/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:50:38,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:50:38,795 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:50:38,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:50:38,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:50:38,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:50:38,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:50:38,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:50:38,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:50:38,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:50:38,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:50:38,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:50:38,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:50:38,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:50:38,828 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:50:38,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:50:38,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:50:38,828 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:50:38,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:50:38,830 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:50:38,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:50:38,831 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:50:38,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:50:38,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:50:38,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:50:38,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:38,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:50:38,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:50:38,833 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:50:38,833 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:50:39,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:50:39,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:50:39,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:50:39,045 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:50:39,046 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:50:39,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c [2023-08-04 09:50:40,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:50:40,244 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:50:40,244 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c [2023-08-04 09:50:40,250 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0dd408a/1621a8d9031f4c1faa9affc4cacf8ba4/FLAG1cb02862b [2023-08-04 09:50:40,260 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb0dd408a/1621a8d9031f4c1faa9affc4cacf8ba4 [2023-08-04 09:50:40,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:50:40,263 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:50:40,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:40,264 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:50:40,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:50:40,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3aa5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40, skipping insertion in model container [2023-08-04 09:50:40,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,282 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:50:40,409 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c[2038,2051] [2023-08-04 09:50:40,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:40,417 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:50:40,440 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy1.wvr_bound2.c[2038,2051] [2023-08-04 09:50:40,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:50:40,450 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:50:40,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40 WrapperNode [2023-08-04 09:50:40,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:50:40,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:40,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:50:40,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:50:40,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,484 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 90 [2023-08-04 09:50:40,484 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:50:40,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:50:40,497 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:50:40,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:50:40,504 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,519 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:50:40,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:50:40,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:50:40,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:50:40,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (1/1) ... [2023-08-04 09:50:40,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:50:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:40,569 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) [2023-08-04 09:50:40,581 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 [2023-08-04 09:50:40,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:50:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:50:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:50:40,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:50:40,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:50:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:50:40,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:50:40,618 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:50:40,685 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:50:40,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:50:40,827 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:50:40,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:50:40,832 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 09:50:40,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:40 BoogieIcfgContainer [2023-08-04 09:50:40,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:50:40,844 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:50:40,844 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:50:40,847 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:50:40,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:50:40" (1/3) ... [2023-08-04 09:50:40,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424c4580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:40, skipping insertion in model container [2023-08-04 09:50:40,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:50:40" (2/3) ... [2023-08-04 09:50:40,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424c4580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:50:40, skipping insertion in model container [2023-08-04 09:50:40,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:50:40" (3/3) ... [2023-08-04 09:50:40,849 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy1.wvr_bound2.c [2023-08-04 09:50:40,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:50:40,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:50:40,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:50:40,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:50:40,927 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:50:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,035 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-04 09:50:41,036 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:50:41,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-04 09:50:41,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,050 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:41,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:41,137 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-04 09:50:41,137 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:50:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-04 09:50:41,140 INFO L119 LiptonReduction]: Number of co-enabled transitions 1888 [2023-08-04 09:50:42,734 INFO L134 LiptonReduction]: Checked pairs total: 2352 [2023-08-04 09:50:42,735 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 09:50:42,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:50:42,776 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;@3cbfde1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:42,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:50:42,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:42,784 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 09:50:42,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:42,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:42,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:50:42,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:42,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 397513386, now seen corresponding path program 1 times [2023-08-04 09:50:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711065567] [2023-08-04 09:50:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:42,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:50:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:42,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711065567] [2023-08-04 09:50:42,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711065567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:42,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:42,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:50:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73266404] [2023-08-04 09:50:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:42,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:42,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:42,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-04 09:50:42,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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) [2023-08-04 09:50:42,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:42,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-04 09:50:42,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:43,054 INFO L124 PetriNetUnfolderBase]: 108/203 cut-off events. [2023-08-04 09:50:43,055 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 09:50:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 203 events. 108/203 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 21 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 308. Up to 183 conditions per place. [2023-08-04 09:50:43,057 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 23 selfloop transitions, 2 changer transitions 3/30 dead transitions. [2023-08-04 09:50:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 134 flow [2023-08-04 09:50:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-04 09:50:43,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49174917491749176 [2023-08-04 09:50:43,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-04 09:50:43,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-04 09:50:43,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:43,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-04 09:50:43,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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) [2023-08-04 09:50:43,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,077 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 78 flow. Second operand 3 states and 298 transitions. [2023-08-04 09:50:43,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 134 flow [2023-08-04 09:50:43,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:50:43,080 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 76 flow [2023-08-04 09:50:43,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 09:50:43,084 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 09:50:43,084 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 76 flow [2023-08-04 09:50:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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) [2023-08-04 09:50:43,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:43,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:43,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:50:43,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:43,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 229635296, now seen corresponding path program 1 times [2023-08-04 09:50:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:43,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744631513] [2023-08-04 09:50:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:43,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:50:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744631513] [2023-08-04 09:50:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744631513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145971220] [2023-08-04 09:50:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:43,159 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) [2023-08-04 09:50:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:50:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:43,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:50:43,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:43,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145971220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:43,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:43,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926712903] [2023-08-04 09:50:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:43,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:43,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-04 09:50:43,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2023-08-04 09:50:43,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:43,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-04 09:50:43,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:43,267 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-08-04 09:50:43,267 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 09:50:43,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 195 events. 