/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/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:44:18,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:44:18,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:44:18,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:44:18,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:44:18,710 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:44:18,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:44:18,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:44:18,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:44:18,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:44:18,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:44:18,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:44:18,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:44:18,712 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:44:18,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:44:18,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:44:18,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:44:18,714 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:44:18,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:44:18,714 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:44:18,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:44:18,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:44:18,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:44:18,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:44:18,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:18,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:44:18,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:44:18,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:44:18,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:44:18,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:44:18,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:44:18,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:44:18,717 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:44:18,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:44:18,717 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:44:18,717 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:44:18,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:44:18,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:44:18,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:44:18,980 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:44:18,980 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:44:18,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-03-30 22:44:20,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:44:20,551 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:44:20,551 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2023-03-30 22:44:20,569 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/446f23591/d9858c55cea243a8a7269162142d5305/FLAG32ba3722a [2023-03-30 22:44:20,585 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/446f23591/d9858c55cea243a8a7269162142d5305 [2023-03-30 22:44:20,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:44:20,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:44:20,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:20,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:44:20,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:44:20,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:20" (1/1) ... [2023-03-30 22:44:20,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40064e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:20, skipping insertion in model container [2023-03-30 22:44:20,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:44:20" (1/1) ... [2023-03-30 22:44:20,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:44:20,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:44:21,159 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/Problem03_label13.c[55139,55152] [2023-03-30 22:44:21,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:21,203 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:44:21,422 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/Problem03_label13.c[55139,55152] [2023-03-30 22:44:21,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:44:21,455 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:44:21,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21 WrapperNode [2023-03-30 22:44:21,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:44:21,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:44:21,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:44:21,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:44:21,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:44:21,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:44:21,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:44:21,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:44:21,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (1/1) ... [2023-03-30 22:44:21,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:44:21,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:21,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:44:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:44:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:44:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:44:21,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:44:21,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 22:44:21,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 22:44:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:44:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:44:21,805 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:44:21,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:44:23,389 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:44:23,404 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:44:23,404 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 22:44:23,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:23 BoogieIcfgContainer [2023-03-30 22:44:23,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:44:23,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:44:23,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:44:23,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:44:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:44:20" (1/3) ... [2023-03-30 22:44:23,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf1ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:23, skipping insertion in model container [2023-03-30 22:44:23,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:44:21" (2/3) ... [2023-03-30 22:44:23,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bf1ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:44:23, skipping insertion in model container [2023-03-30 22:44:23,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:44:23" (3/3) ... [2023-03-30 22:44:23,417 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2023-03-30 22:44:23,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:44:23,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:44:23,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:44:23,504 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;@4e6a17f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:44:23,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:44:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:44:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-30 22:44:23,533 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:23,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:23,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:23,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash -245912111, now seen corresponding path program 1 times [2023-03-30 22:44:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068953634] [2023-03-30 22:44:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068953634] [2023-03-30 22:44:24,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068953634] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:24,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:24,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:44:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819030589] [2023-03-30 22:44:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:44:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:44:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:44:24,871 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:44:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:27,035 INFO L93 Difference]: Finished difference Result 858 states and 1518 transitions. [2023-03-30 22:44:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:44:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 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 161 [2023-03-30 22:44:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:27,049 INFO L225 Difference]: With dead ends: 858 [2023-03-30 22:44:27,049 INFO L226 Difference]: Without dead ends: 483 [2023-03-30 22:44:27,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 22:44:27,057 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 676 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:27,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 54 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 22:44:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-03-30 22:44:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 465. [2023-03-30 22:44:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 457 states have internal predecessors, (732), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 22:44:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 743 transitions. [2023-03-30 22:44:27,131 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 743 transitions. Word has length 161 [2023-03-30 22:44:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:27,132 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 743 transitions. [2023-03-30 22:44:27,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:44:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 743 transitions. [2023-03-30 22:44:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-30 22:44:27,136 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:27,137 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:27,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:44:27,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:27,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1234241381, now seen corresponding path program 1 times [2023-03-30 22:44:27,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:27,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269114784] [2023-03-30 