/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/Problem15_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:03:45,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:03:45,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:03:45,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:03:45,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:03:45,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:03:45,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:03:45,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:03:45,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:03:45,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:03:45,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:03:45,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:03:45,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:03:45,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:03:45,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:03:45,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:03:45,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 23:03:45,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:03:45,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:03:45,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:03:45,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:03:45,735 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:03:45,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:03:45,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:03:45,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:03:45,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:03:45,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:03:45,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:03:45,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:03:45,736 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:03:45,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:03:45,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:03:45,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:03:45,738 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:03:45,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:03:45,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:03:45,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:03:45,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:03:45,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:03:45,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:03:45,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:03:45,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:03:45,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:03:45,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:03:45,741 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:03:45,741 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:03:45,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:03:46,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:03:46,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:03:46,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:03:46,013 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:03:46,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2023-04-01 23:03:47,163 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:03:47,501 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:03:47,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2023-04-01 23:03:47,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d95d350/342e856217c748d79ac8a8b1312e87b1/FLAGdc6f6eb28 [2023-04-01 23:03:47,534 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d95d350/342e856217c748d79ac8a8b1312e87b1 [2023-04-01 23:03:47,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:03:47,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:03:47,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:03:47,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:03:47,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:03:47,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:47" (1/1) ... [2023-04-01 23:03:47,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13cb66f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:47, skipping insertion in model container [2023-04-01 23:03:47,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:47" (1/1) ... [2023-04-01 23:03:47,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:03:47,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:03:47,823 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/Problem15_label36.c[7434,7447] [2023-04-01 23:03:48,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:03:48,238 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:03:48,266 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/Problem15_label36.c[7434,7447] [2023-04-01 23:03:48,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:03:48,494 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:03:48,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48 WrapperNode [2023-04-01 23:03:48,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:03:48,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:03:48,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:03:48,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:03:48,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:03:48,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:03:48,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:03:48,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:03:48,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (1/1) ... [2023-04-01 23:03:48,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:03:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:03:48,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:03:48,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:03:48,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:03:48,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:03:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:03:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:03:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:03:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:03:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:03:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:03:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:03:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:03:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:03:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:03:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:03:48,840 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:03:48,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:03:51,443 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:03:51,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:03:51,465 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:03:51,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:51 BoogieIcfgContainer [2023-04-01 23:03:51,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:03:51,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:03:51,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:03:51,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:03:51,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:03:47" (1/3) ... [2023-04-01 23:03:51,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1496304a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:51, skipping insertion in model container [2023-04-01 23:03:51,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:48" (2/3) ... [2023-04-01 23:03:51,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1496304a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:51, skipping insertion in model container [2023-04-01 23:03:51,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:51" (3/3) ... [2023-04-01 23:03:51,477 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label36.c [2023-04-01 23:03:51,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:03:51,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:03:51,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:03:51,583 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;@783f4383, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:03:51,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:03:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:03:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 23:03:51,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:03:51,607 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] [2023-04-01 23:03:51,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:03:51,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:03:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1306316122, now seen corresponding path program 1 times [2023-04-01 23:03:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:03:51,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813316] [2023-04-01 23:03:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:03:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:03:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:03:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:03:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:03:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:03:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:03:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813316] [2023-04-01 23:03:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:03:52,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:03:52,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:03:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321504078] [2023-04-01 23:03:52,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:03:52,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:03:52,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:03:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:03:52,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:03:52,174 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:03:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:03:55,108 INFO L93 Difference]: Finished difference Result 1203 states and 2166 transitions. [2023-04-01 23:03:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:03:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 67 [2023-04-01 23:03:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:03:55,133 INFO L225 Difference]: With dead ends: 1203 [2023-04-01 23:03:55,134 INFO L226 Difference]: Without dead ends: 702 [2023-04-01 23:03:55,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:03:55,146 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1010 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:03:55,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 85 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 23:03:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-04-01 