/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:12:52,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:12:52,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:12:52,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:12:52,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:12:52,691 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:12:52,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:12:52,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:12:52,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:12:52,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:12:52,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:12:52,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:12:52,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:12:52,693 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:12:52,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:12:52,693 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:12:52,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:12:52,695 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:12:52,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:12:52,695 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:12:52,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:12:52,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:12:52,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:12:52,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:12:52,697 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:12:52,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:12:52,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:12:52,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:12:52,928 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:12:52,931 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:12:52,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label27.c [2023-04-01 23:12:54,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:12:54,426 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:12:54,427 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label27.c [2023-04-01 23:12:54,444 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e0ad53f4/2fb63d0f98b742eda006993f15a99440/FLAG3d0787d0a [2023-04-01 23:12:54,464 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e0ad53f4/2fb63d0f98b742eda006993f15a99440 [2023-04-01 23:12:54,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:12:54,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:12:54,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:12:54,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:12:54,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:12:54,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:12:54" (1/1) ... [2023-04-01 23:12:54,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260c042c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:54, skipping insertion in model container [2023-04-01 23:12:54,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:12:54" (1/1) ... [2023-04-01 23:12:54,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:12:54,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:12:54,716 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label27.c[1550,1563] [2023-04-01 23:12:55,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:12:55,105 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:12:55,117 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label27.c[1550,1563] [2023-04-01 23:12:55,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:12:55,393 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:12:55,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55 WrapperNode [2023-04-01 23:12:55,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:12:55,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:12:55,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:12:55,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:12:55,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:12:55,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:12:55,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:12:55,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:12:55,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (1/1) ... [2023-04-01 23:12:55,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:12:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:12:55,579 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) [2023-04-01 23:12:55,605 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 [2023-04-01 23:12:55,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:12:55,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:12:55,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:12:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:12:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:12:55,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:12:55,625 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:12:55,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:12:55,698 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:12:55,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:12:57,413 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:12:57,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:12:57,428 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:12:57,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:12:57 BoogieIcfgContainer [2023-04-01 23:12:57,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:12:57,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:12:57,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:12:57,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:12:57,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:12:54" (1/3) ... [2023-04-01 23:12:57,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b725690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:12:57, skipping insertion in model container [2023-04-01 23:12:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:55" (2/3) ... [2023-04-01 23:12:57,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b725690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:12:57, skipping insertion in model container [2023-04-01 23:12:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:12:57" (3/3) ... [2023-04-01 23:12:57,440 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label27.c [2023-04-01 23:12:57,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:12:57,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:12:57,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:12:57,533 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16be526e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:12:57,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:12:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:12:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 23:12:57,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:12:57,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:12:57,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:12:57,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:12:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash -689059439, now seen corresponding path program 1 times [2023-04-01 23:12:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:12:57,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87053720] [2023-04-01 23:12:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:12:57,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:12:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:12:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:12:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:12:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:12:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:12:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87053720] [2023-04-01 23:12:58,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87053720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:12:58,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:12:58,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:12:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801644086] [2023-04-01 23:12:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:12:58,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:12:58,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:12:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:12:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:12:58,068 INFO L87 Difference]: Start difference. First operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:13:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:00,370 INFO L93 Difference]: Finished difference Result 1184 states and 2180 transitions. [2023-04-01 23:13:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:13:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 23:13:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:00,387 INFO L225 Difference]: With dead ends: 1184 [2023-04-01 23:13:00,387 INFO L226 Difference]: Without dead ends: 696 [2023-04-01 23:13:00,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:13:00,398 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:00,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 32 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 23:13:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2023-04-01 23:13:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 689. [2023-04-01 23:13:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 674 states have (on average 1.7492581602373887) internal successors, (1179), 676 states have internal predecessors, (1179), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 23:13:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1197 transitions. [2023-04-01 23:13:00,474 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1197 transitions. Word has length 18 [2023-04-01 23:13:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:00,474 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 1197 transitions. [2023-04-01 23:13:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:13:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1197 transitions. [2023-04-01 23:13:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 23:13:00,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:00,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:13:00,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:00,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash -99185057, now seen corresponding path program 1 times [2023-04-01 23:13:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:00,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375027712] [2023-04-01 23:13:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:00,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:00,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:13:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:00,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375027712] [2023-04-01 23:13:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375027712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:00,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:13:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:13:00,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796835907] [2023-04-01 23:13:00,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:13:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:13:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:13:00,806 INFO L87 Difference]: Start difference. First operand 689 states and 1197 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:03,345 INFO L93 Difference]: Finished difference Result 2091 states and 3681 transitions. [2023-04-01 23:13:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:13:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2023-04-01 23:13:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:03,356 INFO L225 Difference]: With dead ends: 2091 [2023-04-01 23:13:03,356 INFO L226 Difference]: Without dead ends: 1408 [2023-04-01 23:13:03,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:13:03,365 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1812 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:03,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 65 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 23:13:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-04-01 23:13:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1384. [2023-04-01 23:13:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1352 states have (on average 1.6494082840236686) internal successors, (2230), 1360 states have internal predecessors, (2230), 10 states have call successors, (10), 10 states have call predecessors, (10), 21 states have return successors, (48), 13 states have call predecessors, (48), 9 states have call successors, (48) [2023-04-01 23:13:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2023-04-01 23:13:03,451 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 87 [2023-04-01 23:13:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:03,451 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2023-04-01 23:13:03,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2023-04-01 23:13:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 23:13:03,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:03,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:03,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:13:03,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:03,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 731499576, now seen corresponding path program 1 times [2023-04-01 23:13:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:03,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620305945] [2023-04-01 23:13:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:13:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620305945] [2023-04-01 23:13:03,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620305945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:03,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:13:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:13:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475878601] [2023-04-01 23:13:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:13:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:13:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:13:03,726 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:06,062 INFO L93 Difference]: Finished difference Result 3489 states and 5782 transitions. [2023-04-01 23:13:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:13:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2023-04-01 23:13:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:06,074 INFO L225 Difference]: With dead ends: 3489 [2023-04-01 23:13:06,074 INFO L226 Difference]: Without dead ends: 2111 [2023-04-01 23:13:06,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:13:06,085 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1338 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:06,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 62 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 23:13:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2023-04-01 23:13:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2087. [2023-04-01 23:13:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2035 states have (on average 1.3493857493857493) internal successors, (2746), 2050 states have internal predecessors, (2746), 14 states have call successors, (14), 14 states have call predecessors, (14), 37 states have return successors, (88), 22 states have call predecessors, (88), 13 states have call successors, (88) [2023-04-01 23:13:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 2848 transitions. [2023-04-01 23:13:06,161 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 2848 transitions. Word has length 90 [2023-04-01 23:13:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:06,161 INFO L495 AbstractCegarLoop]: Abstraction has 2087 states and 2848 transitions. [2023-04-01 23:13:06,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 2848 transitions. [2023-04-01 23:13:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 23:13:06,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:06,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:13:06,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:06,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1940474608, now seen corresponding path program 1 times [2023-04-01 23:13:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28974902] [2023-04-01 23:13:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:06,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:13:06,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:06,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28974902] [2023-04-01 23:13:06,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28974902] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:06,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:13:06,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:13:06,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455551493] [2023-04-01 23:13:06,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:06,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:13:06,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:06,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:13:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:13:06,471 INFO L87 Difference]: Start difference. First operand 2087 states and 2848 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:10,528 INFO L93 Difference]: Finished difference Result 8341 states and 11788 transitions. [2023-04-01 23:13:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 23:13:10,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-04-01 23:13:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:10,554 INFO L225 Difference]: With dead ends: 8341 [2023-04-01 23:13:10,555 INFO L226 Difference]: Without dead ends: 6260 [2023-04-01 23:13:10,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:13:10,564 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1428 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4464 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 4985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:10,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1428 Valid, 67 Invalid, 4985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4464 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 23:13:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2023-04-01 23:13:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6248. [2023-04-01 23:13:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6095 states have (on average 1.2554552912223134) internal successors, (7652), 6152 states have internal predecessors, (7652), 38 states have call successors, (38), 38 states have call predecessors, (38), 114 states have return successors, (524), 57 states have call predecessors, (524), 37 states have call successors, (524) [2023-04-01 23:13:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 8214 transitions. [2023-04-01 23:13:10,729 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 8214 transitions. Word has length 94 [2023-04-01 23:13:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:10,730 INFO L495 AbstractCegarLoop]: Abstraction has 6248 states and 8214 transitions. [2023-04-01 23:13:10,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:13:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 8214 transitions. [2023-04-01 23:13:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 23:13:10,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:10,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:10,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 23:13:10,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:10,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1915903168, now seen corresponding path program 1 times [2023-04-01 23:13:10,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:10,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319871635] [2023-04-01 23:13:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:10,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:10,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:10,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 23:13:11,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:11,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319871635] [2023-04-01 23:13:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319871635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931965581] [2023-04-01 23:13:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:11,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:11,043 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) [2023-04-01 23:13:11,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:13:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:11,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:11,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:13:11,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:13:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931965581] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:11,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:13:11,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-04-01 23:13:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217271609] [2023-04-01 23:13:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:11,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:13:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:13:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:13:11,287 INFO L87 Difference]: Start difference. First operand 6248 states and 8214 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:13:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:12,473 INFO L93 Difference]: Finished difference Result 7935 states and 10184 transitions. [2023-04-01 23:13:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:13:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2023-04-01 23:13:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:12,507 INFO L225 Difference]: With dead ends: 7935 [2023-04-01 23:13:12,508 INFO L226 Difference]: Without dead ends: 7933 [2023-04-01 23:13:12,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:13:12,512 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 351 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:12,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 184 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:13:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2023-04-01 23:13:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 6585. [2023-04-01 23:13:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6585 states, 6428 states have (on average 1.2504667081518357) internal successors, (8038), 6485 states have internal predecessors, (8038), 40 states have call successors, (40), 40 states have call predecessors, (40), 116 states have return successors, (544), 59 states have call predecessors, (544), 39 states have call successors, (544) [2023-04-01 23:13:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6585 states to 6585 states and 8622 transitions. [2023-04-01 23:13:12,717 INFO L78 Accepts]: Start accepts. Automaton has 6585 states and 8622 transitions. Word has length 118 [2023-04-01 23:13:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:12,718 INFO L495 AbstractCegarLoop]: Abstraction has 6585 states and 8622 transitions. [2023-04-01 23:13:12,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:13:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6585 states and 8622 transitions. [2023-04-01 23:13:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-04-01 23:13:12,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:12,729 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-04-01 23:13:12,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:12,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:12,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:12,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:12,943 INFO L85 PathProgramCache]: Analyzing trace with hash -999939012, now seen corresponding path program 1 times [2023-04-01 23:13:12,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140256554] [2023-04-01 23:13:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:13,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:13,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 23:13:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:14,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2023-04-01 23:13:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 134 proven. 