/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/Problem13_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:47:18,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:47:18,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:47:18,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:47:18,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:47:18,851 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:47:18,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:47:18,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:47:18,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:47:18,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:47:18,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:47:18,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:47:18,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:47:18,854 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:47:18,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:47:18,855 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:47:18,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:47:18,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:47:18,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:47:18,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:47:18,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:47:18,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:47:18,858 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:47:19,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:47:19,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:47:19,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:47:19,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:47:19,108 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:47:19,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2023-04-01 22:47:20,334 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:47:20,800 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:47:20,801 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2023-04-01 22:47:20,831 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79f28e01/56999af62b04442ca1e70f55f90b8331/FLAGfbda6a09d [2023-04-01 22:47:20,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79f28e01/56999af62b04442ca1e70f55f90b8331 [2023-04-01 22:47:20,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:47:20,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:47:20,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:47:20,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:47:20,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:47:20,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:47:20" (1/1) ... [2023-04-01 22:47:20,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3034a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:20, skipping insertion in model container [2023-04-01 22:47:20,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:47:20" (1/1) ... [2023-04-01 22:47:20,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:47:20,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:47:21,240 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/Problem13_label45.c[1393,1406] [2023-04-01 22:47:22,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:47:22,029 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:47:22,041 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/Problem13_label45.c[1393,1406] [2023-04-01 22:47:22,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:47:22,517 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:47:22,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22 WrapperNode [2023-04-01 22:47:22,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:47:22,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:47:22,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:47:22,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:47:22,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:47:22,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:47:22,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:47:22,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:47:22,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (1/1) ... [2023-04-01 22:47:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:47:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:22,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:47:23,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:47:23,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:47:23,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:47:23,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:47:23,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:47:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:47:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:47:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:47:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:47:23,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:47:23,126 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:47:23,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:47:27,819 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:47:27,837 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:47:27,838 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:47:27,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:47:27 BoogieIcfgContainer [2023-04-01 22:47:27,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:47:27,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:47:27,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:47:27,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:47:27,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:47:20" (1/3) ... [2023-04-01 22:47:27,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6552d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:47:27, skipping insertion in model container [2023-04-01 22:47:27,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:47:22" (2/3) ... [2023-04-01 22:47:27,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6552d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:47:27, skipping insertion in model container [2023-04-01 22:47:27,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:47:27" (3/3) ... [2023-04-01 22:47:27,861 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2023-04-01 22:47:27,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:47:27,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:47:27,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:47:27,955 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;@1c39ec8f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:47:27,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:47:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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) [2023-04-01 22:47:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 22:47:27,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:27,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:27,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:27,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 291304092, now seen corresponding path program 1 times [2023-04-01 22:47:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:27,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51296918] [2023-04-01 22:47:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:27,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:28,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51296918] [2023-04-01 22:47:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51296918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:47:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152551297] [2023-04-01 22:47:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:28,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:47:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:28,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:47:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:47:28,431 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 4 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:47:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:34,695 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:47:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:47:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2023-04-01 22:47:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:34,724 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:47:34,724 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:47:34,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:47:34,738 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3052 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3052 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:34,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3052 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 22:47:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:47:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:47:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1981 states have (on average 1.6436143361938416) internal successors, (3256), 1983 states have internal predecessors, (3256), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-01 22:47:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:47:34,885 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 13 [2023-04-01 22:47:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:34,886 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:47:34,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:47:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:47:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 22:47:34,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:34,889 