23:03:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 696. [2023-04-01 23:03:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 680 states have (on average 1.4676470588235293) internal successors, (998), 682 states have internal predecessors, (998), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 23:03:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1015 transitions. [2023-04-01 23:03:55,245 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1015 transitions. Word has length 67 [2023-04-01 23:03:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:03:55,245 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1015 transitions. [2023-04-01 23:03:55,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:03:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1015 transitions. [2023-04-01 23:03:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 23:03:55,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:03:55,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:03:55,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:03:55,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:03:55,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:03:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -42143899, now seen corresponding path program 1 times [2023-04-01 23:03:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:03:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382418658] [2023-04-01 23:03:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:03:55,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:03:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:03:55,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:03:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:03:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:03:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:03:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:03:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:03:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382418658] [2023-04-01 23:03:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382418658] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:03:55,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:03:55,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:03:55,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146568358] [2023-04-01 23:03:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:03:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:03:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:03:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:03:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:03:55,834 INFO L87 Difference]: Start difference. First operand 696 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 4 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:04:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:00,146 INFO L93 Difference]: Finished difference Result 2072 states and 3048 transitions. [2023-04-01 23:04:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:04:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 4 states have internal predecessors, (140), 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 146 [2023-04-01 23:04:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:00,154 INFO L225 Difference]: With dead ends: 2072 [2023-04-01 23:04:00,154 INFO L226 Difference]: Without dead ends: 1382 [2023-04-01 23:04:00,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:04:00,157 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1016 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3207 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:00,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 241 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3207 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:04:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-04-01 23:04:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1359. [2023-04-01 23:04:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1323 states have (on average 1.3862433862433863) internal successors, (1834), 1334 states have internal predecessors, (1834), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (45), 14 states have call predecessors, (45), 9 states have call successors, (45) [2023-04-01 23:04:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1889 transitions. [2023-04-01 23:04:00,203 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1889 transitions. Word has length 146 [2023-04-01 23:04:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:00,203 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1889 transitions. [2023-04-01 23:04:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.333333333333332) internal successors, (140), 4 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:04:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1889 transitions. [2023-04-01 23:04:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 23:04:00,207 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:00,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:04:00,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:00,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 96600941, now seen corresponding path program 1 times [2023-04-01 23:04:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471065480] [2023-04-01 23:04:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:04:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471065480] [2023-04-01 23:04:00,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471065480] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:00,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:04:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:04:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137412082] [2023-04-01 23:04:00,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:00,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:04:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:04:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:04:00,611 INFO L87 Difference]: Start difference. First operand 1359 states and 1889 transitions. Second operand has 7 states, 6 states have (on average 24.0) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:04:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:03,716 INFO L93 Difference]: Finished difference Result 4068 states and 5764 transitions. [2023-04-01 23:04:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:04:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.0) internal successors, (144), 4 states have internal predecessors, (144), 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 150 [2023-04-01 23:04:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:03,729 INFO L225 Difference]: With dead ends: 4068 [2023-04-01 23:04:03,729 INFO L226 Difference]: Without dead ends: 2715 [2023-04-01 23:04:03,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:04:03,734 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1274 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:03,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 169 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 23:04:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2023-04-01 23:04:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2338. [2023-04-01 23:04:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2265 states have (on average 1.2710816777041942) internal successors, (2879), 2298 states have internal predecessors, (2879), 16 states have call successors, (16), 16 states have call predecessors, (16), 56 states have return successors, (109), 23 states have call predecessors, (109), 15 states have call successors, (109) [2023-04-01 23:04:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3004 transitions. [2023-04-01 23:04:03,837 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3004 transitions. Word has length 150 [2023-04-01 23:04:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:03,838 INFO L495 AbstractCegarLoop]: Abstraction has 2338 states and 3004 transitions. [2023-04-01 23:04:03,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.0) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:04:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3004 transitions. [2023-04-01 23:04:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-01 23:04:03,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:03,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2023-04-01 23:04:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:04:03,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:03,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 977500708, now seen corresponding path program 1 times [2023-04-01 23:04:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:03,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217187340] [2023-04-01 23:04:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:04,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:04:04,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217187340] [2023-04-01 23:04:04,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217187340] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593575672] [2023-04-01 23:04:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:04,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:04,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:04:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:04,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:04,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:04:04,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:04:04,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593575672] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:04,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:04:04,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:04:04,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144828200] [2023-04-01 23:04:04,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:04,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:04:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:04:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:04:04,640 INFO L87 Difference]: Start difference. First operand 2338 states and 3004 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:04:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:06,299 INFO L93 Difference]: Finished difference Result 5922 states and 7869 transitions. [2023-04-01 23:04:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:04:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 267 [2023-04-01 23:04:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:06,319 INFO L225 Difference]: With dead ends: 5922 [2023-04-01 23:04:06,319 INFO L226 Difference]: Without dead ends: 3590 [2023-04-01 23:04:06,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:04:06,332 