106/195 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 450 event pairs, 24 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 302. Up to 168 conditions per place. [2023-08-04 09:50:43,268 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 25 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 09:50:43,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 142 flow [2023-08-04 09:50:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 09:50:43,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933993399339934 [2023-08-04 09:50:43,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 09:50:43,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 09:50:43,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:43,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 09:50:43,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2023-08-04 09:50:43,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,274 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 76 flow. Second operand 3 states and 299 transitions. [2023-08-04 09:50:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 142 flow [2023-08-04 09:50:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:50:43,275 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 74 flow [2023-08-04 09:50:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-04 09:50:43,276 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2023-08-04 09:50:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 74 flow [2023-08-04 09:50:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2023-08-04 09:50:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:43,502 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:43,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -297755623, now seen corresponding path program 1 times [2023-08-04 09:50:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:43,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900950863] [2023-08-04 09:50:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:50:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900950863] [2023-08-04 09:50:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900950863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550369188] [2023-08-04 09:50:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:43,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:43,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:43,621 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) [2023-08-04 09:50:43,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:50:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:43,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:43,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:50:43,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550369188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:43,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:43,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020896066] [2023-08-04 09:50:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:43,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:43,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-04 09:50:43,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-08-04 09:50:43,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:43,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-04 09:50:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:43,785 INFO L124 PetriNetUnfolderBase]: 74/143 cut-off events. [2023-08-04 09:50:43,785 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 09:50:43,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 143 events. 74/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 279 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 139. Up to 106 conditions per place. [2023-08-04 09:50:43,786 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-04 09:50:43,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 156 flow [2023-08-04 09:50:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-04 09:50:43,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49834983498349833 [2023-08-04 09:50:43,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-04 09:50:43,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-04 09:50:43,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:43,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-04 09:50:43,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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) [2023-08-04 09:50:43,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:43,795 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 74 flow. Second operand 3 states and 302 transitions. [2023-08-04 09:50:43,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 156 flow [2023-08-04 09:50:43,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:43,797 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 82 flow [2023-08-04 09:50:43,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-04 09:50:43,798 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-04 09:50:43,799 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 82 flow [2023-08-04 09:50:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2023-08-04 09:50:43,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:43,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:43,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:44,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:50:44,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:44,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -781312685, now seen corresponding path program 1 times [2023-08-04 09:50:44,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:44,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796857288] [2023-08-04 09:50:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:50:44,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:44,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796857288] [2023-08-04 09:50:44,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796857288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:44,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676578371] [2023-08-04 09:50:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:44,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:44,069 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) [2023-08-04 09:50:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:50:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:44,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:44,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:44,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676578371] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:44,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:44,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:50:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168253764] [2023-08-04 09:50:44,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:44,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 202 [2023-08-04 09:50:44,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-08-04 09:50:44,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:44,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 202 [2023-08-04 09:50:44,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:44,191 INFO L124 PetriNetUnfolderBase]: 69/136 cut-off events. [2023-08-04 09:50:44,191 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:50:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 136 events. 69/136 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 251 event pairs, 29 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 142. Up to 111 conditions per place. [2023-08-04 09:50:44,192 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 25 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-04 09:50:44,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 150 flow [2023-08-04 09:50:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 09:50:44,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933993399339934 [2023-08-04 09:50:44,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 09:50:44,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 09:50:44,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:44,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 09:50:44,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2023-08-04 09:50:44,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:44,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2023-08-04 09:50:44,202 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 82 flow. Second operand 3 states and 299 transitions. [2023-08-04 09:50:44,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 150 flow [2023-08-04 09:50:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:44,205 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 84 flow [2023-08-04 09:50:44,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-04 09:50:44,206 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 09:50:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 84 flow [2023-08-04 09:50:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-08-04 09:50:44,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:44,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:44,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:50:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:44,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:44,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1187976885, now seen corresponding path program 1 times [2023-08-04 09:50:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:44,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146508157] [2023-08-04 09:50:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:44,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146508157] [2023-08-04 09:50:44,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146508157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:44,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930162766] [2023-08-04 09:50:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:44,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:44,501 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) [2023-08-04 09:50:44,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:50:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:44,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:44,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:44,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930162766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:44,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:44,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:50:44,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783897756] [2023-08-04 09:50:44,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:44,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:44,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 202 [2023-08-04 09:50:44,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 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) [2023-08-04 09:50:44,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:44,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 202 [2023-08-04 09:50:44,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:44,624 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 09:50:44,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 09:50:44,625 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 09:50:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 9 transitions, 40 flow [2023-08-04 09:50:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 09:50:44,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452970297029703 [2023-08-04 09:50:44,628 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 09:50:44,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 09:50:44,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:44,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 09:50:44,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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) [2023-08-04 09:50:44,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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) [2023-08-04 09:50:44,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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) [2023-08-04 09:50:44,630 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 84 flow. Second operand 4 states and 366 transitions. [2023-08-04 09:50:44,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 9 transitions, 40 flow [2023-08-04 09:50:44,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:44,631 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 09:50:44,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 09:50:44,633 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -12 