114 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 23:13:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140256554] [2023-04-01 23:13:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140256554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394129845] [2023-04-01 23:13:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:14,139 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) [2023-04-01 23:13:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:13:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:14,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:14,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 249 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 23:13:14,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:13:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 249 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 23:13:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394129845] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:13:14,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:13:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:13:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928978094] [2023-04-01 23:13:14,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:13:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:13:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:13:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:13:14,918 INFO L87 Difference]: Start difference. First operand 6585 states and 8622 transitions. Second operand has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 12 states have internal predecessors, (507), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:13:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:21,958 INFO L93 Difference]: Finished difference Result 17998 states and 24041 transitions. [2023-04-01 23:13:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 23:13:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 12 states have internal predecessors, (507), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 362 [2023-04-01 23:13:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:22,007 INFO L225 Difference]: With dead ends: 17998 [2023-04-01 23:13:22,008 INFO L226 Difference]: Without dead ends: 11419 [2023-04-01 23:13:22,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 763 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 23:13:22,023 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6964 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 5819 mSolverCounterSat, 3057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6980 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 8876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3057 IncrementalHoareTripleChecker+Valid, 5819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:22,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6980 Valid, 128 Invalid, 8876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3057 Valid, 5819 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 23:13:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11419 states. [2023-04-01 23:13:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11419 to 10379. [2023-04-01 23:13:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10137 states have (on average 1.2262996941896025) internal successors, (12431), 10230 states have internal predecessors, (12431), 62 states have call successors, (62), 62 states have call predecessors, (62), 179 states have return successors, (1065), 86 states have call predecessors, (1065), 61 states have call successors, (1065) [2023-04-01 23:13:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 13558 transitions. [2023-04-01 23:13:22,290 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 13558 transitions. Word has length 362 [2023-04-01 23:13:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:22,292 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 13558 transitions. [2023-04-01 23:13:22,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.214285714285715) internal successors, (507), 12 states have internal predecessors, (507), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:13:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 13558 transitions. [2023-04-01 23:13:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-04-01 23:13:22,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:22,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:22,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 23:13:22,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:22,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 966461138, now seen corresponding path program 1 times [2023-04-01 23:13:22,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:22,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778240318] [2023-04-01 23:13:22,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:22,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:13:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:22,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:13:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:13:22,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:22,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778240318] [2023-04-01 23:13:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778240318] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143914296] [2023-04-01 23:13:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:22,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:22,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:22,991 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) [2023-04-01 23:13:23,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:13:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:23,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:23,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:13:23,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:13:23,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143914296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:23,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:13:23,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:13:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292911424] [2023-04-01 23:13:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:23,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:13:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:13:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:13:23,198 INFO L87 Difference]: Start difference. First operand 10379 states and 13558 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:13:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:24,305 INFO L93 Difference]: Finished difference Result 20752 states and 27110 transitions. [2023-04-01 23:13:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:13:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 452 [2023-04-01 23:13:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:24,336 INFO L225 Difference]: With dead ends: 20752 [2023-04-01 23:13:24,336 INFO L226 Difference]: Without dead ends: 10379 [2023-04-01 23:13:24,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:13:24,357 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 359 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:24,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 499 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:13:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2023-04-01 23:13:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10379. [2023-04-01 23:13:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10137 states have (on average 1.1918713623359969) internal successors, (12082), 10230 states have internal predecessors, (12082), 62 states have call successors, (62), 62 states have call predecessors, (62), 179 states have return successors, (905), 86 states have call predecessors, (905), 61 states have call successors, (905) [2023-04-01 23:13:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 13049 transitions. [2023-04-01 23:13:24,573 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 13049 transitions. Word has length 452 [2023-04-01 23:13:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:24,574 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 13049 transitions. [2023-04-01 23:13:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:13:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 13049 transitions. [2023-04-01 23:13:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-04-01 23:13:24,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:24,591 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:13:24,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:24,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:24,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1958602350, now seen corresponding path program 1 times [2023-04-01 23:13:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766350465] [2023-04-01 23:13:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:13:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:13:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:13:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-04-01 23:13:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766350465] [2023-04-01 23:13:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766350465] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561594250] [2023-04-01 23:13:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:25,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:25,442 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) [2023-04-01 23:13:25,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:13:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:25,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:25,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:13:25,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:13:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-04-01 23:13:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561594250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:13:26,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:13:26,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:13:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843151673] [2023-04-01 23:13:26,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:13:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:13:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:13:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:13:26,169 INFO L87 Difference]: Start difference. First operand 10379 states and 13049 transitions. Second operand has 12 states, 12 states have (on average 48.75) internal successors, (585), 10 states have internal predecessors, (585), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:30,404 INFO L93 Difference]: Finished difference Result 31643 states and 39820 transitions. [2023-04-01 23:13:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:13:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 48.75) internal successors, (585), 10 states have internal predecessors, (585), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 559 [2023-04-01 23:13:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:30,458 INFO L225 Difference]: With dead ends: 31643 [2023-04-01 23:13:30,458 INFO L226 Difference]: Without dead ends: 16414 [2023-04-01 23:13:30,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1133 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:13:30,487 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1902 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 6755 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 7666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 6755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:30,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 149 Invalid, 7666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 6755 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 23:13:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16414 states. [2023-04-01 23:13:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16414 to 13000. [2023-04-01 23:13:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13000 states, 12756 states have (on average 1.0520539354029477) internal successors, (13420), 12834 states have internal predecessors, (13420), 78 states have call successors, (78), 78 states have call predecessors, (78), 165 states have return successors, (690), 87 states have call predecessors, (690), 77 states have call successors, (690) [2023-04-01 23:13:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13000 states to 13000 states and 14188 transitions. [2023-04-01 23:13:30,779 INFO L78 Accepts]: Start accepts. Automaton has 13000 states and 14188 transitions. Word has length 559 [2023-04-01 23:13:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:30,780 INFO L495 AbstractCegarLoop]: Abstraction has 13000 states and 14188 transitions. [2023-04-01 23:13:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.75) internal successors, (585), 10 states have internal predecessors, (585), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13000 states and 14188 transitions. [2023-04-01 23:13:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1027 [2023-04-01 23:13:30,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:30,829 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-04-01 23:13:30,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 23:13:31,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:31,036 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:31,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash -620579104, now seen corresponding path program 1 times [2023-04-01 23:13:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809940465] [2023-04-01 23:13:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:31,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:13:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:13:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-04-01 23:13:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2023-04-01 23:13:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2023-04-01 23:13:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:31,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 909 [2023-04-01 23:13:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 441 proven. 352 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2023-04-01 23:13:32,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809940465] [2023-04-01 23:13:32,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809940465] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400029755] [2023-04-01 23:13:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:32,011 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) [2023-04-01 23:13:32,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:13:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:32,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:32,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1705 proven. 2 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-04-01 23:13:32,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:13:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 444 proven. 355 refuted. 0 times theorem prover too weak. 1517 trivial. 0 not checked. [2023-04-01 23:13:32,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400029755] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:13:32,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:13:32,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:13:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330214766] [2023-04-01 23:13:32,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:13:32,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:13:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:13:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:13:32,988 INFO L87 Difference]: Start difference. First operand 13000 states and 14188 transitions. Second operand has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:35,912 INFO L93 Difference]: Finished difference Result 26527 states and 29625 transitions. [2023-04-01 23:13:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:13:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 1026 [2023-04-01 23:13:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:35,958 INFO L225 Difference]: With dead ends: 26527 [2023-04-01 23:13:35,958 INFO L226 Difference]: Without dead ends: 13533 [2023-04-01 23:13:35,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 2075 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:13:35,987 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2261 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 4544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:35,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2266 Valid, 127 Invalid, 4544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4257 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:13:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13533 states. [2023-04-01 23:13:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13533 to 11323. [2023-04-01 23:13:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11323 states, 11096 states have (on average 1.0375811103100216) internal successors, (11513), 11176 states have internal predecessors, (11513), 69 states have call successors, (69), 68 states have call predecessors, (69), 157 states have return successors, (467), 78 states have call predecessors, (467), 68 states have call successors, (467) [2023-04-01 23:13:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11323 states to 11323 states and 12049 transitions. [2023-04-01 23:13:36,242 INFO L78 Accepts]: Start accepts. Automaton has 11323 states and 12049 transitions. Word has length 1026 [2023-04-01 23:13:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:36,243 INFO L495 AbstractCegarLoop]: Abstraction has 11323 states and 12049 transitions. [2023-04-01 23:13:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.18181818181819) internal successors, (893), 9 states have internal predecessors, (893), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 11323 states and 12049 transitions. [2023-04-01 23:13:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1055 [2023-04-01 23:13:36,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:36,271 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-04-01 23:13:36,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:36,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:36,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:36,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash 844659870, now seen corresponding path program 1 times [2023-04-01 23:13:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:36,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765010180] [2023-04-01 23:13:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:13:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2023-04-01 23:13:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:13:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2023-04-01 23:13:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2023-04-01 23:13:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2023-04-01 23:13:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 695 proven. 22 refuted. 0 times theorem prover too weak. 1678 trivial. 0 not checked. [2023-04-01 23:13:38,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765010180] [2023-04-01 23:13:38,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765010180] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296154448] [2023-04-01 23:13:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:38,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:38,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:38,144 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) [2023-04-01 23:13:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:13:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:38,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:13:38,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 694 proven. 2 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2023-04-01 23:13:38,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:13:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 694 proven. 2 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2023-04-01 23:13:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296154448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:13:38,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:13:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-04-01 23:13:38,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488461294] [2023-04-01 23:13:38,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:13:38,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:13:38,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:13:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:13:39,000 INFO L87 Difference]: Start difference. First operand 11323 states and 12049 transitions. Second operand has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:42,112 INFO L93 Difference]: Finished difference Result 24131 states and 26048 transitions. [2023-04-01 23:13:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:13:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 1054 [2023-04-01 23:13:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:42,155 INFO L225 Difference]: With dead ends: 24131 [2023-04-01 23:13:42,155 INFO L226 Difference]: Without dead ends: 13157 [2023-04-01 23:13:42,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2147 GetRequests, 2127 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:13:42,173 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2090 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 5106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:42,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 122 Invalid, 5106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:13:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13157 states. [2023-04-01 23:13:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13157 to 12812. [2023-04-01 23:13:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12812 states, 12529 states have (on average 1.0321653763269216) internal successors, (12932), 12618 states have internal predecessors, (12932), 107 states have call successors, (107), 76 states have call predecessors, (107), 175 states have return successors, (791), 117 states have call predecessors, (791), 106 states have call successors, (791) [2023-04-01 23:13:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12812 states to 12812 states and 13830 transitions. [2023-04-01 23:13:42,492 INFO L78 Accepts]: Start accepts. Automaton has 12812 states and 13830 transitions. Word has length 1054 [2023-04-01 23:13:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:42,494 INFO L495 AbstractCegarLoop]: Abstraction has 12812 states and 13830 transitions. [2023-04-01 23:13:42,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:13:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12812 states and 13830 transitions. [2023-04-01 23:13:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1391 [2023-04-01 23:13:42,542 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:42,543 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 23:13:42,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:42,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:42,751 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:42,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1322550074, now seen corresponding path program 1 times [2023-04-01 23:13:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966259108] [2023-04-01 23:13:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:44,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:13:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2023-04-01 23:13:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:13:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2023-04-01 23:13:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2023-04-01 23:13:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2023-04-01 23:13:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:13:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1273 [2023-04-01 23:13:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3442 backedges. 