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 316 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:06,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 222 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:04:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2023-04-01 23:04:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3587. [2023-04-01 23:04:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3489 states have (on average 1.2593866437374606) internal successors, (4394), 3530 states have internal predecessors, (4394), 24 states have call successors, (24), 24 states have call predecessors, (24), 73 states have return successors, (220), 32 states have call predecessors, (220), 23 states have call successors, (220) [2023-04-01 23:04:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 4638 transitions. [2023-04-01 23:04:06,431 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 4638 transitions. Word has length 267 [2023-04-01 23:04:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 3587 states and 4638 transitions. [2023-04-01 23:04:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:04:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 4638 transitions. [2023-04-01 23:04:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-04-01 23:04:06,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:06,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:06,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:06,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:06,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 786463687, now seen corresponding path program 1 times [2023-04-01 23:04:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493933231] [2023-04-01 23:04:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:07,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:07,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:04:07,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493933231] [2023-04-01 23:04:07,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493933231] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:07,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554212897] [2023-04-01 23:04:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:07,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:07,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:04:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:07,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:04:07,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:04:08,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 23:04:09,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554212897] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:09,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:04:09,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-04-01 23:04:09,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709643243] [2023-04-01 23:04:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:09,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:04:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:04:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:04:09,719 INFO L87 Difference]: Start difference. First operand 3587 states and 4638 transitions. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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) [2023-04-01 23:04:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:11,470 INFO L93 Difference]: Finished difference Result 9999 states and 13119 transitions. [2023-04-01 23:04:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 23:04:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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 435 [2023-04-01 23:04:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:11,520 INFO L225 Difference]: With dead ends: 9999 [2023-04-01 23:04:11,520 INFO L226 Difference]: Without dead ends: 6418 [2023-04-01 23:04:11,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:04:11,529 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 455 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:11,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 152 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:04:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2023-04-01 23:04:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 5796. [2023-04-01 23:04:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5641 states have (on average 1.2277964899840454) internal successors, (6926), 5708 states have internal predecessors, (6926), 38 states have call successors, (38), 38 states have call predecessors, (38), 116 states have return successors, (498), 49 states have call predecessors, (498), 37 states have call successors, (498) [2023-04-01 23:04:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 7462 transitions. [2023-04-01 23:04:11,662 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 7462 transitions. Word has length 435 [2023-04-01 23:04:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:11,663 INFO L495 AbstractCegarLoop]: Abstraction has 5796 states and 7462 transitions. [2023-04-01 23:04:11,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.0) internal successors, (260), 3 states have internal predecessors, (260), 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) [2023-04-01 23:04:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 7462 transitions. [2023-04-01 23:04:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-04-01 23:04:11,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:11,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:11,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:11,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:11,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -863075320, now seen corresponding path program 1 times [2023-04-01 23:04:11,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414014532] [2023-04-01 23:04:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:04:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:04:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414014532] [2023-04-01 23:04:12,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414014532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881903022] [2023-04-01 23:04:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:12,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:12,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:12,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:12,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:04:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:12,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:12,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:04:12,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:04:13,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881903022] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:04:13,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:04:13,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:04:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466160390] [2023-04-01 23:04:13,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:04:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:04:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:04:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:04:13,027 INFO L87 Difference]: Start difference. First operand 5796 states and 7462 transitions. Second operand has 11 states, 11 states have (on average 45.81818181818182) internal successors, (504), 9 states have internal predecessors, (504), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:04:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:17,438 INFO L93 Difference]: Finished difference Result 13963 states and 18400 transitions. [2023-04-01 23:04:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 23:04:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 45.81818181818182) internal successors, (504), 9 states have internal predecessors, (504), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 460 [2023-04-01 23:04:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:17,471 INFO L225 Difference]: With dead ends: 13963 [2023-04-01 23:04:17,471 INFO L226 Difference]: Without dead ends: 8173 [2023-04-01 23:04:17,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 936 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:04:17,485 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1886 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4876 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 5644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 4876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:17,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1892 Valid, 256 Invalid, 5644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 4876 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 23:04:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8173 states. [2023-04-01 23:04:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8173 to 7182. [2023-04-01 23:04:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 6938 states have (on average 1.1676275583741713) internal successors, (8101), 7070 states have internal predecessors, (8101), 46 states have call successors, (46), 46 states have call predecessors, (46), 197 states have return successors, (682), 65 states have call predecessors, (682), 45 states have call successors, (682) [2023-04-01 23:04:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 8829 transitions. [2023-04-01 23:04:17,678 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 8829 transitions. Word has length 460 [2023-04-01 23:04:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 7182 states and 8829 transitions. [2023-04-01 23:04:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.81818181818182) internal successors, (504), 9 states have internal predecessors, (504), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:04:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 8829 transitions. [2023-04-01 23:04:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-04-01 23:04:17,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:17,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:17,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:17,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:17,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:17,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1794910183, now seen corresponding path program 1 times [2023-04-01 23:04:17,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:17,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269327197] [2023-04-01 23:04:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:17,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2023-04-01 23:04:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 305 proven. 