22:44:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:27,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:27,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269114784] [2023-03-30 22:44:27,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269114784] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:27,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:44:27,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:44:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673037326] [2023-03-30 22:44:27,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:27,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 22:44:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 22:44:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 22:44:27,760 INFO L87 Difference]: Start difference. First operand 465 states and 743 transitions. Second operand has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:44:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:29,642 INFO L93 Difference]: Finished difference Result 1398 states and 2265 transitions. [2023-03-30 22:44:29,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:44:29,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 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 170 [2023-03-30 22:44:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:29,650 INFO L225 Difference]: With dead ends: 1398 [2023-03-30 22:44:29,650 INFO L226 Difference]: Without dead ends: 939 [2023-03-30 22:44:29,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:29,658 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1309 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:29,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 122 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-30 22:44:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-03-30 22:44:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 916. [2023-03-30 22:44:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.5223214285714286) internal successors, (1364), 904 states have internal predecessors, (1364), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-03-30 22:44:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1395 transitions. [2023-03-30 22:44:29,736 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1395 transitions. Word has length 170 [2023-03-30 22:44:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:29,742 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1395 transitions. [2023-03-30 22:44:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 27.333333333333332) internal successors, (164), 4 states have internal predecessors, (164), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:44:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1395 transitions. [2023-03-30 22:44:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-03-30 22:44:29,749 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:29,749 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:29,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:44:29,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:29,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2034937463, now seen corresponding path program 1 times [2023-03-30 22:44:29,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:29,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916925718] [2023-03-30 22:44:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:29,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:30,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:30,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:30,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916925718] [2023-03-30 22:44:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916925718] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800675354] [2023-03-30 22:44:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:30,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:30,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:44:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:30,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:44:30,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:44:30,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:44:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-30 22:44:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800675354] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:31,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:44:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2023-03-30 22:44:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264202487] [2023-03-30 22:44:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:44:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:44:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:31,205 INFO L87 Difference]: Start difference. First operand 916 states and 1395 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:44:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:31,980 INFO L93 Difference]: Finished difference Result 2719 states and 4214 transitions. [2023-03-30 22:44:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:44:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 172 [2023-03-30 22:44:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:31,990 INFO L225 Difference]: With dead ends: 2719 [2023-03-30 22:44:31,990 INFO L226 Difference]: Without dead ends: 1809 [2023-03-30 22:44:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:31,997 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 411 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:31,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 121 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:44:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2023-03-30 22:44:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2023-03-30 22:44:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1763 states have (on average 1.4356211003970505) internal successors, (2531), 1787 states have internal predecessors, (2531), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (109), 9 states have call predecessors, (109), 9 states have call successors, (109) [2023-03-30 22:44:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2650 transitions. [2023-03-30 22:44:32,070 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2650 transitions. Word has length 172 [2023-03-30 22:44:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:32,071 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2650 transitions. [2023-03-30 22:44:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 22:44:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2650 transitions. [2023-03-30 22:44:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-03-30 22:44:32,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:32,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:32,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:32,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:32,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:32,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1855169696, now seen corresponding path program 1 times [2023-03-30 22:44:32,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:32,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359241100] [2023-03-30 22:44:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:32,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:33,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:33,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-03-30 22:44:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:44:33,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:33,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359241100] [2023-03-30 22:44:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359241100] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847165272] [2023-03-30 22:44:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:33,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:33,461 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:33,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:44:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:33,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:44:33,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-30 22:44:33,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:33,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847165272] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:33,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:33,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-03-30 22:44:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267699830] [2023-03-30 22:44:33,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:33,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:44:33,784 INFO L87 Difference]: Start difference. First operand 1807 states and 2650 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:44:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:34,168 INFO L93 Difference]: Finished difference Result 5473 states and 8321 transitions. [2023-03-30 22:44:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 184 [2023-03-30 22:44:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:34,191 INFO L225 Difference]: With dead ends: 5473 [2023-03-30 22:44:34,191 INFO L226 Difference]: Without dead ends: 3672 [2023-03-30 22:44:34,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:34,199 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 1093 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:34,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 919 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 22:44:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2023-03-30 22:44:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3634. [2023-03-30 22:44:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3528 states have (on average 1.433673469387755) internal successors, (5058), 3598 states have internal predecessors, (5058), 18 states have call successors, (18), 18 states have call predecessors, (18), 87 states have return successors, (365), 17 states have call predecessors, (365), 17 states have call successors, (365) [2023-03-30 22:44:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5441 transitions. [2023-03-30 22:44:34,346 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5441 transitions. Word has length 184 [2023-03-30 22:44:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:34,347 INFO L495 AbstractCegarLoop]: Abstraction has 3634 states and 5441 transitions. [2023-03-30 22:44:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:44:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5441 transitions. [2023-03-30 