159 proven. 441 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2023-04-01 23:13:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966259108] [2023-04-01 23:13:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966259108] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679200928] [2023-04-01 23:13:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:45,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:45,454 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) [2023-04-01 23:13:45,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:13:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:45,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:13:45,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3442 backedges. 1040 proven. 0 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2023-04-01 23:13:46,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:13:46,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679200928] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:13:46,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:13:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 23:13:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644469105] [2023-04-01 23:13:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:13:46,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:13:46,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:13:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:13:46,291 INFO L87 Difference]: Start difference. First operand 12812 states and 13830 transitions. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 4 states have internal predecessors, (589), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:13:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:13:47,477 INFO L93 Difference]: Finished difference Result 25835 states and 27553 transitions. [2023-04-01 23:13:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:13:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 4 states have internal predecessors, (589), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 1390 [2023-04-01 23:13:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:13:47,511 INFO L225 Difference]: With dead ends: 25835 [2023-04-01 23:13:47,512 INFO L226 Difference]: Without dead ends: 13372 [2023-04-01 23:13:47,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1420 GetRequests, 1408 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:13:47,532 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 524 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:13:47,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 69 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:13:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2023-04-01 23:13:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 13368. [2023-04-01 23:13:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13368 states, 13105 states have (on average 1.031285768790538) internal successors, (13515), 13197 states have internal predecessors, (13515), 80 states have call successors, (80), 80 states have call predecessors, (80), 182 states have return successors, (478), 90 states have call predecessors, (478), 79 states have call successors, (478) [2023-04-01 23:13:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 14073 transitions. [2023-04-01 23:13:47,758 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 14073 transitions. Word has length 1390 [2023-04-01 23:13:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:13:47,758 INFO L495 AbstractCegarLoop]: Abstraction has 13368 states and 14073 transitions. [2023-04-01 23:13:47,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 4 states have internal predecessors, (589), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:13:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 14073 transitions. [2023-04-01 23:13:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1638 [2023-04-01 23:13:47,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:13:47,807 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 23:13:47,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:13:48,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:48,017 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:13:48,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:13:48,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1397159760, now seen corresponding path program 1 times [2023-04-01 23:13:48,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:13:48,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311899816] [2023-04-01 23:13:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:48,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:13:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:13:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:13:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-04-01 23:13:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2023-04-01 23:13:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:13:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 717 [2023-04-01 23:13:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 859 [2023-04-01 23:13:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 969 [2023-04-01 23:13:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1184 [2023-04-01 23:13:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:50,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:13:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1520 [2023-04-01 23:13:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4734 backedges. 264 proven. 442 refuted. 0 times theorem prover too weak. 4028 trivial. 0 not checked. [2023-04-01 23:13:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:13:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311899816] [2023-04-01 23:13:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311899816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:13:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645604598] [2023-04-01 23:13:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:13:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:13:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:13:51,028 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) [2023-04-01 23:13:51,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:13:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:13:51,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 23:13:51,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:13:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4734 backedges. 2330 proven. 2 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2023-04-01 23:13:52,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:13:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4734 backedges. 128 proven. 2260 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2023-04-01 23:13:57,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645604598] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:13:57,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:13:57,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-04-01 23:13:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861102132] [2023-04-01 23:13:57,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:13:57,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 23:13:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:13:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 23:13:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:13:57,301 INFO L87 Difference]: Start difference. First operand 13368 states and 14073 transitions. Second operand has 20 states, 20 states have (on average 87.55) internal successors, (1751), 18 states have internal predecessors, (1751), 8 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 23:14:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:05,337 INFO L93 Difference]: Finished difference Result 32858 states and 34797 transitions. [2023-04-01 23:14:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-01 23:14:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 87.55) internal successors, (1751), 18 states have internal predecessors, (1751), 8 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 1637 [2023-04-01 23:14:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:05,384 INFO L225 Difference]: With dead ends: 32858 [2023-04-01 23:14:05,384 INFO L226 Difference]: Without dead ends: 20172 [2023-04-01 23:14:05,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3399 GetRequests, 3330 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=877, Invalid=3953, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 23:14:05,405 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9212 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 11920 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9212 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 12805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 11920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:05,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9212 Valid, 281 Invalid, 12805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 11920 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-04-01 23:14:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20172 states. [2023-04-01 23:14:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20172 to 15743. [2023-04-01 23:14:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15743 states, 15444 states have (on average 1.0257057757057757) internal successors, (15841), 15544 states have internal predecessors, (15841), 94 states have call successors, (94), 94 states have call predecessors, (94), 204 states have return successors, (503), 104 states have call predecessors, (503), 93 states have call successors, (503) [2023-04-01 23:14:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15743 states to 15743 states and 16438 transitions. [2023-04-01 23:14:05,789 INFO L78 Accepts]: Start accepts. Automaton has 15743 states and 16438 transitions. Word has length 1637 [2023-04-01 23:14:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:05,790 INFO L495 AbstractCegarLoop]: Abstraction has 15743 states and 16438 transitions. [2023-04-01 23:14:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 87.55) internal successors, (1751), 18 states have internal predecessors, (1751), 8 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 23:14:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15743 states and 16438 transitions. [2023-04-01 23:14:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1767 [2023-04-01 23:14:05,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:05,828 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:14:05,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:14:06,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 23:14:06,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:06,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1930101238, now seen corresponding path program 1 times [2023-04-01 23:14:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:06,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098014606] [2023-04-01 23:14:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:07,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 409 [2023-04-01 23:14:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2023-04-01 23:14:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 733 [2023-04-01 23:14:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1006 [2023-04-01 23:14:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1260 [2023-04-01 23:14:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1491 [2023-04-01 23:14:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1649 [2023-04-01 23:14:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5821 backedges. 888 proven. 752 refuted. 0 times theorem prover too weak. 4181 trivial. 0 not checked. [2023-04-01 23:14:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098014606] [2023-04-01 23:14:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098014606] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104903414] [2023-04-01 23:14:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:08,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:08,605 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) [2023-04-01 23:14:08,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:14:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:08,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:14:09,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5821 backedges. 974 proven. 2 refuted. 0 times theorem prover too weak. 4845 trivial. 0 not checked. [2023-04-01 23:14:09,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5821 backedges. 974 proven. 2 refuted. 0 times theorem prover too weak. 4845 trivial. 0 not checked. [2023-04-01 23:14:09,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104903414] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:09,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:09,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:14:09,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27862203] [2023-04-01 23:14:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:09,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:14:09,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:09,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:14:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:14:09,612 INFO L87 Difference]: Start difference. First operand 15743 states and 16438 transitions. Second operand has 14 states, 14 states have (on average 56.142857142857146) internal successors, (786), 12 states have internal predecessors, (786), 6 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:16,501 INFO L93 Difference]: Finished difference Result 35226 states and 36836 transitions. [2023-04-01 23:14:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-01 23:14:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 56.142857142857146) internal successors, (786), 12 states have internal predecessors, (786), 6 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 1766 [2023-04-01 23:14:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:16,544 INFO L225 Difference]: With dead ends: 35226 [2023-04-01 23:14:16,545 INFO L226 Difference]: Without dead ends: 19828 [2023-04-01 23:14:16,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3642 GetRequests, 3584 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=2920, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 23:14:16,566 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 7441 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 8862 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7441 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 9307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 8862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:16,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7441 Valid, 490 Invalid, 9307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 8862 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 23:14:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19828 states. [2023-04-01 23:14:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19828 to 18468. [2023-04-01 23:14:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18468 states, 18123 states have (on average 1.0212989019478012) internal successors, (18509), 18236 states have internal predecessors, (18509), 110 states have call successors, (110), 110 states have call predecessors, (110), 234 states have return successors, (518), 121 states have call predecessors, (518), 109 states have call successors, (518) [2023-04-01 23:14:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18468 states to 18468 states and 19137 transitions. [2023-04-01 23:14:16,904 INFO L78 Accepts]: Start accepts. Automaton has 18468 states and 19137 transitions. Word has length 1766 [2023-04-01 23:14:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:16,905 INFO L495 AbstractCegarLoop]: Abstraction has 18468 states and 19137 transitions. [2023-04-01 23:14:16,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.142857142857146) internal successors, (786), 12 states have internal predecessors, (786), 6 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:14:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 18468 states and 19137 transitions. [2023-04-01 23:14:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2256 [2023-04-01 23:14:16,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:16,960 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2023-04-01 23:14:16,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:14:17,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:14:17,170 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:17,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1012115115, now seen corresponding path program 1 times [2023-04-01 23:14:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019419576] [2023-04-01 23:14:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 409 [2023-04-01 23:14:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2023-04-01 23:14:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2023-04-01 23:14:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 723 [2023-04-01 23:14:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1050 [2023-04-01 23:14:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1124 [2023-04-01 23:14:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1397 [2023-04-01 23:14:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1651 [2023-04-01 23:14:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1816 [2023-04-01 23:14:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2138 [2023-04-01 23:14:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8811 backedges. 1611 proven. 546 refuted. 0 times theorem prover too weak. 6654 trivial. 0 not checked. [2023-04-01 23:14:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019419576] [2023-04-01 23:14:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019419576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725497511] [2023-04-01 23:14:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:20,981 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) [2023-04-01 23:14:21,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:14:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:21,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:14:21,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8811 backedges. 4835 proven. 2 refuted. 0 times theorem prover too weak. 3974 trivial. 0 not checked. [2023-04-01 23:14:21,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8811 backedges. 666 proven. 744 refuted. 0 times theorem prover too weak. 7401 trivial. 0 not checked. [2023-04-01 23:14:22,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725497511] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:22,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:22,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 23:14:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749083004] [2023-04-01 23:14:22,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:22,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:14:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:14:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:14:22,790 INFO L87 Difference]: Start difference. First operand 18468 states and 19137 transitions. Second operand has 15 states, 15 states have (on average 77.46666666666667) internal successors, (1162), 13 states have internal predecessors, (1162), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-01 23:14:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:30,375 INFO L93 Difference]: Finished difference Result 39648 states and 41152 transitions. [2023-04-01 23:14:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-01 23:14:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 77.46666666666667) internal successors, (1162), 13 states have internal predecessors, (1162), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 2255 [2023-04-01 23:14:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:30,423 INFO L225 Difference]: With dead ends: 39648 [2023-04-01 23:14:30,423 INFO L226 Difference]: Without dead ends: 21525 [2023-04-01 23:14:30,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4654 GetRequests, 4585 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=842, Invalid=3988, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 23:14:30,450 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 4854 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10896 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4854 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 11417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 10896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:30,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4854 Valid, 279 Invalid, 11417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 10896 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 23:14:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21525 states. [2023-04-01 23:14:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21525 to 20841. [2023-04-01 23:14:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20461 states have (on average 1.0199892478373491) internal successors, (20870), 20581 states have internal predecessors, (20870), 124 states have call successors, (124), 124 states have call predecessors, (124), 255 states have return successors, (571), 135 states have call predecessors, (571), 123 states have call successors, (571) [2023-04-01 23:14:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 21565 transitions. [2023-04-01 23:14:30,907 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 21565 transitions. Word has length 2255 [2023-04-01 23:14:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:30,908 INFO L495 AbstractCegarLoop]: Abstraction has 20841 states and 21565 transitions. [2023-04-01 23:14:30,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.46666666666667) internal successors, (1162), 13 states have internal predecessors, (1162), 6 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-04-01 23:14:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 21565 transitions. [2023-04-01 23:14:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2408 [2023-04-01 23:14:30,965 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:30,967 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:14:30,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:14:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:14:31,176 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:31,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash 892237921, now seen corresponding path program 1 times [2023-04-01 23:14:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295194563] [2023-04-01 23:14:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 409 [2023-04-01 23:14:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2023-04-01 23:14:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 934 [2023-04-01 23:14:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1017 [2023-04-01 23:14:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1205 [2023-04-01 23:14:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1478 [2023-04-01 23:14:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1549 [2023-04-01 23:14:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1803 [2023-04-01 23:14:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1968 [2023-04-01 23:14:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2290 [2023-04-01 23:14:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10060 backedges. 