82 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:04:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269327197] [2023-04-01 23:04:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269327197] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328199836] [2023-04-01 23:04:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:18,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:18,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:18,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:18,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:04:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:18,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:18,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 23:04:19,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 23:04:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328199836] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:04:19,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:04:19,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:04:19,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51924852] [2023-04-01 23:04:19,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:04:19,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:04:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:04:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:04:19,338 INFO L87 Difference]: Start difference. First operand 7182 states and 8829 transitions. Second operand has 11 states, 11 states have (on average 50.27272727272727) internal successors, (553), 9 states have internal predecessors, (553), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:04:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:23,850 INFO L93 Difference]: Finished difference Result 22331 states and 28950 transitions. [2023-04-01 23:04:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:04:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 50.27272727272727) internal successors, (553), 9 states have internal predecessors, (553), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 476 [2023-04-01 23:04:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:23,905 INFO L225 Difference]: With dead ends: 22331 [2023-04-01 23:04:23,905 INFO L226 Difference]: Without dead ends: 15155 [2023-04-01 23:04:23,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 965 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-04-01 23:04:23,926 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 4306 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 4132 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4310 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 4132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:23,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4310 Valid, 411 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 4132 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:04:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15155 states. [2023-04-01 23:04:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15155 to 15052. [2023-04-01 23:04:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15052 states, 14503 states have (on average 1.1496931669309798) internal successors, (16674), 14833 states have internal predecessors, (16674), 94 states have call successors, (94), 94 states have call predecessors, (94), 454 states have return successors, (1664), 124 states have call predecessors, (1664), 93 states have call successors, (1664) [2023-04-01 23:04:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15052 states to 15052 states and 18432 transitions. [2023-04-01 23:04:24,344 INFO L78 Accepts]: Start accepts. Automaton has 15052 states and 18432 transitions. Word has length 476 [2023-04-01 23:04:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:24,345 INFO L495 AbstractCegarLoop]: Abstraction has 15052 states and 18432 transitions. [2023-04-01 23:04:24,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 50.27272727272727) internal successors, (553), 9 states have internal predecessors, (553), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:04:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 15052 states and 18432 transitions. [2023-04-01 23:04:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-04-01 23:04:24,355 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:24,356 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:04:24,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:24,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:24,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:24,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 931942176, now seen corresponding path program 1 times [2023-04-01 23:04:24,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:24,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199440187] [2023-04-01 23:04:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:24,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:24,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:24,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:24,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:24,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:04:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-04-01 23:04:24,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:24,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199440187] [2023-04-01 23:04:24,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199440187] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:24,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:04:24,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 23:04:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901337571] [2023-04-01 23:04:24,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:04:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:04:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:04:24,960 INFO L87 Difference]: Start difference. First operand 15052 states and 18432 transitions. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 3 states have internal predecessors, (267), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:26,798 INFO L93 Difference]: Finished difference Result 30411 states and 37224 transitions. [2023-04-01 23:04:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:04:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 3 states have internal predecessors, (267), 2 states have call successors, (4), 4 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 506 [2023-04-01 23:04:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:26,843 INFO L225 Difference]: With dead ends: 30411 [2023-04-01 23:04:26,843 INFO L226 Difference]: Without dead ends: 15365 [2023-04-01 23:04:26,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:04:26,869 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1761 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:26,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 81 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:04:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15365 states. [2023-04-01 23:04:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15365 to 15042. [2023-04-01 23:04:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 14495 states have (on average 1.1493618489134185) internal successors, (16660), 14823 states have internal predecessors, (16660), 94 states have call successors, (94), 94 states have call predecessors, (94), 452 states have return successors, (1653), 124 states have call predecessors, (1653), 93 states have call successors, (1653) [2023-04-01 23:04:27,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 18407 transitions. [2023-04-01 23:04:27,223 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 18407 transitions. Word has length 506 [2023-04-01 23:04:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:27,224 INFO L495 AbstractCegarLoop]: Abstraction has 15042 states and 18407 transitions. [2023-04-01 23:04:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 3 states have internal predecessors, (267), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 18407 transitions. [2023-04-01 23:04:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2023-04-01 23:04:27,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:27,235 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:04:27,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 23:04:27,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:27,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1991693868, now seen corresponding path program 1 times [2023-04-01 23:04:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:27,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366499433] [2023-04-01 23:04:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:04:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2023-04-01 23:04:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 476 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-04-01 23:04:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366499433] [2023-04-01 23:04:27,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366499433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:27,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487430805] [2023-04-01 23:04:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:27,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:27,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:27,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:04:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:28,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:28,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-01 23:04:28,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 479 proven. 2 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-04-01 23:04:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487430805] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:04:28,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:04:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 23:04:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158111355] [2023-04-01 23:04:28,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:04:28,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 23:04:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 23:04:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:04:28,516 INFO L87 Difference]: Start difference. First operand 15042 states and 18407 transitions. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 7 states have internal predecessors, (502), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:04:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:31,282 INFO L93 Difference]: Finished difference Result 33535 states and 41270 transitions. [2023-04-01 23:04:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:04:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 7 states have internal predecessors, (502), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 530 [2023-04-01 23:04:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:31,329 INFO L225 Difference]: With dead ends: 33535 [2023-04-01 23:04:31,329 INFO L226 Difference]: Without dead ends: 18499 [2023-04-01 23:04:31,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1071 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:04:31,356 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2568 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2568 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:31,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2568 Valid, 164 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:04:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18499 states. [2023-04-01 23:04:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18499 to 17520. [2023-04-01 23:04:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17520 states, 16930 states have (on average 1.1360307147076196) internal successors, (19233), 17269 states have internal predecessors, (19233), 110 states have call successors, (110), 110 states have call predecessors, (110), 479 states have return successors, (1770), 140 states have call predecessors, (1770), 109 states have call successors, (1770) [2023-04-01 23:04:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17520 states to 17520 states and 21113 transitions. [2023-04-01 23:04:31,680 INFO L78 Accepts]: Start accepts. Automaton has 17520 states and 21113 transitions. Word has length 530 [2023-04-01 23:04:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:31,681 INFO L495 AbstractCegarLoop]: Abstraction has 17520 states and 21113 transitions. [2023-04-01 23:04:31,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 7 states have internal predecessors, (502), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:04:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17520 states and 21113 transitions. [2023-04-01 23:04:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-04-01 23:04:31,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:31,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:04:31,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:31,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:31,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:31,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash -104978647, now seen corresponding path program 1 times [2023-04-01 23:04:31,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:31,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102061009] [2023-04-01 23:04:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:04:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 183 proven. 3 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-04-01 23:04:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102061009] [2023-04-01 23:04:32,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102061009] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656834518] [2023-04-01 23:04:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:32,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:32,442 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:32,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:04:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:32,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:32,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-04-01 23:04:32,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:04:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656834518] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:32,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:04:32,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:04:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065432490] [2023-04-01 23:04:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:04:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:04:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:04:32,714 INFO L87 Difference]: Start difference. First operand 17520 states and 21113 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:34,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:34,114 INFO L93 Difference]: Finished difference Result 38440 states and 46916 transitions. [2023-04-01 23:04:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:04:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 532 [2023-04-01 23:04:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:34,157 INFO L225 Difference]: With dead ends: 38440 [2023-04-01 23:04:34,157 INFO L226 Difference]: Without dead ends: 20926 [2023-04-01 23:04:34,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:04:34,177 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 334 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:34,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 178 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 23:04:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20926 states. [2023-04-01 23:04:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20926 to 20005. [2023-04-01 23:04:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20005 states, 19370 states have (on average 1.1384099122354157) internal successors, (22051), 19722 states have internal predecessors, (22051), 126 states have call successors, (126), 126 states have call predecessors, (126), 508 states have return successors, (2113), 156 states have call predecessors, (2113), 125 states have call successors, (2113) [2023-04-01 23:04:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20005 states to 20005 states and 24290 transitions. [2023-04-01 23:04:34,538 INFO L78 Accepts]: Start accepts. Automaton has 20005 states and 24290 transitions. Word has length 532 [2023-04-01 23:04:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:34,539 INFO L495 AbstractCegarLoop]: Abstraction has 20005 states and 24290 transitions. [2023-04-01 23:04:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 20005 states and 24290 transitions. [2023-04-01 23:04:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-04-01 23:04:34,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:34,551 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:04:34,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:34,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:34,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:34,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:34,760 INFO L85 PathProgramCache]: Analyzing trace with hash 998803321, now seen corresponding path program 1 times [2023-04-01 23:04:34,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:34,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825753850] [2023-04-01 23:04:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:34,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 319 [2023-04-01 23:04:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2023-04-01 23:04:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 490 proven. 2 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-04-01 23:04:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:35,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825753850] [2023-04-01 23:04:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825753850] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62444967] [2023-04-01 23:04:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:35,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:35,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:04:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:35,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:35,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-04-01 23:04:35,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 493 proven. 2 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-04-01 23:04:35,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62444967] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:04:35,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:04:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:04:35,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876118181] [2023-04-01 23:04:35,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:04:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:04:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:04:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:04:35,992 INFO L87 Difference]: Start difference. First operand 20005 states and 24290 transitions. Second operand has 11 states, 11 states have (on average 46.45454545454545) internal successors, (511), 9 states have internal predecessors, (511), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:04:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:40,692 INFO L93 Difference]: Finished difference Result 42006 states and 53658 transitions. [2023-04-01 23:04:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 23:04:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 46.45454545454545) internal successors, (511), 9 states have internal predecessors, (511), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 552 [2023-04-01 23:04:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:40,785 INFO L225 Difference]: With dead ends: 42006 [2023-04-01 23:04:40,785 INFO L226 Difference]: Without dead ends: 22007 [2023-04-01 23:04:40,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 1117 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:04:40,822 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1488 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:40,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 352 Invalid, 6556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 6154 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 23:04:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2023-04-01 23:04:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 21866. [2023-04-01 23:04:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21866 states, 21117 states have (on average 1.1131789553440357) internal successors, (23507), 21500 states have internal predecessors, (23507), 199 states have call successors, (199), 136 states have call predecessors, (199), 549 states have return successors, (3508), 229 states have call predecessors, (3508), 198 states have call successors, (3508) [2023-04-01 23:04:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21866 states to 21866 states and 27214 transitions. [2023-04-01 23:04:41,391 INFO L78 Accepts]: Start accepts. Automaton has 21866 states and 27214 transitions. Word has length 552 [2023-04-01 23:04:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:41,394 INFO L495 AbstractCegarLoop]: Abstraction has 21866 states and 27214 transitions. [2023-04-01 23:04:41,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.45454545454545) internal successors, (511), 9 states have internal predecessors, (511), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:04:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21866 states and 27214 transitions. [2023-04-01 23:04:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-04-01 23:04:41,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:41,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:41,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:41,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:41,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:41,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2146940565, now seen corresponding path program 1 times [2023-04-01 23:04:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:41,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749471005] [2023-04-01 23:04:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:42,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:43,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 23:04:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2023-04-01 23:04:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 282 proven. 