predicate places. [2023-08-04 09:50:44,633 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 09:50:44,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 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) [2023-08-04 09:50:44,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:50:44,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:50:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:44,840 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:50:44,842 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:50:44,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,863 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-04 09:50:44,863 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:50:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-04 09:50:44,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,865 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,865 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:44,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 240 flow [2023-08-04 09:50:44,879 INFO L124 PetriNetUnfolderBase]: 33/247 cut-off events. [2023-08-04 09:50:44,879 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:50:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 33/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 780 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-04 09:50:44,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 1888 [2023-08-04 09:50:46,363 INFO L134 LiptonReduction]: Checked pairs total: 2371 [2023-08-04 09:50:46,363 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 09:50:46,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:50:46,365 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;@3cbfde1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:46,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:50:46,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:46,367 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-08-04 09:50:46,367 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:46,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:46,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:50:46,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:50:46,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2095181071, now seen corresponding path program 1 times [2023-08-04 09:50:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:46,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104645115] [2023-08-04 09:50:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:46,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:46,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:50:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:50:46,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:50:46,429 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:50:46,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:50:46,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:50:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:50:46,430 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:50:46,430 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:50:46,430 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:50:46,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:50:46,442 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:50:46,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,489 INFO L124 PetriNetUnfolderBase]: 134/812 cut-off events. [2023-08-04 09:50:46,490 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:50:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 134/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4015 event pairs, 1 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-04 09:50:46,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:50:46,496 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,496 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 131 transitions, 310 flow [2023-08-04 09:50:46,541 INFO L124 PetriNetUnfolderBase]: 134/812 cut-off events. [2023-08-04 09:50:46,541 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:50:46,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 812 events. 134/812 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4015 event pairs, 1 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 479. Up to 32 conditions per place. [2023-08-04 09:50:46,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 4608 [2023-08-04 09:50:48,140 INFO L134 LiptonReduction]: Checked pairs total: 13758 [2023-08-04 09:50:48,140 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 09:50:48,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:50:48,142 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;@3cbfde1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:50:48,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:50:48,143 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:50:48,144 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 09:50:48,144 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:50:48,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:48,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:50:48,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:48,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash 722905414, now seen corresponding path program 1 times [2023-08-04 09:50:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:48,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840189046] [2023-08-04 09:50:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:48,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:50:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840189046] [2023-08-04 09:50:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840189046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:50:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244703695] [2023-08-04 09:50:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:48,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-04 09:50:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2023-08-04 09:50:48,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:48,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-04 09:50:48,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:48,307 INFO L124 PetriNetUnfolderBase]: 1950/2814 cut-off events. [2023-08-04 09:50:48,308 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-04 09:50:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 2814 events. 1950/2814 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10833 event pairs, 641 based on Foata normal form. 0/2582 useless extension candidates. Maximal degree in co-relation 2142. Up to 2621 conditions per place. [2023-08-04 09:50:48,322 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 35 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 09:50:48,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 224 flow [2023-08-04 09:50:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-04 09:50:48,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-08-04 09:50:48,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-04 09:50:48,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-04 09:50:48,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:48,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-04 09:50:48,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2023-08-04 09:50:48,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:48,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:48,340 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 144 flow. Second operand 3 states and 351 transitions. [2023-08-04 09:50:48,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 224 flow [2023-08-04 09:50:48,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:50:48,342 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 142 flow [2023-08-04 09:50:48,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-04 09:50:48,342 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 09:50:48,342 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 142 flow [2023-08-04 09:50:48,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2023-08-04 09:50:48,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:48,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:48,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:50:48,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:48,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1986442055, now seen corresponding path program 1 times [2023-08-04 09:50:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:48,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000302114] [2023-08-04 09:50:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:50:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:48,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000302114] [2023-08-04 09:50:48,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000302114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:48,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905149348] [2023-08-04 09:50:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:48,406 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) [2023-08-04 09:50:48,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:50:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:48,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:48,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:50:48,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905149348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:48,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:48,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679150961] [2023-08-04 09:50:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:48,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:48,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-04 09:50:48,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2023-08-04 09:50:48,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:48,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-04 09:50:48,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:48,656 INFO L124 PetriNetUnfolderBase]: 1944/2812 cut-off events. [2023-08-04 09:50:48,656 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-04 09:50:48,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5726 conditions, 2812 events. 1944/2812 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10828 event pairs, 644 based on Foata normal form. 0/2599 useless extension candidates. Maximal degree in co-relation 5696. Up to 2550 conditions per place. [2023-08-04 09:50:48,670 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 40 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 09:50:48,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2023-08-04 09:50:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:48,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-04 09:50:48,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2023-08-04 09:50:48,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-04 09:50:48,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-04 09:50:48,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:48,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-04 09:50:48,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-08-04 09:50:48,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:48,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:48,678 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 142 flow. Second operand 3 states and 354 transitions. [2023-08-04 09:50:48,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2023-08-04 09:50:48,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:50:48,682 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 146 flow [2023-08-04 09:50:48,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-04 09:50:48,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-04 09:50:48,683 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 146 flow [2023-08-04 09:50:48,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2023-08-04 09:50:48,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:48,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:48,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:50:48,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:48,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:48,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -756913646, now seen corresponding path program 1 times [2023-08-04 09:50:48,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:48,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122681925] [2023-08-04 09:50:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:48,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:50:48,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122681925] [2023-08-04 09:50:48,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122681925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890944720] [2023-08-04 09:50:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:48,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:48,949 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) [2023-08-04 09:50:49,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:50:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:49,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:49,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:50:49,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:49,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890944720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:49,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:49,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:50:49,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988670105] [2023-08-04 09:50:49,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:49,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:49,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-04 09:50:49,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2023-08-04 09:50:49,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:49,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-04 09:50:49,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:49,263 INFO L124 PetriNetUnfolderBase]: 1788/2632 cut-off events. [2023-08-04 09:50:49,264 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 09:50:49,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5445 conditions, 2632 events. 