average 4.856503515312717) internal successors, (1950027), 401529 states have internal predecessors, (1950027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401530 states to 401530 states and 1950027 transitions. [2022-01-18 17:46:13,452 INFO L78 Accepts]: Start accepts. Automaton has 401530 states and 1950027 transitions. Word has length 35 [2022-01-18 17:46:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:13,452 INFO L470 AbstractCegarLoop]: Abstraction has 401530 states and 1950027 transitions. [2022-01-18 17:46:13,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 401530 states and 1950027 transitions. [2022-01-18 17:46:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:46:15,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:46:15,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:46:15,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 17:46:15,804 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,SelfDestructingSolverStorable27 [2022-01-18 17:46:15,804 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:46:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:46:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -923485257, now seen corresponding path program 16 times [2022-01-18 17:46:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:46:15,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049287356] [2022-01-18 17:46:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:46:15,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:46:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:46:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:46:15,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:46:15,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049287356] [2022-01-18 17:46:15,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049287356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:46:15,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305257507] [2022-01-18 17:46:15,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:46:15,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:46:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:46:15,908 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) [2022-01-18 17:46:15,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 17:46:15,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:46:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:46:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:46:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:46:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 17:46:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:46:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:46:16,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305257507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:46:16,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:46:16,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 17:46:16,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917622403] [2022-01-18 17:46:16,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:46:16,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:46:16,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:46:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:46:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:46:16,172 INFO L87 Difference]: Start difference. First operand 401530 states and 1950027 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:46:25,732 INFO L93 Difference]: Finished difference Result 587552 states and 2801184 transitions. [2022-01-18 17:46:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:46:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 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 35 [2022-01-18 17:46:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:46:32,387 INFO L225 Difference]: With dead ends: 587552 [2022-01-18 17:46:32,388 INFO L226 Difference]: Without dead ends: 583480 [2022-01-18 17:46:32,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:46:32,388 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 339 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:46:32,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 143 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:46:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583480 states. [2022-01-18 17:46:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583480 to 503491. [2022-01-18 17:46:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503491 states, 503490 states have (on average 4.88280402788536) internal successors, (2458443), 503490 states have internal predecessors, (2458443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503491 states to 503491 states and 2458443 transitions. [2022-01-18 17:46:59,658 INFO L78 Accepts]: Start accepts. Automaton has 503491 states and 2458443 transitions. Word has length 35 [2022-01-18 17:46:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:46:59,658 INFO L470 AbstractCegarLoop]: Abstraction has 503491 states and 2458443 transitions. [2022-01-18 17:46:59,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:46:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 503491 states and 2458443 transitions. [2022-01-18 17:47:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:47:03,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:47:03,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:47:03,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:47:03,399 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,SelfDestructingSolverStorable28 [2022-01-18 17:47:03,399 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:47:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:47:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2027409861, now seen corresponding path program 17 times [2022-01-18 17:47:03,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:47:03,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755137366] [2022-01-18 17:47:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:47:03,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:47:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:47:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:47:03,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:47:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755137366] [2022-01-18 17:47:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755137366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:47:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197007358] [2022-01-18 17:47:03,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:47:03,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:47:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:47:03,433 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) [2022-01-18 17:47:03,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 17:47:03,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:47:03,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:47:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:47:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:47:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:47:03,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:47:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:47:03,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197007358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:47:03,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:47:03,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2022-01-18 17:47:03,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994726300] [2022-01-18 17:47:03,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:47:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:47:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:47:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:47:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:47:03,686 INFO L87 Difference]: Start difference. First operand 503491 states and 2458443 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:47:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:47:14,371 INFO L93 Difference]: Finished difference Result 882190 states and 4102264 transitions. [2022-01-18 17:47:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:47:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 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 35 [2022-01-18 17:47:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:47:26,251 INFO L225 Difference]: With dead ends: 882190 [2022-01-18 17:47:26,251 INFO L226 Difference]: Without dead ends: 865498 [2022-01-18 17:47:26,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=504, Invalid=1388, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:47:26,253 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 651 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:47:26,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 292 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:47:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865498 states. [2022-01-18 17:47:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865498 to 652930. [2022-01-18 17:47:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652930 states, 652929 states have (on average 4.884675056552856) internal successors, (3189346), 652929 states have internal predecessors, (3189346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652930 states to 652930 states and 3189346 transitions. [2022-01-18 17:48:03,524 INFO L78 Accepts]: Start accepts. Automaton has 652930 states and 3189346 transitions. Word has length 35 [2022-01-18 17:48:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:48:03,524 INFO L470 AbstractCegarLoop]: Abstraction has 652930 states and 3189346 transitions. [2022-01-18 17:48:03,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 652930 states and 3189346 transitions. [2022-01-18 17:48:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:48:07,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:48:07,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:48:07,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 17:48:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:07,983 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:48:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:48:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1179768517, now seen corresponding path program 18 times [2022-01-18 17:48:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:48:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016224772] [2022-01-18 17:48:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:48:07,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:48:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:48:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:48:08,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:48:08,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016224772] [2022-01-18 17:48:08,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016224772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:48:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763420765] [2022-01-18 17:48:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:48:08,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:48:08,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:48:08,036 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) [2022-01-18 17:48:08,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 17:48:08,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:48:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:48:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:48:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:48:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:48:08,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:48:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:48:09,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763420765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:48:09,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:48:09,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2022-01-18 17:48:09,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503105642] [2022-01-18 17:48:09,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:48:09,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:48:09,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:48:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:48:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:48:09,009 INFO L87 Difference]: Start difference. First operand 652930 states and 3189346 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:48:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:48:20,860 INFO L93 Difference]: Finished difference Result 850757 states and 4076963 transitions. [2022-01-18 17:48:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:48:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 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 35 [2022-01-18 17:48:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:48:28,509 INFO L225 Difference]: With dead ends: 850757 [2022-01-18 17:48:28,509 INFO L226 Difference]: Without dead ends: 850426 [2022-01-18 17:48:28,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=667, Invalid=2195, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:48:28,510 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 737 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:48:28,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 332 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:48:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850426 states. [2022-01-18 17:48:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850426 to 662345. [2022-01-18 17:48:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662345 states, 662344 states have (on average 4.8847456910608384) internal successors, (3235382), 662344 states have internal predecessors, (3235382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662345 states to 662345 states and 3235382 transitions. [2022-01-18 17:49:03,458 INFO L78 Accepts]: Start accepts. Automaton has 662345 states and 3235382 transitions. Word has length 35 [2022-01-18 17:49:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:49:03,459 INFO L470 AbstractCegarLoop]: Abstraction has 662345 states and 3235382 transitions. [2022-01-18 17:49:03,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:49:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 662345 states and 3235382 transitions. [2022-01-18 17:49:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 17:49:07,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:49:07,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:49:07,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:49:08,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:08,152 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 17:49:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:49:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1215150113, now seen corresponding path program 19 times [2022-01-18 17:49:08,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:49:08,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266469863] [2022-01-18 17:49:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:49:08,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:49:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:49:08,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:49:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266469863] [2022-01-18 17:49:08,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266469863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:49:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719827120] [2022-01-18 17:49:08,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:49:08,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:49:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:49:08,237 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) [2022-01-18 17:49:08,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 17:49:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:49:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 17:49:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:49:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:49:08,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:49:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:49:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719827120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:49:08,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:49:08,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 17:49:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170088321] [2022-01-18 17:49:08,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:49:08,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:49:08,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:49:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:49:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:49:08,474 INFO L87 Difference]: Start difference. First operand 662345 states and 3235382 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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)