65 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-04-01 23:04:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749471005] [2023-04-01 23:04:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749471005] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910338026] [2023-04-01 23:04:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:43,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:43,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:04:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:43,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:04:43,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-04-01 23:04:44,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:04:44,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910338026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:44,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:04:44,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:04:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375246156] [2023-04-01 23:04:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:04:44,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:04:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:04:44,330 INFO L87 Difference]: Start difference. First operand 21866 states and 27214 transitions. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:04:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:46,431 INFO L93 Difference]: Finished difference Result 44796 states and 54088 transitions. [2023-04-01 23:04:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:04:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 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 552 [2023-04-01 23:04:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:46,483 INFO L225 Difference]: With dead ends: 44796 [2023-04-01 23:04:46,484 INFO L226 Difference]: Without dead ends: 22940 [2023-04-01 23:04:46,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:04:46,520 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 634 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:46,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 171 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:04:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22940 states. [2023-04-01 23:04:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22940 to 21986. [2023-04-01 23:04:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21986 states, 21264 states have (on average 1.1123965387509405) internal successors, (23654), 21678 states have internal predecessors, (23654), 138 states have call successors, (138), 138 states have call predecessors, (138), 583 states have return successors, (1998), 169 states have call predecessors, (1998), 137 states have call successors, (1998) [2023-04-01 23:04:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21986 states to 21986 states and 25790 transitions. [2023-04-01 23:04:46,923 INFO L78 Accepts]: Start accepts. Automaton has 21986 states and 25790 transitions. Word has length 552 [2023-04-01 23:04:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:46,924 INFO L495 AbstractCegarLoop]: Abstraction has 21986 states and 25790 transitions. [2023-04-01 23:04:46,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:04:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21986 states and 25790 transitions. [2023-04-01 23:04:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2023-04-01 23:04:46,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:46,941 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:04:46,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 23:04:47,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:47,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1773486327, now seen corresponding path program 1 times [2023-04-01 23:04:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867993036] [2023-04-01 23:04:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:47,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:47,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:04:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:47,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:04:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 183 proven. 3 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-04-01 23:04:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867993036] [2023-04-01 23:04:47,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867993036] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:47,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464649515] [2023-04-01 23:04:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:47,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:47,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:47,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:04:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:48,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:48,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-04-01 23:04:48,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:04:48,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464649515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:04:48,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:04:48,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:04:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605925682] [2023-04-01 23:04:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:04:48,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:04:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:04:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:04:48,153 INFO L87 Difference]: Start difference. First operand 21986 states and 25790 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:04:49,876 INFO L93 Difference]: Finished difference Result 53143 states and 62823 transitions. [2023-04-01 23:04:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:04:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 680 [2023-04-01 23:04:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:04:49,916 INFO L225 Difference]: With dead ends: 53143 [2023-04-01 23:04:49,916 INFO L226 Difference]: Without dead ends: 23863 [2023-04-01 23:04:49,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:04:49,946 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 270 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:04:49,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 656 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 23:04:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23863 states. [2023-04-01 23:04:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23863 to 22631. [2023-04-01 23:04:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22631 states, 22021 states have (on average 1.0602606602788247) internal successors, (23348), 22328 states have internal predecessors, (23348), 144 states have call successors, (144), 144 states have call predecessors, (144), 465 states have return successors, (1462), 158 states have call predecessors, (1462), 143 states have call successors, (1462) [2023-04-01 23:04:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22631 states to 22631 states and 24954 transitions. [2023-04-01 23:04:50,395 INFO L78 Accepts]: Start accepts. Automaton has 22631 states and 24954 transitions. Word has length 680 [2023-04-01 23:04:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:04:50,395 INFO L495 AbstractCegarLoop]: Abstraction has 22631 states and 24954 transitions. [2023-04-01 23:04:50,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:04:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 22631 states and 24954 transitions. [2023-04-01 23:04:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2023-04-01 23:04:50,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:04:50,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:04:50,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:04:50,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:04:50,617 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:04:50,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:04:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1288089314, now seen corresponding path program 1 times [2023-04-01 23:04:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:04:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421627183] [2023-04-01 23:04:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:04:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:04:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:04:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:04:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:04:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 540 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 23:04:51,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:04:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421627183] [2023-04-01 23:04:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421627183] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:04:51,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438419064] [2023-04-01 23:04:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:04:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:04:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:04:51,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:04:51,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:04:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:04:51,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:04:51,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:04:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:04:56,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:04:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 23:04:57,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438419064] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:04:57,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:04:57,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-04-01 23:04:57,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410159730] [2023-04-01 23:04:57,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:04:57,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:04:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:04:57,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:04:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:04:57,385 INFO L87 Difference]: Start difference. First operand 22631 states and 24954 transitions. Second operand has 11 states, 11 states have (on average 98.54545454545455) internal successors, (1084), 9 states have internal predecessors, (1084), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:05:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:00,911 INFO L93 Difference]: Finished difference Result 47607 states and 52656 transitions. [2023-04-01 23:05:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 23:05:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 98.54545454545455) internal successors, (1084), 9 states have internal predecessors, (1084), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 704 [2023-04-01 23:05:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:00,951 INFO L225 Difference]: With dead ends: 47607 [2023-04-01 23:05:00,951 INFO L226 Difference]: Without dead ends: 21818 [2023-04-01 23:05:01,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 1419 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:05:01,051 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1802 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 4367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:01,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 170 Invalid, 4367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 23:05:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21818 states. [2023-04-01 23:05:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21818 to 18018. [2023-04-01 23:05:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18018 states, 17580 states have (on average 1.0372582480091013) internal successors, (18235), 17784 states have internal predecessors, (18235), 116 states have call successors, (116), 116 states have call predecessors, (116), 321 states have return successors, (751), 117 states have call predecessors, (751), 115 states have call successors, (751) [2023-04-01 23:05:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18018 states to 18018 states and 19102 transitions. [2023-04-01 23:05:01,355 INFO L78 Accepts]: Start accepts. Automaton has 18018 states and 19102 transitions. Word has length 704 [2023-04-01 23:05:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:01,355 INFO L495 AbstractCegarLoop]: Abstraction has 18018 states and 19102 transitions. [2023-04-01 23:05:01,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 98.54545454545455) internal successors, (1084), 9 states have internal predecessors, (1084), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:05:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18018 states and 19102 transitions. [2023-04-01 23:05:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2023-04-01 23:05:01,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:01,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:05:01,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:05:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:05:01,574 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:01,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1381498258, now seen corresponding path program 1 times [2023-04-01 23:05:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:01,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330190018] [2023-04-01 23:05:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:01,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:01,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 23:05:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2023-04-01 23:05:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330190018] [2023-04-01 23:05:02,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330190018] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:02,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:05:02,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 23:05:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760771789] [2023-04-01 23:05:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:02,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:05:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:05:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:02,039 INFO L87 Difference]: Start difference. First operand 18018 states and 19102 transitions. Second operand has 5 states, 5 states have (on average 68.2) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:03,420 INFO L93 Difference]: Finished difference Result 36330 states and 38540 transitions. [2023-04-01 23:05:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:05:03,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (4), 4 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 709 [2023-04-01 23:05:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:03,452 INFO L225 Difference]: With dead ends: 36330 [2023-04-01 23:05:03,452 INFO L226 Difference]: Without dead ends: 18318 [2023-04-01 23:05:03,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:05:03,472 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 969 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:03,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 72 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 23:05:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18318 states. [2023-04-01 23:05:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18318 to 18306. [2023-04-01 23:05:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18306 states, 17870 states have (on average 1.0314493564633465) internal successors, (18432), 18068 states have internal predecessors, (18432), 118 states have call successors, (118), 118 states have call predecessors, (118), 317 states have return successors, (651), 119 states have call predecessors, (651), 117 states have call successors, (651) [2023-04-01 23:05:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18306 states to 18306 states and 19201 transitions. [2023-04-01 23:05:03,776 INFO L78 Accepts]: Start accepts. Automaton has 18306 states and 19201 transitions. Word has length 709 [2023-04-01 23:05:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:03,776 INFO L495 AbstractCegarLoop]: Abstraction has 18306 states and 19201 transitions. [2023-04-01 23:05:03,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.2) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18306 states and 19201 transitions. [2023-04-01 23:05:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2023-04-01 23:05:03,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:03,785 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:05:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 23:05:03,785 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:03,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1074167923, now seen corresponding path program 1 times [2023-04-01 23:05:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:03,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109262460] [2023-04-01 23:05:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:03,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:05:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2023-04-01 23:05:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 245 proven. 4 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-04-01 23:05:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109262460] [2023-04-01 23:05:04,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109262460] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323230390] [2023-04-01 23:05:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:04,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:04,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:05:04,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:05:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:04,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:05:04,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-04-01 23:05:04,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323230390] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:04,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:04,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:05:04,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992612817] [2023-04-01 23:05:04,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:05:04,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:05:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:04,657 INFO L87 Difference]: Start difference. First operand 18306 states and 19201 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:05,507 INFO L93 Difference]: Finished difference Result 34094 states and 35772 transitions. [2023-04-01 23:05:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:05:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 734 [2023-04-01 23:05:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:05,534 INFO L225 Difference]: With dead ends: 34094 [2023-04-01 23:05:05,534 INFO L226 Difference]: Without dead ends: 15794 [2023-04-01 23:05:05,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 743 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:05:05,551 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 299 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:05,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 414 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 23:05:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15794 states. [2023-04-01 23:05:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15794 to 15487. [2023-04-01 23:05:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15110 states have (on average 1.0309728656518862) internal successors, (15578), 15285 states have internal predecessors, (15578), 100 states have call successors, (100), 100 states have call predecessors, (100), 276 states have return successors, (550), 101 states have call predecessors, (550), 99 states have call successors, (550) [2023-04-01 23:05:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 16228 transitions. [2023-04-01 23:05:05,737 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 16228 transitions. Word has length 734 [2023-04-01 23:05:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:05,737 INFO L495 AbstractCegarLoop]: Abstraction has 15487 states and 16228 transitions. [2023-04-01 23:05:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:05,738 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 16228 transitions. [2023-04-01 23:05:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2023-04-01 23:05:05,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:05,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:05:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:05:05,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:05:05,960 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:05,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash 195193552, now seen corresponding path program 1 times [2023-04-01 23:05:05,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537340062] [2023-04-01 23:05:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:07,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:07,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 561 [2023-04-01 23:05:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 671 [2023-04-01 23:05:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 493 proven. 546 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-04-01 23:05:08,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537340062] [2023-04-01 23:05:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537340062] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705872101] [2023-04-01 23:05:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:08,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:08,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:05:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:05:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:08,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:05:08,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2023-04-01 23:05:08,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:05:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705872101] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:05:08,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:05:08,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2023-04-01 23:05:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447528612] [2023-04-01 23:05:08,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:05:08,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:05:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:05:08,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:05:08,586 INFO L87 Difference]: Start difference. First operand 15487 states and 16228 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:09,507 INFO L93 Difference]: Finished difference Result 34401 states and 36076 transitions. [2023-04-01 23:05:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:05:09,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 889 [2023-04-01 23:05:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:09,535 INFO L225 Difference]: With dead ends: 34401 [2023-04-01 23:05:09,535 INFO L226 Difference]: Without dead ends: 18920 [2023-04-01 23:05:09,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:05:09,554 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 266 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 459 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 23:05:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18920 states. [2023-04-01 23:05:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18920 to 18300. [2023-04-01 23:05:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18300 states, 17868 states have (on average 1.030613387060667) internal successors, (18415), 18062 states have internal predecessors, (18415), 118 states have call successors, (118), 118 states have call predecessors, (118), 313 states have return successors, (646), 119 states have call predecessors, (646), 117 states have call successors, (646) [2023-04-01 23:05:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18300 states to 18300 states and 19179 transitions. [2023-04-01 23:05:09,791 INFO L78 Accepts]: Start accepts. Automaton has 18300 states and 19179 transitions. Word has length 889 [2023-04-01 23:05:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:09,792 INFO L495 AbstractCegarLoop]: Abstraction has 18300 states and 19179 transitions. [2023-04-01 23:05:09,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:05:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 18300 states and 19179 transitions. [2023-04-01 23:05:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2023-04-01 23:05:09,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:05:09,810 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:05:09,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 23:05:10,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 23:05:10,017 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:05:10,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:05:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash -749919136, now seen corresponding path program 1 times [2023-04-01 23:05:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:05:10,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597167240] [2023-04-01 23:05:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:05:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:05:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:05:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:05:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:05:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2023-04-01 23:05:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 675 [2023-04-01 23:05:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 835 proven. 289 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-04-01 23:05:11,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:05:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597167240] [2023-04-01 23:05:11,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597167240] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:05:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339406231] [2023-04-01 23:05:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:05:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:05:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:05:11,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:05:11,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:05:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:05:12,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 23:05:12,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:05:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 902 proven. 347 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-04-01 23:05:13,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:05:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 889 proven. 2 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2023-04-01 23:05:14,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339406231] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:05:14,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:05:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 6] total 23 [2023-04-01 23:05:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671079902] [2023-04-01 23:05:14,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:05:14,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 23:05:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:05:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 23:05:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-04-01 23:05:14,020 INFO L87 Difference]: Start difference. First operand 18300 states and 19179 transitions. Second operand has 23 states, 23 states have (on average 52.30434782608695) internal successors, (1203), 21 states have internal predecessors, (1203), 10 states have call successors, (15), 9 states have call predecessors, (15), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 23:05:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:05:25,832 INFO L93 Difference]: Finished difference Result 43563 states and 45696 transitions. [2023-04-01 23:05:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-04-01 23:05:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 52.30434782608695) internal successors, (1203), 21 states have internal predecessors, (1203), 10 states have call successors, (15), 9 states have call predecessors, (15), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 926 [2023-04-01 23:05:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:05:25,833 INFO L225 Difference]: With dead ends: 43563 [2023-04-01 23:05:25,833 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 23:05:25,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2024 GetRequests, 1922 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3360 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1901, Invalid=8401, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 23:05:25,856 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 8899 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 14431 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8899 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 15359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 14431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-04-01 23:05:25,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8899 Valid, 584 Invalid, 15359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 14431 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-04-01 23:05:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 23:05:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 23:05:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 23:05:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 23:05:25,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 926 [2023-04-01 23:05:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:05:25,858 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 23:05:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.30434782608695) internal successors, (1203), 21 states have internal predecessors, (1203), 10 states have call successors, (15), 9 states have call predecessors, (15), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 23:05:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 23:05:25,858 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 23:05:25,860 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 23:05:25,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:05:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 23:05:26,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.