1788/2632 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10167 event pairs, 620 based on Foata normal form. 0/2481 useless extension candidates. Maximal degree in co-relation 2340. Up to 1936 conditions per place. [2023-08-04 09:50:49,278 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 47 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 09:50:49,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 282 flow [2023-08-04 09:50:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 09:50:49,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-04 09:50:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:49,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2023-08-04 09:50:49,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:49,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:49,282 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 146 flow. Second operand 3 states and 360 transitions. [2023-08-04 09:50:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 282 flow [2023-08-04 09:50:49,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:49,285 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 156 flow [2023-08-04 09:50:49,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 09:50:49,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 09:50:49,286 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 156 flow [2023-08-04 09:50:49,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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) [2023-08-04 09:50:49,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:49,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:49,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:49,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1230950743, now seen corresponding path program 1 times [2023-08-04 09:50:49,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496352395] [2023-08-04 09:50:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:50:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496352395] [2023-08-04 09:50:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496352395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575943272] [2023-08-04 09:50:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:49,569 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) [2023-08-04 09:50:49,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:50:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:49,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:50:49,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:49,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:50:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575943272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:49,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:50:49,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:50:49,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968931524] [2023-08-04 09:50:49,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:49,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2023-08-04 09:50:49,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-08-04 09:50:49,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:49,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2023-08-04 09:50:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:49,814 INFO L124 PetriNetUnfolderBase]: 1807/2703 cut-off events. [2023-08-04 09:50:49,814 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 09:50:49,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5841 conditions, 2703 events. 1807/2703 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10464 event pairs, 675 based on Foata normal form. 0/2649 useless extension candidates. Maximal degree in co-relation 2657. Up to 1944 conditions per place. [2023-08-04 09:50:49,829 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 48 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:50:49,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 294 flow [2023-08-04 09:50:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-04 09:50:49,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-04 09:50:49,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:49,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-04 09:50:49,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2023-08-04 09:50:49,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:49,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:49,832 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 156 flow. Second operand 3 states and 360 transitions. [2023-08-04 09:50:49,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 294 flow [2023-08-04 09:50:49,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:49,835 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 166 flow [2023-08-04 09:50:49,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 09:50:49,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2023-08-04 09:50:49,836 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 166 flow [2023-08-04 09:50:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-08-04 09:50:49,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:49,836 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-04 09:50:49,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:50,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:50,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:50,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -799149045, now seen corresponding path program 1 times [2023-08-04 09:50:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671788748] [2023-08-04 09:50:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:50,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671788748] [2023-08-04 09:50:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671788748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686276425] [2023-08-04 09:50:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:50,098 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) [2023-08-04 09:50:50,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:50:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:50,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:50,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:50:50,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686276425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:50,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:50,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:50:50,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365510518] [2023-08-04 09:50:50,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:50,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-04 09:50:50,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 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) [2023-08-04 09:50:50,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:50,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-04 09:50:50,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:50,444 INFO L124 PetriNetUnfolderBase]: 1613/2403 cut-off events. [2023-08-04 09:50:50,444 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 09:50:50,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 2403 events. 1613/2403 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9060 event pairs, 387 based on Foata normal form. 2/2393 useless extension candidates. Maximal degree in co-relation 3158. Up to 2205 conditions per place. [2023-08-04 09:50:50,455 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 41 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 09:50:50,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 272 flow [2023-08-04 09:50:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-08-04 09:50:50,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49890350877192985 [2023-08-04 09:50:50,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-08-04 09:50:50,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-08-04 09:50:50,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:50,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-08-04 09:50:50,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 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) [2023-08-04 09:50:50,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:50,460 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:50,461 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 166 flow. Second operand 4 states and 455 transitions. [2023-08-04 09:50:50,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 272 flow [2023-08-04 09:50:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:50,466 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 178 flow [2023-08-04 09:50:50,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-04 09:50:50,467 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-04 09:50:50,467 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 178 flow [2023-08-04 09:50:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 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) [2023-08-04 09:50:50,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:50:50,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:50,672 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,SelfDestructingSolverStorable10 [2023-08-04 09:50:50,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:50,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1521205541, now seen corresponding path program 1 times [2023-08-04 09:50:50,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:50,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805801093] [2023-08-04 09:50:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:50:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805801093] [2023-08-04 09:50:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805801093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818910400] [2023-08-04 09:50:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:50,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:50,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:50,749 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) [2023-08-04 09:50:50,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:50:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:50,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:50,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:50:50,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:50:50,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818910400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:50,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:50:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494315302] [2023-08-04 09:50:50,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:50,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:50,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:50,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:50,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:50,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-04 09:50:50,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 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) [2023-08-04 09:50:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:50,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-04 09:50:50,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:51,027 INFO L124 PetriNetUnfolderBase]: 1521/2267 cut-off events. [2023-08-04 09:50:51,027 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 09:50:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 2267 events. 