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:47:34,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:47:34,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:34,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 723542313, now seen corresponding path program 1 times [2023-04-01 22:47:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:34,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863485800] [2023-04-01 22:47:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:34,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:35,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:35,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:35,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863485800] [2023-04-01 22:47:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863485800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:35,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:35,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:47:35,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184509392] [2023-04-01 22:47:35,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:47:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:47:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:47:35,469 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:43,191 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-04-01 22:47:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:47:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 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 88 [2023-04-01 22:47:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:43,212 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 22:47:43,212 INFO L226 Difference]: Without dead ends: 3860 [2023-04-01 22:47:43,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:47:43,219 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3296 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7739 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 7739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:43,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 815 Invalid, 8924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 7739 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 22:47:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-04-01 22:47:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-04-01 22:47:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3688 states have (on average 1.4899674620390455) internal successors, (5495), 3700 states have internal predecessors, (5495), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (117), 41 states have call predecessors, (117), 17 states have call successors, (117) [2023-04-01 22:47:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:47:43,334 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 88 [2023-04-01 22:47:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:43,334 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:47:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 4 states have internal predecessors, (82), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:47:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 22:47:43,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:43,338 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:47:43,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:47:43,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:43,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash -530299771, now seen corresponding path program 1 times [2023-04-01 22:47:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:43,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092829590] [2023-04-01 22:47:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:43,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:43,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:47:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092829590] [2023-04-01 22:47:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092829590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:43,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:47:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:47:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339293178] [2023-04-01 22:47:43,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:47:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:43,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:47:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:47:43,742 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:52,237 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:47:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:47:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 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 102 [2023-04-01 22:47:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:52,296 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:47:52,297 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:47:52,313 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 [2023-04-01 22:47:52,315 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4930 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4930 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 8284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:52,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4930 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 22:47:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:47:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:47:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.343186180422265) internal successors, (13996), 10488 states have internal predecessors, (13996), 50 states have call successors, (50), 50 states have call predecessors, (50), 280 states have return successors, (1257), 212 states have call predecessors, (1257), 49 states have call successors, (1257) [2023-04-01 22:47:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15303 transitions. [2023-04-01 22:47:52,672 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15303 transitions. Word has length 102 [2023-04-01 22:47:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:52,672 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15303 transitions. [2023-04-01 22:47:52,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:47:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15303 transitions. [2023-04-01 22:47:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-01 22:47:52,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:52,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:47:52,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:47:52,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:52,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash 872635076, now seen corresponding path program 1 times [2023-04-01 22:47:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924267487] [2023-04-01 22:47:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:52,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:52,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-04-01 22:47:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:47:53,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924267487] [2023-04-01 22:47:53,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924267487] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354419582] [2023-04-01 22:47:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:53,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:53,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:53,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:47:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:53,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:47:53,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:47:53,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:47:53,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354419582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:47:53,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:47:53,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-04-01 22:47:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942074088] [2023-04-01 22:47:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:47:53,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:47:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:47:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:47:53,460 INFO L87 Difference]: Start difference. First operand 10751 states and 15303 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:57,908 INFO L93 Difference]: Finished difference Result 31816 states and 47933 transitions. [2023-04-01 22:47:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:47:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 207 [2023-04-01 22:47:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:57,995 INFO L225 Difference]: With dead ends: 31816 [2023-04-01 22:47:57,995 INFO L226 Difference]: Without dead ends: 21071 [2023-04-01 22:47:58,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:47:58,033 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 3172 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 1519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 5809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1519 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:58,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3172 Valid, 679 Invalid, 5809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1519 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 22:47:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21071 states. [2023-04-01 22:47:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21071 to 20984. [2023-04-01 22:47:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20984 states, 20324 states have (on average 1.23002361739815) internal successors, (24999), 20478 states have internal predecessors, (24999), 98 states have call successors, (98), 98 states