1450 proven. 875 refuted. 0 times theorem prover too weak. 7735 trivial. 0 not checked. [2023-04-01 23:14:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295194563] [2023-04-01 23:14:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295194563] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:34,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95323674] [2023-04-01 23:14:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:34,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:34,397 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) [2023-04-01 23:14:34,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:14:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:34,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 23:14:35,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10060 backedges. 3376 proven. 2 refuted. 0 times theorem prover too weak. 6682 trivial. 0 not checked. [2023-04-01 23:14:35,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10060 backedges. 173 proven. 3285 refuted. 0 times theorem prover too weak. 6602 trivial. 0 not checked. [2023-04-01 23:14:38,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95323674] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:38,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:38,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-04-01 23:14:38,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189343899] [2023-04-01 23:14:38,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:38,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 23:14:38,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 23:14:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:14:38,720 INFO L87 Difference]: Start difference. First operand 20841 states and 21565 transitions. Second operand has 20 states, 20 states have (on average 86.75) internal successors, (1735), 18 states have internal predecessors, (1735), 8 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-01 23:14:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:14:47,344 INFO L93 Difference]: Finished difference Result 42713 states and 44295 transitions. [2023-04-01 23:14:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-04-01 23:14:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 86.75) internal successors, (1735), 18 states have internal predecessors, (1735), 8 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 2407 [2023-04-01 23:14:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:14:47,377 INFO L225 Difference]: With dead ends: 42713 [2023-04-01 23:14:47,377 INFO L226 Difference]: Without dead ends: 22217 [2023-04-01 23:14:47,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4949 GetRequests, 4872 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=956, Invalid=5050, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 23:14:47,398 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12449 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 10286 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12460 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 11107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 10286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:14:47,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12460 Valid, 292 Invalid, 11107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 10286 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-04-01 23:14:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22217 states. [2023-04-01 23:14:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22217 to 20488. [2023-04-01 23:14:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20488 states, 20120 states have (on average 1.0150596421471172) internal successors, (20423), 20232 states have internal predecessors, (20423), 122 states have call successors, (122), 122 states have call predecessors, (122), 245 states have return successors, (441), 133 states have call predecessors, (441), 121 states have call successors, (441) [2023-04-01 23:14:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20488 states to 20488 states and 20986 transitions. [2023-04-01 23:14:47,738 INFO L78 Accepts]: Start accepts. Automaton has 20488 states and 20986 transitions. Word has length 2407 [2023-04-01 23:14:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:14:47,738 INFO L495 AbstractCegarLoop]: Abstraction has 20488 states and 20986 transitions. [2023-04-01 23:14:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 86.75) internal successors, (1735), 18 states have internal predecessors, (1735), 8 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-04-01 23:14:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20488 states and 20986 transitions. [2023-04-01 23:14:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2519 [2023-04-01 23:14:47,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:14:47,800 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:14:47,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:14:48,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 23:14:48,010 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:14:48,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:14:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 952155354, now seen corresponding path program 1 times [2023-04-01 23:14:48,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:14:48,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755983879] [2023-04-01 23:14:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:48,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:14:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:14:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:51,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:14:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:14:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:14:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-04-01 23:14:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 995 [2023-04-01 23:14:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1078 [2023-04-01 23:14:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1266 [2023-04-01 23:14:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1376 [2023-04-01 23:14:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1660 [2023-04-01 23:14:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1914 [2023-04-01 23:14:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2079 [2023-04-01 23:14:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:14:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2401 [2023-04-01 23:14:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10868 backedges. 1762 proven. 2443 refuted. 0 times theorem prover too weak. 6663 trivial. 0 not checked. [2023-04-01 23:14:52,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:14:52,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755983879] [2023-04-01 23:14:52,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755983879] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:14:52,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257755440] [2023-04-01 23:14:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:14:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:14:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:14:52,451 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) [2023-04-01 23:14:52,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:14:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:14:52,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 3124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:14:52,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:14:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10868 backedges. 5290 proven. 2 refuted. 0 times theorem prover too weak. 5576 trivial. 0 not checked. [2023-04-01 23:14:53,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:14:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10868 backedges. 667 proven. 1633 refuted. 0 times theorem prover too weak. 8568 trivial. 0 not checked. [2023-04-01 23:14:57,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257755440] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:14:57,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:14:57,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-04-01 23:14:57,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992649436] [2023-04-01 23:14:57,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:14:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:14:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:14:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:14:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:14:57,310 INFO L87 Difference]: Start difference. First operand 20488 states and 20986 transitions. Second operand has 16 states, 16 states have (on average 105.8125) internal successors, (1693), 14 states have internal predecessors, (1693), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 23:15:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:15:04,436 INFO L93 Difference]: Finished difference Result 41029 states and 42082 transitions. [2023-04-01 23:15:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-04-01 23:15:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 105.8125) internal successors, (1693), 14 states have internal predecessors, (1693), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 2518 [2023-04-01 23:15:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:15:04,469 INFO L225 Difference]: With dead ends: 41029 [2023-04-01 23:15:04,469 INFO L226 Difference]: Without dead ends: 20886 [2023-04-01 23:15:04,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5195 GetRequests, 5115 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=908, Invalid=5572, Unknown=0, NotChecked=0, Total=6480 [2023-04-01 23:15:04,488 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7524 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 10321 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7524 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 10722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 10321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:15:04,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7524 Valid, 453 Invalid, 10722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 10321 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 23:15:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20886 states. [2023-04-01 23:15:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20886 to 20497. [2023-04-01 23:15:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20497 states, 20125 states have (on average 1.0137639751552796) internal successors, (20402), 20240 states have internal predecessors, (20402), 122 states have call successors, (122), 122 states have call predecessors, (122), 249 states have return successors, (402), 134 states have call predecessors, (402), 121 states have call successors, (402) [2023-04-01 23:15:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20497 states to 20497 states and 20926 transitions. [2023-04-01 23:15:04,764 INFO L78 Accepts]: Start accepts. Automaton has 20497 states and 20926 transitions. Word has length 2518 [2023-04-01 23:15:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:15:04,764 INFO L495 AbstractCegarLoop]: Abstraction has 20497 states and 20926 transitions. [2023-04-01 23:15:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 105.8125) internal successors, (1693), 14 states have internal predecessors, (1693), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 23:15:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20497 states and 20926 transitions. [2023-04-01 23:15:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2566 [2023-04-01 23:15:04,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:15:04,822 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:15:04,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 23:15:05,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:15:05,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:15:05,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:15:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash -3230266, now seen corresponding path program 1 times [2023-04-01 23:15:05,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:15:05,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162191535] [2023-04-01 23:15:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:05,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:15:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:15:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:15:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-04-01 23:15:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2023-04-01 23:15:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 517 [2023-04-01 23:15:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 766 [2023-04-01 23:15:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1042 [2023-04-01 23:15:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1125 [2023-04-01 23:15:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1313 [2023-04-01 23:15:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1423 [2023-04-01 23:15:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1707 [2023-04-01 23:15:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1961 [2023-04-01 23:15:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2126 [2023-04-01 23:15:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:15:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2448 [2023-04-01 23:15:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11707 backedges. 1772 proven. 830 refuted. 0 times theorem prover too weak. 9105 trivial. 0 not checked. [2023-04-01 23:15:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:15:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162191535] [2023-04-01 23:15:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162191535] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:15:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374080320] [2023-04-01 23:15:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:15:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:15:08,641 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) [2023-04-01 23:15:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:15:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:09,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 3206 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:15:09,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:15:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11707 backedges. 7617 proven. 10 refuted. 0 times theorem prover too weak. 4080 trivial. 0 not checked. [2023-04-01 23:15:10,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:15:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11707 backedges. 1920 proven. 522 refuted. 0 times theorem prover too weak. 9265 trivial. 0 not checked. [2023-04-01 23:15:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374080320] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:15:13,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:15:13,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 18 [2023-04-01 23:15:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41362737] [2023-04-01 23:15:13,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:15:13,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 23:15:13,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:15:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 23:15:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-04-01 23:15:13,628 INFO L87 Difference]: Start difference. First operand 20497 states and 20926 transitions. Second operand has 18 states, 18 states have (on average 96.5) internal successors, (1737), 16 states have internal predecessors, (1737), 7 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 23:15:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:15:21,371 INFO L93 Difference]: Finished difference Result 41353 states and 42284 transitions. [2023-04-01 23:15:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-01 23:15:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 96.5) internal successors, (1737), 16 states have internal predecessors, (1737), 7 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 2565 [2023-04-01 23:15:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:15:21,408 INFO L225 Difference]: With dead ends: 41353 [2023-04-01 23:15:21,408 INFO L226 Difference]: Without dead ends: 21201 [2023-04-01 23:15:21,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5262 GetRequests, 5193 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=966, Invalid=3864, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 23:15:21,428 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6741 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 9949 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6741 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 10336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 9949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:15:21,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6741 Valid, 362 Invalid, 10336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 9949 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 23:15:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21201 states. [2023-04-01 23:15:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21201 to 20826. [2023-04-01 23:15:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20826 states, 20454 states have (on average 1.0132981323946417) internal successors, (20726), 20565 states have internal predecessors, (20726), 124 states have call successors, (124), 124 states have call predecessors, (124), 247 states have return successors, (399), 136 states have call predecessors, (399), 123 states have call successors, (399) [2023-04-01 23:15:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20826 states to 20826 states and 21249 transitions. [2023-04-01 23:15:21,872 INFO L78 Accepts]: Start accepts. Automaton has 20826 states and 21249 transitions. Word has length 2565 [2023-04-01 23:15:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:15:21,873 INFO L495 AbstractCegarLoop]: Abstraction has 20826 states and 21249 transitions. [2023-04-01 23:15:21,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.5) internal successors, (1737), 16 states have internal predecessors, (1737), 7 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-04-01 23:15:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20826 states and 21249 transitions. [2023-04-01 23:15:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2807 [2023-04-01 23:15:21,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:15:21,928 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:15:21,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:15:22,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 23:15:22,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:15:22,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:15:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1978520954, now seen corresponding path program 1 times [2023-04-01 23:15:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:15:22,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930229665] [2023-04-01 23:15:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:15:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:15:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:15:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-04-01 23:15:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2023-04-01 23:15:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2023-04-01 23:15:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2023-04-01 23:15:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 928 [2023-04-01 23:15:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1070 [2023-04-01 23:15:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1320 [2023-04-01 23:15:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1593 [2023-04-01 23:15:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1877 [2023-04-01 23:15:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1948 [2023-04-01 23:15:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2202 [2023-04-01 23:15:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2367 [2023-04-01 23:15:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:15:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2689 [2023-04-01 23:15:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14292 backedges. 1693 proven. 1155 refuted. 0 times theorem prover too weak. 11444 trivial. 0 not checked. [2023-04-01 23:15:26,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:15:26,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930229665] [2023-04-01 23:15:26,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930229665] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:15:26,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852037053] [2023-04-01 23:15:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:15:26,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:15:26,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:15:26,477 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) [2023-04-01 23:15:26,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:15:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:15:27,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 3481 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:15:27,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:15:37,927 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-04-01 23:16:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14292 backedges. 9444 proven. 277 refuted. 0 times theorem prover too weak. 4571 trivial. 0 not checked. [2023-04-01 23:16:04,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:16:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14292 backedges. 1918 proven. 873 refuted. 0 times theorem prover too weak. 11501 trivial. 0 not checked. [2023-04-01 23:16:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852037053] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:16:09,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:16:09,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 18 [2023-04-01 23:16:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696858573] [2023-04-01 23:16:09,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:16:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 23:16:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:16:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 23:16:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-01 23:16:09,662 INFO L87 Difference]: Start difference. First operand 20826 states and 21249 transitions. Second operand has 18 states, 18 states have (on average 98.72222222222223) internal successors, (1777), 16 states have internal predecessors, (1777), 7 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15)