22:44:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-03-30 22:44:34,359 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:34,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:34,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 22:44:34,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:34,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash 63486017, now seen corresponding path program 1 times [2023-03-30 22:44:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796285224] [2023-03-30 22:44:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:35,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-03-30 22:44:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 22:44:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796285224] [2023-03-30 22:44:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796285224] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137879270] [2023-03-30 22:44:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:35,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:35,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:44:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:35,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:44:35,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-30 22:44:35,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137879270] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:35,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 22:44:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021071473] [2023-03-30 22:44:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 22:44:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 22:44:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:35,519 INFO L87 Difference]: Start difference. First operand 3634 states and 5441 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 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) [2023-03-30 22:44:36,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:36,660 INFO L93 Difference]: Finished difference Result 10920 states and 17609 transitions. [2023-03-30 22:44:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:44:36,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 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 191 [2023-03-30 22:44:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:36,698 INFO L225 Difference]: With dead ends: 10920 [2023-03-30 22:44:36,698 INFO L226 Difference]: Without dead ends: 7292 [2023-03-30 22:44:36,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:36,708 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 710 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:36,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 150 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 22:44:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7292 states. [2023-03-30 22:44:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7292 to 7164. [2023-03-30 22:44:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 6917 states have (on average 1.313719820731531) internal successors, (9087), 7096 states have internal predecessors, (9087), 34 states have call successors, (34), 34 states have call predecessors, (34), 212 states have return successors, (1077), 33 states have call predecessors, (1077), 33 states have call successors, (1077) [2023-03-30 22:44:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 10198 transitions. [2023-03-30 22:44:37,021 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 10198 transitions. Word has length 191 [2023-03-30 22:44:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:37,021 INFO L495 AbstractCegarLoop]: Abstraction has 7164 states and 10198 transitions. [2023-03-30 22:44:37,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 states have internal predecessors, (176), 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) [2023-03-30 22:44:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 10198 transitions. [2023-03-30 22:44:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-03-30 22:44:37,036 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:37,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:44:37,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:37,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:37,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:37,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash -660011107, now seen corresponding path program 1 times [2023-03-30 22:44:37,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:37,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815419665] [2023-03-30 22:44:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:37,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:37,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:37,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:37,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:37,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815419665] [2023-03-30 22:44:37,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815419665] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:37,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660349132] [2023-03-30 22:44:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:37,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:37,726 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:37,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:44:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:37,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:37,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:38,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:44:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:44:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660349132] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:44:38,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:44:38,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:44:38,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324501409] [2023-03-30 22:44:38,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:44:38,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:44:38,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:44:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:44:38,077 INFO L87 Difference]: Start difference. First operand 7164 states and 10198 transitions. Second operand has 12 states, 12 states have (on average 17.0) internal successors, (204), 10 states have internal predecessors, (204), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 22:44:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:47,007 INFO L93 Difference]: Finished difference Result 31940 states and 56137 transitions. [2023-03-30 22:44:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-03-30 22:44:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.0) internal successors, (204), 10 states have internal predecessors, (204), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 193 [2023-03-30 22:44:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:47,226 INFO L225 Difference]: With dead ends: 31940 [2023-03-30 22:44:47,226 INFO L226 Difference]: Without dead ends: 24778 [2023-03-30 22:44:47,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=565, Invalid=2857, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 22:44:47,274 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 2759 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 8142 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2780 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 9176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 8142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:47,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2780 Valid, 455 Invalid, 9176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 8142 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-30 22:44:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24778 states. [2023-03-30 22:44:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24778 to 23640. [2023-03-30 22:44:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23640 states, 22903 states have (on average 1.1960005239488276) internal successors, (27392), 23393 states have internal predecessors, (27392), 137 states have call successors, (137), 110 states have call predecessors, (137), 599 states have return successors, (3780), 136 states have call predecessors, (3780), 136 states have call successors, (3780) [2023-03-30 22:44:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23640 states to 23640 states and 31309 transitions. [2023-03-30 22:44:48,551 INFO L78 Accepts]: Start accepts. Automaton has 23640 states and 31309 transitions. Word has length 193 [2023-03-30 22:44:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:48,551 INFO L495 AbstractCegarLoop]: Abstraction has 23640 states and 31309 transitions. [2023-03-30 22:44:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.0) internal successors, (204), 10 states have internal predecessors, (204), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 22:44:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23640 states and 31309 transitions. [2023-03-30 22:44:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-03-30 22:44:48,592 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:48,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:48,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:48,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:48,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:48,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -813713655, now seen corresponding path program 1 times [2023-03-30 22:44:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110682902] [2023-03-30 22:44:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:49,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:44:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:44:49,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110682902] [2023-03-30 22:44:49,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110682902] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678072487] [2023-03-30 22:44:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:49,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:49,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:44:49,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:44:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:49,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:44:49,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-30 22:44:49,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678072487] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:49,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 