have call predecessors, (98), 561 states have return successors, (3206), 407 states have call predecessors, (3206), 97 states have call successors, (3206) [2023-04-01 22:47:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20984 states to 20984 states and 28303 transitions. [2023-04-01 22:47:58,567 INFO L78 Accepts]: Start accepts. Automaton has 20984 states and 28303 transitions. Word has length 207 [2023-04-01 22:47:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:58,569 INFO L495 AbstractCegarLoop]: Abstraction has 20984 states and 28303 transitions. [2023-04-01 22:47:58,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20984 states and 28303 transitions. [2023-04-01 22:47:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-04-01 22:47:58,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:58,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:47:58,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:58,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:58,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:58,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:58,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1900879393, now seen corresponding path program 1 times [2023-04-01 22:47:58,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:58,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152953667] [2023-04-01 22:47:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:58,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:59,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:59,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-04-01 22:47:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:47:59,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152953667] [2023-04-01 22:47:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152953667] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859166233] [2023-04-01 22:47:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:59,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:59,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:59,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:47:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:59,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:47:59,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:47:59,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:48:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:48:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859166233] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:48:00,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:48:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2023-04-01 22:48:00,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385206734] [2023-04-01 22:48:00,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:48:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 22:48:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 22:48:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:48:00,775 INFO L87 Difference]: Start difference. First operand 20984 states and 28303 transitions. Second operand has 20 states, 20 states have (on average 30.35) internal successors, (607), 18 states have internal predecessors, (607), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:48:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:51,527 INFO L93 Difference]: Finished difference Result 177698 states and 309826 transitions. [2023-04-01 22:48:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-04-01 22:48:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 30.35) internal successors, (607), 18 states have internal predecessors, (607), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 242 [2023-04-01 22:48:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:52,622 INFO L225 Difference]: With dead ends: 177698 [2023-04-01 22:48:52,623 INFO L226 Difference]: Without dead ends: 156720 [2023-04-01 22:48:52,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4651, Invalid=28291, Unknown=0, NotChecked=0, Total=32942 [2023-04-01 22:48:52,748 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 25190 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 59526 mSolverCounterSat, 11461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25200 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 70987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 11461 IncrementalHoareTripleChecker+Valid, 59526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:52,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25200 Valid, 2793 Invalid, 70987 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [11461 Valid, 59526 Invalid, 0 Unknown, 0 Unchecked, 43.5s Time] [2023-04-01 22:48:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156720 states. [2023-04-01 22:48:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156720 to 141646. [2023-04-01 22:48:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141646 states, 138453 states have (on average 1.1371440127696764) internal successors, (157441), 139244 states have internal predecessors, (157441), 683 states have call successors, (683), 682 states have call predecessors, (683), 2509 states have return successors, (33793), 1719 states have call predecessors, (33793), 682 states have call successors, (33793) [2023-04-01 22:48:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141646 states to 141646 states and 191917 transitions. [2023-04-01 22:48:58,217 INFO L78 Accepts]: Start accepts. Automaton has 141646 states and 191917 transitions. Word has length 242 [2023-04-01 22:48:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:58,218 INFO L495 AbstractCegarLoop]: Abstraction has 141646 states and 191917 transitions. [2023-04-01 22:48:58,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.35) internal successors, (607), 18 states have internal predecessors, (607), 9 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 22:48:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 141646 states and 191917 transitions. [2023-04-01 22:48:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-04-01 22:48:58,229 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:58,229 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 22:48:58,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 22:48:58,434 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 [2023-04-01 22:48:58,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:58,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -977030065, now seen corresponding path program 1 times [2023-04-01 22:48:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786345839] [2023-04-01 22:48:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:48:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:58,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:48:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 182 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 22:48:59,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:59,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786345839] [2023-04-01 22:48:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786345839] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606079615] [2023-04-01 22:48:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:59,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:59,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:59,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:48:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:59,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:48:59,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:48:59,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:48:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-04-01 22:48:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606079615] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:48:59,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:48:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:48:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960785391] [2023-04-01 22:48:59,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:48:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:48:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:48:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:48:59,959 INFO L87 Difference]: Start difference. First operand 141646 states and 191917 transitions. Second operand has 12 states, 12 states have (on average 44.083333333333336) internal successors, (529), 10 states have internal predecessors, (529), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:49:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:12,659 INFO L93 Difference]: Finished difference Result 369580 states and 516971 transitions. [2023-04-01 22:49:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 22:49:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 44.083333333333336) internal successors, (529), 10 states have internal predecessors, (529), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 325 [2023-04-01 22:49:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:13,578 INFO L225 Difference]: With dead ends: 369580 [2023-04-01 22:49:13,578 INFO L226 Difference]: Without dead ends: 227100 [2023-04-01 22:49:13,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:49:13,801 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 11410 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 10775 mSolverCounterSat, 3870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11410 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 14645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3870 IncrementalHoareTripleChecker+Valid, 10775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:13,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11410 Valid, 887 Invalid, 14645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3870 