1521/2267 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8194 event pairs, 364 based on Foata normal form. 8/2272 useless extension candidates. Maximal degree in co-relation 2925. Up to 1848 conditions per place. [2023-08-04 09:50:51,039 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 49 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 09:50:51,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 316 flow [2023-08-04 09:50:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-04 09:50:51,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076754385964912 [2023-08-04 09:50:51,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-04 09:50:51,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-04 09:50:51,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:51,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-04 09:50:51,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 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) [2023-08-04 09:50:51,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:51,044 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:51,044 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 178 flow. Second operand 4 states and 463 transitions. [2023-08-04 09:50:51,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 316 flow [2023-08-04 09:50:51,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 307 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:50:51,048 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 183 flow [2023-08-04 09:50:51,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-08-04 09:50:51,049 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2023-08-04 09:50:51,049 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 183 flow [2023-08-04 09:50:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 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) [2023-08-04 09:50:51,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:51,049 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:51,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:51,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:51,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:51,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1703846885, now seen corresponding path program 1 times [2023-08-04 09:50:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:51,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075908221] [2023-08-04 09:50:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:50:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:51,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075908221] [2023-08-04 09:50:51,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075908221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:51,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83076035] [2023-08-04 09:50:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:51,294 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) [2023-08-04 09:50:51,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:50:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:51,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:50:51,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:50:51,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83076035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:51,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:50:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586386841] [2023-08-04 09:50:51,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:51,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-04 09:50:51,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-04 09:50:51,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:51,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-04 09:50:51,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:51,517 INFO L124 PetriNetUnfolderBase]: 1017/1547 cut-off events. [2023-08-04 09:50:51,517 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 09:50:51,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1547 events. 1017/1547 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5052 event pairs, 215 based on Foata normal form. 32/1564 useless extension candidates. Maximal degree in co-relation 2757. Up to 663 conditions per place. [2023-08-04 09:50:51,524 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 55 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-04 09:50:51,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 354 flow [2023-08-04 09:50:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-04 09:50:51,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142543859649122 [2023-08-04 09:50:51,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-04 09:50:51,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-04 09:50:51,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:51,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-04 09:50:51,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2023-08-04 09:50:51,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:51,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:51,529 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 183 flow. Second operand 4 states and 469 transitions. [2023-08-04 09:50:51,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 354 flow [2023-08-04 09:50:51,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 344 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:50:51,533 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 194 flow [2023-08-04 09:50:51,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-04 09:50:51,533 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2023-08-04 09:50:51,533 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 194 flow [2023-08-04 09:50:51,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2023-08-04 09:50:51,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:51,534 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:51,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:51,738 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,SelfDestructingSolverStorable12 [2023-08-04 09:50:51,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:51,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash 261847008, now seen corresponding path program 1 times [2023-08-04 09:50:51,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:51,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301337978] [2023-08-04 09:50:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:50:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:51,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301337978] [2023-08-04 09:50:51,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301337978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:51,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233367737] [2023-08-04 09:50:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:51,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:51,819 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) [2023-08-04 09:50:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:50:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:51,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:50:51,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:50:51,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:50:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233367737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:50:51,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:50:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:50:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555170970] [2023-08-04 09:50:51,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:50:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:50:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:50:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:50:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-04 09:50:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 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) [2023-08-04 09:50:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-04 09:50:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:52,054 INFO L124 PetriNetUnfolderBase]: 1009/1532 cut-off events. [2023-08-04 09:50:52,054 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 09:50:52,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1532 events. 1009/1532 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4978 event pairs, 439 based on Foata normal form. 9/1526 useless extension candidates. Maximal degree in co-relation 2938. Up to 1160 conditions per place. [2023-08-04 09:50:52,063 INFO L140 encePairwiseOnDemand]: 224/228 looper letters, 55 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-08-04 09:50:52,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 366 flow [2023-08-04 09:50:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-08-04 09:50:52,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142543859649122 [2023-08-04 09:50:52,064 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-08-04 09:50:52,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-08-04 09:50:52,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:52,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-08-04 09:50:52,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2023-08-04 09:50:52,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:52,067 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:52,067 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 194 flow. Second operand 4 states and 469 transitions. [2023-08-04 09:50:52,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 366 flow [2023-08-04 09:50:52,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:52,071 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 198 flow [2023-08-04 09:50:52,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-04 09:50:52,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2023-08-04 09:50:52,071 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 198 flow [2023-08-04 09:50:52,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 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) [2023-08-04 09:50:52,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:52,072 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:52,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:52,277 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,SelfDestructingSolverStorable13 [2023-08-04 09:50:52,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:52,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash 446138342, now seen corresponding path program 1 times [2023-08-04 09:50:52,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86850680] [2023-08-04 09:50:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:52,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 09:50:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86850680] [2023-08-04 09:50:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86850680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:52,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 09:50:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610631280] [2023-08-04 09:50:52,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:52,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-04 09:50:52,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-04 09:50:52,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:52,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-04 09:50:52,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:52,644 INFO L124 PetriNetUnfolderBase]: 1795/2827 cut-off events. [2023-08-04 09:50:52,644 INFO L125 PetriNetUnfolderBase]: For 1426/1426 co-relation queries the response was YES. [2023-08-04 09:50:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6396 conditions, 2827 events. 1795/2827 cut-off events. For 1426/1426 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13405 event pairs, 445 based on Foata normal form. 1/2813 useless extension candidates. Maximal degree in co-relation 6166. Up to 1662 conditions per place. [2023-08-04 09:50:52,658 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 65 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2023-08-04 09:50:52,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 498 flow [2023-08-04 09:50:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-04 09:50:52,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321637426900585 [2023-08-04 09:50:52,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-04 09:50:52,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-04 09:50:52,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:52,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-04 09:50:52,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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) [2023-08-04 09:50:52,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:52,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:52,661 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 198 flow. Second operand 3 states and 364 transitions. [2023-08-04 09:50:52,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 498 flow [2023-08-04 09:50:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 482 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:50:52,666 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 223 flow [2023-08-04 09:50:52,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-04 09:50:52,666 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2023-08-04 09:50:52,666 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 223 flow [2023-08-04 09:50:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) [2023-08-04 09:50:52,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:52,667 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:52,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 09:50:52,667 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:52,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:52,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1958303809, now seen corresponding path program 1 times [2023-08-04 09:50:52,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:52,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679735153] [2023-08-04 09:50:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:52,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:50:52,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:52,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679735153] [2023-08-04 09:50:52,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679735153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:52,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:52,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:50:52,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571561941] [2023-08-04 09:50:52,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:52,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:52,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:52,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:52,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-04 09:50:52,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:52,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:52,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-04 09:50:52,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:53,022 INFO L124 PetriNetUnfolderBase]: 3937/5843 cut-off events. [2023-08-04 09:50:53,022 INFO L125 PetriNetUnfolderBase]: For 3691/3691 co-relation queries the response was YES. [2023-08-04 09:50:53,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15940 conditions, 5843 events. 