22:44:49,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833975547] [2023-03-30 22:44:49,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:49,832 INFO L87 Difference]: Start difference. First operand 23640 states and 31309 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:44:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:51,251 INFO L93 Difference]: Finished difference Result 61988 states and 83095 transitions. [2023-03-30 22:44:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 199 [2023-03-30 22:44:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:51,424 INFO L225 Difference]: With dead ends: 61988 [2023-03-30 22:44:51,424 INFO L226 Difference]: Without dead ends: 44400 [2023-03-30 22:44:51,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:44:51,462 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 93 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:51,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 256 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:44:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44400 states. [2023-03-30 22:44:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44400 to 43058. [2023-03-30 22:44:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43058 states, 41968 states have (on average 1.1991040792985133) internal successors, (50324), 42613 states have internal predecessors, (50324), 243 states have call successors, (243), 202 states have call predecessors, (243), 846 states have return successors, (7496), 242 states have call predecessors, (7496), 242 states have call successors, (7496) [2023-03-30 22:44:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43058 states to 43058 states and 58063 transitions. [2023-03-30 22:44:53,003 INFO L78 Accepts]: Start accepts. Automaton has 43058 states and 58063 transitions. Word has length 199 [2023-03-30 22:44:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:53,004 INFO L495 AbstractCegarLoop]: Abstraction has 43058 states and 58063 transitions. [2023-03-30 22:44:53,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:44:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43058 states and 58063 transitions. [2023-03-30 22:44:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-03-30 22:44:53,072 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:53,072 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:44:53,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:53,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:53,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:44:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 284177057, now seen corresponding path program 1 times [2023-03-30 22:44:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:44:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412413132] [2023-03-30 22:44:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:44:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:54,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:44:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:54,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:44:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:54,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-03-30 22:44:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 22:44:54,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:44:54,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412413132] [2023-03-30 22:44:54,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412413132] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:44:54,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500114595] [2023-03-30 22:44:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:44:54,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:54,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:44:54,556 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) [2023-03-30 22:44:54,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:44:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:44:54,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 22:44:54,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:44:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-30 22:44:55,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 22:44:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500114595] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:44:55,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 22:44:55,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-03-30 22:44:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843021676] [2023-03-30 22:44:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:44:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:44:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:44:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:44:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:55,115 INFO L87 Difference]: Start difference. First operand 43058 states and 58063 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:44:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:44:56,672 INFO L93 Difference]: Finished difference Result 117398 states and 159425 transitions. [2023-03-30 22:44:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:44:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 207 [2023-03-30 22:44:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:44:56,965 INFO L225 Difference]: With dead ends: 117398 [2023-03-30 22:44:56,965 INFO L226 Difference]: Without dead ends: 74358 [2023-03-30 22:44:57,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-30 22:44:57,061 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 101 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:44:57,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 425 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:44:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74358 states. [2023-03-30 22:44:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74358 to 69961. [2023-03-30 22:44:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69961 states, 68528 states have (on average 1.1685296521130049) internal successors, (80077), 69250 states have internal predecessors, (80077), 380 states have call successors, (380), 331 states have call predecessors, (380), 1052 states have return successors, (10981), 379 states have call predecessors, (10981), 379 states have call successors, (10981) [2023-03-30 22:44:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69961 states to 69961 states and 91438 transitions. [2023-03-30 22:44:59,671 INFO L78 Accepts]: Start accepts. Automaton has 69961 states and 91438 transitions. Word has length 207 [2023-03-30 22:44:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:44:59,671 INFO L495 AbstractCegarLoop]: Abstraction has 69961 states and 91438 transitions. [2023-03-30 22:44:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:44:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 69961 states and 91438 transitions. [2023-03-30 22:44:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-03-30 22:44:59,778 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:44:59,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1] [2023-03-30 22:44:59,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 22:44:59,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:44:59,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:44:59,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:45:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -306540852, now seen corresponding path program 1 times [2023-03-30 22:45:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:45:00,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763201678] [2023-03-30 22:45:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:45:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:45:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 22:45:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-30 22:45:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-03-30 22:45:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-03-30 22:45:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 88 proven. 30 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-30 22:45:00,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:45:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763201678] [2023-03-30 22:45:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763201678] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:45:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052135491] [2023-03-30 22:45:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:45:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:45:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:45:00,893 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) [2023-03-30 22:45:00,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:45:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:45:01,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 22:45:01,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:45:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-30 22:45:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:45:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 106 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-03-30 22:45:01,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052135491] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:45:01,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:45:01,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 22:45:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329021682] [2023-03-30 22:45:01,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:45:01,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:45:01,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:45:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:45:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:45:01,347 INFO L87 Difference]: Start difference. First operand 69961 states and 91438 transitions. Second operand has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 10 states have internal predecessors, (239), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-03-30 22:45:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:45:08,041 INFO L93 Difference]: Finished difference Result 232715 states and 325600 transitions. [2023-03-30 22:45:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 22:45:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 10 states have internal predecessors, (239), 4 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 240 [2023-03-30 22:45:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted.