/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/Problem12_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:21:21,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:21:21,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:21:21,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:21:21,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:21:21,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:21:21,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:21:21,768 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 [2023-03-30 23:21:21,790 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:21:21,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:21:21,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:21:21,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:21:21,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:21:21,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:21:21,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:21:21,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:21:21,793 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:21:21,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:21:21,794 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:21:21,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:21:21,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:21:21,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:21:21,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:21:21,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:21:21,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:21:21,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:21:21,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:21:21,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:21:21,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:21:21,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:21:21,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:21:21,797 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:21:21,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:21:21,797 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:21:21,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:21:21,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:21:21,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:21:21,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:21:21,974 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:21:21,974 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:21:21,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label41.c [2023-03-30 23:21:23,076 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:21:23,381 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:21:23,381 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label41.c [2023-03-30 23:21:23,403 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6e52987/e087d490c605496f8fbb8a38315fd43c/FLAGced6e3aac [2023-03-30 23:21:23,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6e52987/e087d490c605496f8fbb8a38315fd43c [2023-03-30 23:21:23,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:21:23,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:21:23,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:21:23,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:21:23,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:21:23,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:21:23" (1/1) ... [2023-03-30 23:21:23,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb4607c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:23, skipping insertion in model container [2023-03-30 23:21:23,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:21:23" (1/1) ... [2023-03-30 23:21:23,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:21:23,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:21:23,755 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/Problem12_label41.c[6479,6492] [2023-03-30 23:21:24,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:21:24,332 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:21:24,356 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/Problem12_label41.c[6479,6492] [2023-03-30 23:21:24,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:21:24,626 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:21:24,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24 WrapperNode [2023-03-30 23:21:24,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:21:24,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:21:24,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:21:24,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:21:24,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:21:24,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:21:24,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:21:24,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:21:24,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (1/1) ... [2023-03-30 23:21:24,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:21:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:24,911 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) [2023-03-30 23:21:24,930 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 [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:21:24,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:21:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:21:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:21:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:21:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:21:24,995 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:21:24,997 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:21:28,042 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:21:28,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:21:28,055 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:21:28,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:21:28 BoogieIcfgContainer [2023-03-30 23:21:28,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:21:28,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:21:28,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:21:28,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:21:28,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:21:23" (1/3) ... [2023-03-30 23:21:28,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca0de44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:21:28, skipping insertion in model container [2023-03-30 23:21:28,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:21:24" (2/3) ... [2023-03-30 23:21:28,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca0de44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:21:28, skipping insertion in model container [2023-03-30 23:21:28,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:21:28" (3/3) ... [2023-03-30 23:21:28,065 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label41.c [2023-03-30 23:21:28,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:21:28,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:21:28,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:21:28,139 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;@7598f02a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:21:28,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:21:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 23:21:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-30 23:21:28,153 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:28,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:28,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:28,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1370428907, now seen corresponding path program 1 times [2023-03-30 23:21:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:28,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153533027] [2023-03-30 23:21:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:28,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153533027] [2023-03-30 23:21:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153533027] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:28,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:28,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:21:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974965787] [2023-03-30 23:21:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:21:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:21:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:21:28,538 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-03-30 23:21:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:34,641 INFO L93 Difference]: Finished difference Result 3253 states and 6294 transitions. [2023-03-30 23:21:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:21:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 58 [2023-03-30 23:21:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:34,666 INFO L225 Difference]: With dead ends: 3253 [2023-03-30 23:21:34,666 INFO L226 Difference]: Without dead ends: 2346 [2023-03-30 23:21:34,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:21:34,676 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 3979 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3979 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 6296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:34,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3979 Valid, 65 Invalid, 6296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:21:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2023-03-30 23:21:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331. [2023-03-30 23:21:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2295 states have (on average 1.6226579520697169) internal successors, (3724), 2297 states have internal predecessors, (3724), 14 states have call successors, (14), 14 states have call predecessors, (14), 21 states have return successors, (49), 19 states have call predecessors, (49), 13 states have call successors, (49) [2023-03-30 23:21:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3787 transitions. [2023-03-30 23:21:34,795 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3787 transitions. Word has length 58 [2023-03-30 23:21:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:34,795 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 3787 transitions. [2023-03-30 23:21:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2023-03-30 23:21:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3787 transitions. [2023-03-30 23:21:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-30 23:21:34,799 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:34,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-30 23:21:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:21:34,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:34,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 909436783, now seen corresponding path program 1 times [2023-03-30 23:21:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865870143] [2023-03-30 23:21:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:34,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:35,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:35,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865870143] [2023-03-30 23:21:35,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865870143] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:35,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568240640] [2023-03-30 23:21:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:35,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:35,307 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) [2023-03-30 23:21:35,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:21:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:35,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:21:35,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:21:35,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:21:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 23:21:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568240640] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:35,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:21:35,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 4] total 12 [2023-03-30 23:21:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377743976] [2023-03-30 23:21:35,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:35,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:21:35,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:21:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:21:35,974 INFO L87 Difference]: Start difference. First operand 2331 states and 3787 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:38,962 INFO L93 Difference]: Finished difference Result 7009 states and 11525 transitions. [2023-03-30 23:21:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 23:21:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 133 [2023-03-30 23:21:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:38,979 INFO L225 Difference]: With dead ends: 7009 [2023-03-30 23:21:38,980 INFO L226 Difference]: Without dead ends: 4684 [2023-03-30 23:21:38,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:21:38,985 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1532 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2647 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 2647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:38,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 74 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [964 Valid, 2647 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:21:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2023-03-30 23:21:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2023-03-30 23:21:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4605 states have (on average 1.4992399565689467) internal successors, (6904), 4612 states have internal predecessors, (6904), 26 states have call successors, (26), 26 states have call predecessors, (26), 52 states have return successors, (208), 45 states have call predecessors, (208), 25 states have call successors, (208) [2023-03-30 23:21:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 7138 transitions. [2023-03-30 23:21:39,081 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 7138 transitions. Word has length 133 [2023-03-30 23:21:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:39,083 INFO L495 AbstractCegarLoop]: Abstraction has 4684 states and 7138 transitions. [2023-03-30 23:21:39,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:21:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 7138 transitions. [2023-03-30 23:21:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-30 23:21:39,093 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:39,093 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:39,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:39,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:39,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1652264067, now seen corresponding path program 1 times [2023-03-30 23:21:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:39,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362780681] [2023-03-30 23:21:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:39,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:39,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:39,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:39,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362780681] [2023-03-30 23:21:39,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362780681] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:39,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:21:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410807591] [2023-03-30 23:21:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:39,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:21:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:21:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:21:39,683 INFO L87 Difference]: Start difference. First operand 4684 states and 7138 transitions. Second operand has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 5 states have internal predecessors, (165), 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) [2023-03-30 23:21:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:45,868 INFO L93 Difference]: Finished difference Result 19066 states and 30791 transitions. [2023-03-30 23:21:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:21:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 5 states have internal predecessors, (165), 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 171 [2023-03-30 23:21:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:45,917 INFO L225 Difference]: With dead ends: 19066 [2023-03-30 23:21:45,918 INFO L226 Difference]: Without dead ends: 14388 [2023-03-30 23:21:45,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:21:45,928 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7669 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 5925 mSolverCounterSat, 2810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7669 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 8735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2810 IncrementalHoareTripleChecker+Valid, 5925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:45,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7669 Valid, 141 Invalid, 8735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2810 Valid, 5925 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-03-30 23:21:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14388 states. [2023-03-30 23:21:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14388 to 14311. [2023-03-30 23:21:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14311 states, 13977 states have (on average 1.366387636831938) internal successors, (19098), 14038 states have internal predecessors, (19098), 74 states have call successors, (74), 74 states have call predecessors, (74), 259 states have return successors, (1890), 198 states have call predecessors, (1890), 73 states have call successors, (1890) [2023-03-30 23:21:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14311 states to 14311 states and 21062 transitions. [2023-03-30 23:21:46,208 INFO L78 Accepts]: Start accepts. Automaton has 14311 states and 21062 transitions. Word has length 171 [2023-03-30 23:21:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:46,209 INFO L495 AbstractCegarLoop]: Abstraction has 14311 states and 21062 transitions. [2023-03-30 23:21:46,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 5 states have internal predecessors, (165), 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) [2023-03-30 23:21:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 14311 states and 21062 transitions. [2023-03-30 23:21:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-03-30 23:21:46,212 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:46,212 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:46,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:21:46,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:46,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:46,213 INFO L85 PathProgramCache]: Analyzing trace with hash -995862564, now seen corresponding path program 1 times [2023-03-30 23:21:46,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:46,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951677008] [2023-03-30 23:21:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:46,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:46,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:46,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:46,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951677008] [2023-03-30 23:21:46,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951677008] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:46,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:21:46,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:21:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408075743] [2023-03-30 23:21:46,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:21:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:21:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:21:46,688 INFO L87 Difference]: Start difference. First operand 14311 states and 21062 transitions. Second operand has 7 states, 6 states have (on average 32.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-03-30 23:21:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:51,741 INFO L93 Difference]: Finished difference Result 36327 states and 55076 transitions. [2023-03-30 23:21:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:21:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 32.0) internal successors, (192), 4 states have internal predecessors, (192), 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 198 [2023-03-30 23:21:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:51,830 INFO L225 Difference]: With dead ends: 36327 [2023-03-30 23:21:51,831 INFO L226 Difference]: Without dead ends: 22022 [2023-03-30 23:21:51,861 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 [2023-03-30 23:21:51,865 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3767 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 5176 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3767 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 6049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 5176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:51,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3767 Valid, 131 Invalid, 6049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 5176 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-03-30 23:21:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22022 states. [2023-03-30 23:21:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22022 to 21922. [2023-03-30 23:21:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21922 states, 21244 states have (on average 1.2899171530785163) internal successors, (27403), 21413 states have internal predecessors, (27403), 110 states have call successors, (110), 110 states have call predecessors, (110), 567 states have return successors, (4536), 398 states have call predecessors, (4536), 109 states have call successors, (4536) [2023-03-30 23:21:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21922 states to 21922 states and 32049 transitions. [2023-03-30 23:21:52,454 INFO L78 Accepts]: Start accepts. Automaton has 21922 states and 32049 transitions. Word has length 198 [2023-03-30 23:21:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:52,455 INFO L495 AbstractCegarLoop]: Abstraction has 21922 states and 32049 transitions. [2023-03-30 23:21:52,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 32.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2023-03-30 23:21:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21922 states and 32049 transitions. [2023-03-30 23:21:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-03-30 23:21:52,460 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:52,460 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:52,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:21:52,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:52,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1903652172, now seen corresponding path program 1 times [2023-03-30 23:21:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:52,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617829470] [2023-03-30 23:21:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:52,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:52,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617829470] [2023-03-30 23:21:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617829470] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800294158] [2023-03-30 23:21:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:52,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:52,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:52,731 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) [2023-03-30 23:21:52,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:21:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:52,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:21:52,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:21:52,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800294158] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:21:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357473388] [2023-03-30 23:21:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:21:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:21:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:52,906 INFO L87 Difference]: Start difference. First operand 21922 states and 32049 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2023-03-30 23:21:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:21:55,918 INFO L93 Difference]: Finished difference Result 64132 states and 97560 transitions. [2023-03-30 23:21:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:21:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 206 [2023-03-30 23:21:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:21:56,219 INFO L225 Difference]: With dead ends: 64132 [2023-03-30 23:21:56,220 INFO L226 Difference]: Without dead ends: 42216 [2023-03-30 23:21:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:21:56,261 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 759 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:21:56,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 165 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:21:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42216 states. [2023-03-30 23:21:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42216 to 39126. [2023-03-30 23:21:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39126 states, 38141 states have (on average 1.2953514590598043) internal successors, (49406), 38373 states have internal predecessors, (49406), 198 states have call successors, (198), 198 states have call predecessors, (198), 786 states have return successors, (10692), 554 states have call predecessors, (10692), 197 states have call successors, (10692) [2023-03-30 23:21:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39126 states to 39126 states and 60296 transitions. [2023-03-30 23:21:57,055 INFO L78 Accepts]: Start accepts. Automaton has 39126 states and 60296 transitions. Word has length 206 [2023-03-30 23:21:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:21:57,056 INFO L495 AbstractCegarLoop]: Abstraction has 39126 states and 60296 transitions. [2023-03-30 23:21:57,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2023-03-30 23:21:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 39126 states and 60296 transitions. [2023-03-30 23:21:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-03-30 23:21:57,063 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:21:57,063 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:21:57,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:21:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:57,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:21:57,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:21:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1371069715, now seen corresponding path program 1 times [2023-03-30 23:21:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:21:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257375960] [2023-03-30 23:21:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:21:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:57,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:21:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:57,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:21:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:57,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:21:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:21:57,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:21:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257375960] [2023-03-30 23:21:57,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257375960] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:21:57,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425341285] [2023-03-30 23:21:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:21:57,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:21:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:21:57,653 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) [2023-03-30 23:21:57,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:21:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:21:57,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 23:21:57,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:21:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-30 23:21:58,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:21:58,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425341285] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:21:58,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:21:58,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 23:21:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71756617] [2023-03-30 23:21:58,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:21:58,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:21:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:21:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:21:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:21:58,047 INFO L87 Difference]: Start difference. First operand 39126 states and 60296 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:22:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:02,221 INFO L93 Difference]: Finished difference Result 114793 states and 186256 transitions. [2023-03-30 23:22:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:22:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 282 [2023-03-30 23:22:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:02,455 INFO L225 Difference]: With dead ends: 114793 [2023-03-30 23:22:02,455 INFO L226 Difference]: Without dead ends: 75673 [2023-03-30 23:22:02,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:22:02,502 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2703 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:02,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2703 Valid, 94 Invalid, 5059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:22:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75673 states. [2023-03-30 23:22:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75673 to 67021. [2023-03-30 23:22:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67021 states, 65350 states have (on average 1.2395409334353482) internal successors, (81004), 65750 states have internal predecessors, (81004), 338 states have call successors, (338), 338 states have call predecessors, (338), 1332 states have return successors, (18681), 932 states have call predecessors, (18681), 337 states have call successors, (18681) [2023-03-30 23:22:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67021 states to 67021 states and 100023 transitions. [2023-03-30 23:22:04,121 INFO L78 Accepts]: Start accepts. Automaton has 67021 states and 100023 transitions. Word has length 282 [2023-03-30 23:22:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:04,121 INFO L495 AbstractCegarLoop]: Abstraction has 67021 states and 100023 transitions. [2023-03-30 23:22:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 23:22:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 67021 states and 100023 transitions. [2023-03-30 23:22:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-03-30 23:22:04,126 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:04,127 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 23:22:04,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-30 23:22:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:04,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:04,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2093210444, now seen corresponding path program 1 times [2023-03-30 23:22:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546008826] [2023-03-30 23:22:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:04,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:04,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:22:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:22:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546008826] [2023-03-30 23:22:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546008826] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000584747] [2023-03-30 23:22:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:04,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:22:05,013 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) [2023-03-30 23:22:05,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:22:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:05,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:22:05,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:22:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:22:05,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:22:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:22:05,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000584747] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:22:05,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:22:05,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:22:05,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296693112] [2023-03-30 23:22:05,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:22:05,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:22:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:22:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:22:05,483 INFO L87 Difference]: Start difference. First operand 67021 states and 100023 transitions. Second operand has 12 states, 12 states have (on average 40.833333333333336) internal successors, (490), 10 states have internal predecessors, (490), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:22:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:15,599 INFO L93 Difference]: Finished difference Result 164863 states and 253000 transitions. [2023-03-30 23:22:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-30 23:22:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 40.833333333333336) internal successors, (490), 10 states have internal predecessors, (490), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 303 [2023-03-30 23:22:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:16,017 INFO L225 Difference]: With dead ends: 164863 [2023-03-30 23:22:16,017 INFO L226 Difference]: Without dead ends: 97848 [2023-03-30 23:22:16,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-03-30 23:22:16,199 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4790 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 14853 mSolverCounterSat, 2162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4796 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 17015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2162 IncrementalHoareTripleChecker+Valid, 14853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:22:16,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4796 Valid, 236 Invalid, 17015 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2162 Valid, 14853 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-03-30 23:22:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97848 states. [2023-03-30 23:22:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97848 to 83619. [2023-03-30 23:22:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83619 states, 81343 states have (on average 1.1304844915973102) internal successors, (91957), 81894 states have internal predecessors, (91957), 492 states have call successors, (492), 418 states have call predecessors, (492), 1783 states have return successors, (18401), 1306 states have call predecessors, (18401), 491 states have call successors, (18401) [2023-03-30 23:22:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83619 states to 83619 states and 110850 transitions. [2023-03-30 23:22:18,355 INFO L78 Accepts]: Start accepts. Automaton has 83619 states and 110850 transitions. Word has length 303 [2023-03-30 23:22:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:22:18,355 INFO L495 AbstractCegarLoop]: Abstraction has 83619 states and 110850 transitions. [2023-03-30 23:22:18,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 40.833333333333336) internal successors, (490), 10 states have internal predecessors, (490), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:22:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 83619 states and 110850 transitions. [2023-03-30 23:22:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-03-30 23:22:18,360 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:22:18,361 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 23:22:18,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:22:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:18,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:22:18,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:22:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1272223484, now seen corresponding path program 1 times [2023-03-30 23:22:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:22:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199166268] [2023-03-30 23:22:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:22:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:18,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:22:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:22:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:18,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-03-30 23:22:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-03-30 23:22:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:22:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199166268] [2023-03-30 23:22:18,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199166268] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:22:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434302379] [2023-03-30 23:22:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:22:18,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:22:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:22:18,895 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) [2023-03-30 23:22:18,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:22:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:22:18,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:22:18,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:22:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-03-30 23:22:19,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:22:19,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434302379] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:22:19,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:22:19,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:22:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645292274] [2023-03-30 23:22:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:22:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:22:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:22:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:22:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:22:19,056 INFO L87 Difference]: Start difference. First operand 83619 states and 110850 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2023-03-30 23:22:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:22:22,350 INFO L93 Difference]: Finished difference Result 187356 states and 246633 transitions. [2023-03-30 23:22:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:22:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 307 [2023-03-30 23:22:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:22:22,617 INFO L225 Difference]: With dead ends: 187356 [2023-03-30 23:22:22,618 INFO L226 Difference]: Without dead ends: 97989