Valid, 10775 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-04-01 22:49:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227100 states. [2023-04-01 22:49:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227100 to 215808. [2023-04-01 22:49:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215808 states, 211466 states have (on average 1.113587999962169) internal successors, (235486), 212475 states have internal predecessors, (235486), 1047 states have call successors, (1047), 1046 states have call predecessors, (1047), 3294 states have return successors, (50048), 2286 states have call predecessors, (50048), 1046 states have call successors, (50048) [2023-04-01 22:49:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215808 states to 215808 states and 286581 transitions. [2023-04-01 22:49:19,236 INFO L78 Accepts]: Start accepts. Automaton has 215808 states and 286581 transitions. Word has length 325 [2023-04-01 22:49:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:19,237 INFO L495 AbstractCegarLoop]: Abstraction has 215808 states and 286581 transitions. [2023-04-01 22:49:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 44.083333333333336) internal successors, (529), 10 states have internal predecessors, (529), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:49:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 215808 states and 286581 transitions. [2023-04-01 22:49:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2023-04-01 22:49:19,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:19,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:49:19,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:19,454 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 [2023-04-01 22:49:19,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:19,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1068503471, now seen corresponding path program 1 times [2023-04-01 22:49:19,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:19,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515040457] [2023-04-01 22:49:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:19,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:19,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:49:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-04-01 22:49:19,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515040457] [2023-04-01 22:49:19,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515040457] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:19,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795691288] [2023-04-01 22:49:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:19,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:19,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:19,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:19,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:49:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:20,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:49:20,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-04-01 22:49:20,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795691288] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:20,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:49:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110342154] [2023-04-01 22:49:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:20,154 INFO L87 Difference]: Start difference. First operand 215808 states and 286581 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:25,721 INFO L93 Difference]: Finished difference Result 429975 states and 571529 transitions. [2023-04-01 22:49:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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 325 [2023-04-01 22:49:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:26,887 INFO L225 Difference]: With dead ends: 429975 [2023-04-01 22:49:26,888 INFO L226 Difference]: Without dead ends: 214177 [2023-04-01 22:49:27,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:49:27,172 INFO L413 NwaCegarLoop]: 1368 mSDtfsCounter, 1205 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:27,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 1469 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:49:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214177 states. [2023-04-01 22:49:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214177 to 208553. [2023-04-01 22:49:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208553 states, 204293 states have (on average 1.0878346296740466) internal successors, (222237), 205298 states have internal predecessors, (222237), 1011 states have call successors, (1011), 1010 states have call predecessors, (1011), 3248 states have return successors, (38134), 2244 states have call predecessors, (38134), 1010 states have call successors, (38134) [2023-04-01 22:49:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208553 states to 208553 states and 261382 transitions. [2023-04-01 22:49:31,709 INFO L78 Accepts]: Start accepts. Automaton has 208553 states and 261382 transitions. Word has length 325 [2023-04-01 22:49:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:31,709 INFO L495 AbstractCegarLoop]: Abstraction has 208553 states and 261382 transitions. [2023-04-01 22:49:31,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:49:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 208553 states and 261382 transitions. [2023-04-01 22:49:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-04-01 22:49:31,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:31,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:31,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:49:31,936 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 [2023-04-01 22:49:31,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:31,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1256328203, now seen corresponding path program 1 times [2023-04-01 22:49:31,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:31,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689540267] [2023-04-01 22:49:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:31,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 22:49:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:32,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689540267] [2023-04-01 22:49:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689540267] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017735829] [2023-04-01 22:49:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:32,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:32,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:49:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:32,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 22:49:32,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 22:49:32,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017735829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:32,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:32,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 22:49:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156730469] [2023-04-01 22:49:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:49:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:49:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:49:32,782 INFO L87 Difference]: Start difference. First operand 208553 states and 261382 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:49:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:39,277 INFO L93 Difference]: Finished difference Result 498198 states and 625883 transitions. [2023-04-01 22:49:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:49:39,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 387 [2023-04-01 22:49:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:40,565 INFO L225 Difference]: With dead ends: 498198 [2023-04-01 22:49:40,565 INFO L226 Difference]: Without dead ends: 278333 [2023-04-01 22:49:40,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:49:40,998 INFO L413 NwaCegarLoop]: 1625 mSDtfsCounter, 968 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:40,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 1762 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 22:49:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278333 states. [2023-04-01 22:49:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278333 to 254181. [2023-04-01 22:49:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254181 states, 249515 states have (on average 1.0777107588722121) internal successors, (268905), 250494 states have internal predecessors, (268905), 1238 states have call successors, (1238), 1238 states have call predecessors, (1238), 3427 states have return successors, (40900), 2448 states have call predecessors, (40900), 1237 states have call successors, (40900) [2023-04-01 22:49:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254181 states to 254181 states and 311043 transitions. [2023-04-01 22:49:46,596 INFO L78 Accepts]: Start accepts. Automaton has 254181 states and 311043 transitions. Word has length 387 [2023-04-01 22:49:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:49:46,597 INFO L495 AbstractCegarLoop]: Abstraction has 254181 states and 311043 transitions. [2023-04-01 22:49:46,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:49:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand 254181 states and 311043 transitions. [2023-04-01 22:49:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-04-01 22:49:46,626 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:49:46,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:49:46,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 22:49:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:46,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:49:46,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:49:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1639001673, now seen corresponding path program 1 times [2023-04-01 22:49:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:49:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215369283] [2023-04-01 22:49:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:49:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:47,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:49:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:47,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:49:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:47,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:49:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:49:48,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:49:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215369283] [2023-04-01 22:49:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215369283] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:49:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091373771] [2023-04-01 22:49:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:49:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:49:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:49:48,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:49:48,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:49:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:49:48,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:49:48,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:49:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:49:48,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:49:48,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091373771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:49:48,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:49:48,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-04-01 22:49:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006347551] [2023-04-01 22:49:48,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:49:48,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:49:48,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:49:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:49:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:49:48,585 INFO L87 Difference]: Start difference. First operand 254181 states and 311043 transitions. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 4 states have internal predecessors, (374), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:49:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:49:56,730 INFO L93 Difference]: Finished difference Result 535146 states and 653339 transitions. [2023-04-01 22:49:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:49:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 4 states have internal predecessors, (374), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 387 [2023-04-01 22:49:56,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:49:57,839 INFO L225 Difference]: With dead ends: 535146 [2023-04-01 22:49:57,839 INFO L226 Difference]: Without dead ends: 281774 [2023-04-01 22:49:58,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:49:58,181 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 2842 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 5151 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2842 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 5151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:49:58,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2842 Valid, 597 Invalid, 5868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 5151 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 22:49:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281774 states. [2023-04-01 22:50:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281774 to 280138. [2023-04-01 22:50:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280138 states, 275116 states have (on average 1.0732999898224749) internal successors, (295282), 276141 states have internal predecessors, (295282), 1366 states have call successors, (1366), 1366 states have call predecessors, (1366), 3655 states have return successors, (42996), 2630 states have call predecessors, (42996), 1365 states have call successors, (42996) [2023-04-01 22:50:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280138 states to 280138 states and 339644 transitions. [2023-04-01 22:50:03,760 INFO L78 Accepts]: Start accepts. Automaton has 280138 states and 339644 transitions. Word has length 387 [2023-04-01 22:50:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:50:03,761 INFO L495 AbstractCegarLoop]: Abstraction has 280138 states and 339644 transitions. [2023-04-01 22:50:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 4 states have internal predecessors, (374), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:50:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 280138 states and 339644 transitions. [2023-04-01 22:50:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-04-01 22:50:03,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:50:03,775 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:50:03,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:50:03,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:03,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:50:03,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:50:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1973657434, now seen corresponding path program 1 times [2023-04-01 22:50:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:50:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144866267] [2023-04-01 22:50:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:50:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:50:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:50:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:50:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2023-04-01 22:50:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 119 proven. 132 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 22:50:04,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:50:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144866267] [2023-04-01 22:50:04,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144866267] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:50:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264930579] [2023-04-01 22:50:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:50:04,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:50:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:50:04,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:50:04,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:50:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:50:04,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:50:04,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:50:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-01 22:50:05,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:50:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 26 proven. 321 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 22:50:06,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264930579] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:50:06,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:50:06,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-04-01 22:50:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48722861] [2023-04-01 22:50:06,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:50:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 22:50:06,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:50:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 22:50:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 22:50:06,164 INFO L87 Difference]: Start difference. First operand 280138 states and 339644 transitions. Second operand has 17 states, 17 states have (on average 50.411764705882355) internal successors, (857), 15 states have internal predecessors, (857), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:50:40,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:50:40,943 INFO L93 Difference]: Finished difference Result 780119 states and 991717 transitions. [2023-04-01 22:50:40,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-04-01 22:50:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 50.411764705882355) internal successors, (857), 15 states have internal predecessors, (857), 7 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 423 [2023-04-01 22:50:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:50:43,301 INFO L225 Difference]: With dead ends: 780119 [2023-04-01 22:50:43,301 INFO L226 Difference]: Without dead ends: 491640 [2023-04-01 22:50:43,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 957 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7305 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2571, Invalid=16611, Unknown=0, NotChecked=0, Total=19182 [2023-04-01 22:50:43,620 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 16195 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 31950 mSolverCounterSat, 7129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16198 SdHoareTripleChecker+Valid, 2546 SdHoareTripleChecker+Invalid, 39079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7129 IncrementalHoareTripleChecker+Valid, 31950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:50:43,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16198 Valid, 2546 Invalid, 39079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7129 Valid, 31950 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2023-04-01 22:50:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491640 states.