3937/5843 cut-off events. For 3691/3691 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 29063 event pairs, 1134 based on Foata normal form. 0/5305 useless extension candidates. Maximal degree in co-relation 15609. Up to 2779 conditions per place. [2023-08-04 09:50:53,055 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 74 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-08-04 09:50:53,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 556 flow [2023-08-04 09:50:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 09:50:53,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365497076023392 [2023-08-04 09:50:53,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 09:50:53,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 09:50:53,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:53,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 09:50:53,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2023-08-04 09:50:53,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:53,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:53,058 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 223 flow. Second operand 3 states and 367 transitions. [2023-08-04 09:50:53,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 556 flow [2023-08-04 09:50:53,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:50:53,074 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 278 flow [2023-08-04 09:50:53,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-04 09:50:53,074 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2023-08-04 09:50:53,074 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 278 flow [2023-08-04 09:50:53,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:53,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:53,075 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:53,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:50:53,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:53,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -247590651, now seen corresponding path program 1 times [2023-08-04 09:50:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812338524] [2023-08-04 09:50:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:50:53,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812338524] [2023-08-04 09:50:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812338524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770810365] [2023-08-04 09:50:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:53,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:50:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:50:53,167 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) [2023-08-04 09:50:53,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:50:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:53,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 09:50:53,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:50:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:50:53,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:50:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:50:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770810365] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:50:53,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:50:53,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 5] total 9 [2023-08-04 09:50:53,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160805309] [2023-08-04 09:50:53,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:53,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:50:53,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:50:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-08-04 09:50:53,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-04 09:50:53,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 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) [2023-08-04 09:50:53,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:53,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-04 09:50:53,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:54,808 INFO L124 PetriNetUnfolderBase]: 11301/16830 cut-off events. [2023-08-04 09:50:54,809 INFO L125 PetriNetUnfolderBase]: For 22960/23008 co-relation queries the response was YES. [2023-08-04 09:50:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51576 conditions, 16830 events. 11301/16830 cut-off events. For 22960/23008 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 99103 event pairs, 2919 based on Foata normal form. 0/15552 useless extension candidates. Maximal degree in co-relation 50778. Up to 7713 conditions per place. [2023-08-04 09:50:54,939 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 108 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2023-08-04 09:50:54,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 135 transitions, 910 flow [2023-08-04 09:50:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-04 09:50:54,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153508771929824 [2023-08-04 09:50:54,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-04 09:50:54,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-04 09:50:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:54,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-04 09:50:54,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 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) [2023-08-04 09:50:54,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:54,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:54,945 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 278 flow. Second operand 4 states and 470 transitions. [2023-08-04 09:50:54,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 135 transitions, 910 flow [2023-08-04 09:50:55,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 882 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:55,126 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 430 flow [2023-08-04 09:50:55,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-04 09:50:55,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2023-08-04 09:50:55,127 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 430 flow [2023-08-04 09:50:55,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 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) [2023-08-04 09:50:55,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:55,127 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:55,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:50:55,332 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 [2023-08-04 09:50:55,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:55,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:55,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1071494320, now seen corresponding path program 1 times [2023-08-04 09:50:55,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:55,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895754063] [2023-08-04 09:50:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:55,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:50:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:55,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895754063] [2023-08-04 09:50:55,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895754063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:55,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:55,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:50:55,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103195171] [2023-08-04 09:50:55,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:55,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:55,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:55,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:55,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-04 09:50:55,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:55,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:55,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-04 09:50:55,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:56,678 INFO L124 PetriNetUnfolderBase]: 9539/14746 cut-off events. [2023-08-04 09:50:56,678 INFO L125 PetriNetUnfolderBase]: For 38919/41258 co-relation queries the response was YES. [2023-08-04 09:50:56,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54297 conditions, 14746 events. 9539/14746 cut-off events. For 38919/41258 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 93211 event pairs, 2164 based on Foata normal form. 888/15146 useless extension candidates. Maximal degree in co-relation 53467. Up to 6798 conditions per place. [2023-08-04 09:50:56,743 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 100 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-08-04 09:50:56,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 901 flow [2023-08-04 09:50:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-04 09:50:56,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292397660818714 [2023-08-04 09:50:56,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-04 09:50:56,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-04 09:50:56,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:56,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-04 09:50:56,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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) [2023-08-04 09:50:56,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:56,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:56,755 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 430 flow. Second operand 3 states and 362 transitions. [2023-08-04 09:50:56,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 901 flow [2023-08-04 09:50:56,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 901 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:50:56,808 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 514 flow [2023-08-04 09:50:56,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=514, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2023-08-04 09:50:56,809 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2023-08-04 09:50:56,809 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 514 flow [2023-08-04 09:50:56,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:56,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:56,809 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 09:50:56,809 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:56,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2146435591, now seen corresponding path program 1 times [2023-08-04 09:50:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519073878] [2023-08-04 09:50:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:50:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519073878] [2023-08-04 09:50:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519073878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:56,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:56,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:50:56,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352227029] [2023-08-04 09:50:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:50:56,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:50:56,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:50:56,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2023-08-04 09:50:56,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 514 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2023-08-04 09:50:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:58,156 INFO L124 PetriNetUnfolderBase]: 9913/15972 cut-off events. [2023-08-04 09:50:58,156 INFO L125 PetriNetUnfolderBase]: For 53109/54511 co-relation queries the response was YES. [2023-08-04 09:50:58,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63304 conditions, 15972 events. 9913/15972 cut-off events. For 53109/54511 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 107536 event pairs, 3119 based on Foata normal form. 492/16096 useless extension candidates. Maximal degree in co-relation 62406. Up to 10761 conditions per place. [2023-08-04 09:50:58,405 INFO L140 encePairwiseOnDemand]: 222/228 looper letters, 98 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2023-08-04 09:50:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 963 flow [2023-08-04 09:50:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:50:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:50:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 09:50:58,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365497076023392 [2023-08-04 09:50:58,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 09:50:58,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 09:50:58,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:58,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 09:50:58,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2023-08-04 09:50:58,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:58,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-04 09:50:58,409 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 514 flow. Second operand 3 states and 367 transitions. [2023-08-04 09:50:58,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 963 flow [2023-08-04 09:50:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 943 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:58,501 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 562 flow [2023-08-04 09:50:58,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=562, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2023-08-04 09:50:58,501 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2023-08-04 09:50:58,501 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 562 flow [2023-08-04 09:50:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2023-08-04 09:50:58,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:58,502 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:58,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 09:50:58,502 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:58,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2000513579, now seen corresponding path program 2 times [2023-08-04 09:50:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145707367] [2023-08-04 09:50:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:58,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:50:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:50:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:50:58,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145707367] [2023-08-04 09:50:58,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145707367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:50:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:50:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:50:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557363240] [2023-08-04 09:50:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:50:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:50:58,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:50:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:50:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:50:58,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-04 09:50:58,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 562 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 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) [2023-08-04 09:50:58,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:50:58,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-04 09:50:58,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:50:59,783 INFO L124 PetriNetUnfolderBase]: 10238/15352 cut-off events. [2023-08-04 09:50:59,783 INFO L125 PetriNetUnfolderBase]: For 59231/59315 co-relation queries the response was YES. [2023-08-04 09:50:59,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66484 conditions, 15352 events. 10238/15352 cut-off events. For 59231/59315 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 90526 event pairs, 2254 based on Foata normal form. 183/15502 useless extension candidates. Maximal degree in co-relation 65766. Up to 13089 conditions per place. [2023-08-04 09:50:59,903 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 104 selfloop transitions, 9 changer transitions 22/143 dead transitions. [2023-08-04 09:50:59,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 143 transitions, 1193 flow [2023-08-04 09:50:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:50:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:50:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-08-04 09:50:59,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032894736842105 [2023-08-04 09:50:59,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-08-04 09:50:59,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-08-04 09:50:59,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:50:59,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-08-04 09:50:59,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 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) [2023-08-04 09:50:59,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:59,908 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:50:59,908 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 562 flow. Second operand 4 states and 459 transitions. [2023-08-04 09:50:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 143 transitions, 1193 flow [2023-08-04 09:50:59,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 1133 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-04 09:50:59,964 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 603 flow [2023-08-04 09:50:59,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=603, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2023-08-04 09:50:59,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2023-08-04 09:50:59,964 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 603 flow [2023-08-04 09:50:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 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) [2023-08-04 09:50:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:50:59,965 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:50:59,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:50:59,965 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:50:59,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:50:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1029727668, now seen corresponding path program 2 times [2023-08-04 09:50:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:50:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551332503] [2023-08-04 09:50:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:50:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:50:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:51:00,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:00,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551332503] [2023-08-04 09:51:00,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551332503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:51:00,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:51:00,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:51:00,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255498696] [2023-08-04 09:51:00,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:51:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:51:00,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:00,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:51:00,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:51:00,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-04 09:51:00,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 603 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 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) [2023-08-04 09:51:00,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:00,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-04 09:51:00,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:01,401 INFO L124 PetriNetUnfolderBase]: 9960/14947 cut-off events. [2023-08-04 09:51:01,401 INFO L125 PetriNetUnfolderBase]: For 52134/52182 co-relation queries the response was YES. [2023-08-04 09:51:01,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62938 conditions, 14947 events. 9960/14947 cut-off events. For 52134/52182 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 87475 event pairs, 2474 based on Foata normal form. 30/14956 useless extension candidates. Maximal degree in co-relation 62230. Up to 12968 conditions per place. [2023-08-04 09:51:01,607 INFO L140 encePairwiseOnDemand]: 217/228 looper letters, 98 selfloop transitions, 9 changer transitions 22/137 dead transitions. [2023-08-04 09:51:01,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 137 transitions, 1132 flow [2023-08-04 09:51:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:51:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:51:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-08-04 09:51:01,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49890350877192985 [2023-08-04 09:51:01,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-08-04 09:51:01,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-08-04 09:51:01,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:01,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-08-04 09:51:01,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 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) [2023-08-04 09:51:01,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:51:01,613 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:51:01,613 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 603 flow. Second operand 4 states and 455 transitions. [2023-08-04 09:51:01,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 137 transitions, 1132 flow [2023-08-04 09:51:01,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 137 transitions, 1110 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-04 09:51:01,702 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 590 flow [2023-08-04 09:51:01,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2023-08-04 09:51:01,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2023-08-04 09:51:01,703 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 590 flow [2023-08-04 09:51:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 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) [2023-08-04 09:51:01,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:51:01,703 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:51:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 09:51:01,703 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:51:01,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:51:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 873569334, now seen corresponding path program 3 times [2023-08-04 09:51:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:51:01,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420940113] [2023-08-04 09:51:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:51:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:51:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420940113] [2023-08-04 09:51:01,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420940113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:51:01,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301594712] [2023-08-04 09:51:01,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 09:51:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:51:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:51:01,786 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) [2023-08-04 09:51:01,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:51:01,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 09:51:01,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:51:01,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 09:51:01,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:51:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:51:01,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:51:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 09:51:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301594712] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 09:51:02,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 09:51:02,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2023-08-04 09:51:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046377605] [2023-08-04 09:51:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:51:02,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:51:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:51:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:51:02,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-04 09:51:02,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 590 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 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) [2023-08-04 09:51:02,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:02,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-04 09:51:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:03,417 INFO L124 PetriNetUnfolderBase]: 11639/17334 cut-off events. [2023-08-04 09:51:03,417 INFO L125 PetriNetUnfolderBase]: For 61597/61605 co-relation queries the response was YES. [2023-08-04 09:51:03,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73820 conditions, 17334 events. 11639/17334 cut-off events. For 61597/61605 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 102738 event pairs, 1485 based on Foata normal form. 206/17520 useless extension candidates. Maximal degree in co-relation 73098. Up to 8510 conditions per place. [2023-08-04 09:51:03,520 INFO L140 encePairwiseOnDemand]: 215/228 looper letters, 138 selfloop transitions, 27 changer transitions 0/173 dead transitions. [2023-08-04 09:51:03,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 173 transitions, 1463 flow [2023-08-04 09:51:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:51:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:51:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-08-04 09:51:03,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197368421052632 [2023-08-04 09:51:03,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-08-04 09:51:03,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-08-04 09:51:03,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:03,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-08-04 09:51:03,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 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) [2023-08-04 09:51:03,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:51:03,524 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 228.0) internal successors, (1140), 5 states have internal predecessors, (1140), 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) [2023-08-04 09:51:03,524 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 590 flow. Second operand 4 states and 474 transitions. [2023-08-04 09:51:03,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 173 transitions, 1463 flow [2023-08-04 09:51:03,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 173 transitions, 1433 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-04 09:51:03,597 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 852 flow [2023-08-04 09:51:03,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=852, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2023-08-04 09:51:03,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2023-08-04 09:51:03,598 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 852 flow [2023-08-04 09:51:03,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 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) [2023-08-04 09:51:03,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:51:03,598 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:51:03,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:51:03,803 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,SelfDestructingSolverStorable21 [2023-08-04 09:51:03,803 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:51:03,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:51:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash -489982327, now seen corresponding path program 1 times [2023-08-04 09:51:03,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:51:03,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040677801] [2023-08-04 09:51:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:03,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:51:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:51:04,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040677801] [2023-08-04 09:51:04,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040677801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:51:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400276777] [2023-08-04 09:51:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:51:04,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:51:04,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:51:04,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:51:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:04,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 09:51:04,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:51:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:51:04,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:51:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:51:04,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400276777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:51:04,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:51:04,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2023-08-04 09:51:04,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722217278] [2023-08-04 09:51:04,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:51:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 09:51:04,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 09:51:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2023-08-04 09:51:06,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 228 [2023-08-04 09:51:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 852 flow. Second operand has 26 states, 26 states have (on average 72.76923076923077) internal successors, (1892), 26 states have internal predecessors, (1892), 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) [2023-08-04 09:51:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 228 [2023-08-04 09:51:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:16,273 INFO L124 PetriNetUnfolderBase]: 37760/52784 cut-off events. [2023-08-04 09:51:16,274 INFO L125 PetriNetUnfolderBase]: For 288835/288905 co-relation queries the response was YES. [2023-08-04 09:51:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244071 conditions, 52784 events. 37760/52784 cut-off events. For 288835/288905 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 308833 event pairs, 682 based on Foata normal form. 275/53055 useless extension candidates. Maximal degree in co-relation 242507. Up to 13234 conditions per place. [2023-08-04 09:51:16,642 INFO L140 encePairwiseOnDemand]: 201/228 looper letters, 985 selfloop transitions, 741 changer transitions 19/1749 dead transitions. [2023-08-04 09:51:16,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1749 transitions, 16719 flow [2023-08-04 09:51:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-08-04 09:51:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2023-08-04 09:51:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 10443 transitions. [2023-08-04 09:51:16,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34438068856351406 [2023-08-04 09:51:16,655 INFO L72 ComplementDD]: Start complementDD. Operand 133 states and 10443 transitions. [2023-08-04 09:51:16,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 133 states and 10443 transitions. [2023-08-04 09:51:16,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:16,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 133 states and 10443 transitions. [2023-08-04 09:51:16,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 134 states, 133 states have (on average 78.5187969924812) internal successors, (10443), 133 states have internal predecessors, (10443), 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) [2023-08-04 09:51:16,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 134 states, 134 states have (on average 228.0) internal successors, (30552), 134 states have internal predecessors, (30552), 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) [2023-08-04 09:51:16,694 INFO L81 ComplementDD]: Finished complementDD. Result has 134 states, 134 states have (on average 228.0) internal successors, (30552), 134 states have internal predecessors, (30552), 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) [2023-08-04 09:51:16,694 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 852 flow. Second operand 133 states and 10443 transitions. [2023-08-04 09:51:16,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1749 transitions, 16719 flow [2023-08-04 09:51:17,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1749 transitions, 16615 flow, removed 52 selfloop flow, removed 0 redundant places. [2023-08-04 09:51:17,341 INFO L231 Difference]: Finished difference. Result has 292 places, 899 transitions, 10694 flow [2023-08-04 09:51:17,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=10694, PETRI_PLACES=292, PETRI_TRANSITIONS=899} [2023-08-04 09:51:17,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2023-08-04 09:51:17,341 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 899 transitions, 10694 flow [2023-08-04 09:51:17,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 72.76923076923077) internal successors, (1892), 26 states have internal predecessors, (1892), 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) [2023-08-04 09:51:17,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:51:17,342 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:51:17,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:51:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:51:17,548 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:51:17,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:51:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1582406679, now seen corresponding path program 1 times [2023-08-04 09:51:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:51:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835518521] [2023-08-04 09:51:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:51:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:51:17,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:51:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835518521] [2023-08-04 09:51:17,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835518521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:51:17,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490235323] [2023-08-04 09:51:17,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:51:17,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:51:17,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:51:17,700 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:51:17,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:51:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:51:17,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 09:51:17,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:51:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:51:17,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:51:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:51:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490235323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:51:18,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:51:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-04 09:51:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848460655] [2023-08-04 09:51:18,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:51:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 09:51:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:51:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 09:51:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-04 09:51:18,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-04 09:51:18,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 899 transitions, 10694 flow. Second operand has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 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) [2023-08-04 09:51:18,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:51:18,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-04 09:51:18,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:51:41,143 INFO L124 PetriNetUnfolderBase]: 66925/97252 cut-off events. [2023-08-04 09:51:41,143 INFO L125 PetriNetUnfolderBase]: For 2298830/2300860 co-relation queries the response was YES. [2023-08-04 09:51:42,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737992 conditions, 97252 events. 66925/97252 cut-off events. For 2298830/2300860 co-relation queries the response was YES. Maximal size of possible extension queue 2444. Compared 683133 event pairs, 9032 based on Foata normal form. 388/95553 useless extension candidates. Maximal degree in co-relation 734085. Up to 27346 conditions per place. [2023-08-04 09:51:43,087 INFO L140 encePairwiseOnDemand]: 212/228 looper letters, 946 selfloop transitions, 1040 changer transitions 15/2042 dead transitions. [2023-08-04 09:51:43,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 2042 transitions, 28846 flow [2023-08-04 09:51:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 09:51:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 09:51:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2245 transitions. [2023-08-04 09:51:43,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923245614035088 [2023-08-04 09:51:43,091 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2245 transitions. [2023-08-04 09:51:43,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2245 transitions. [2023-08-04 09:51:43,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:51:43,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2245 transitions. [2023-08-04 09:51:43,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.25) internal successors, (2245), 20 states have internal predecessors, (2245), 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) [2023-08-04 09:51:43,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 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) [2023-08-04 09:51:43,101 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 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) [2023-08-04 09:51:43,101 INFO L175 Difference]: Start difference. First operand has 292 places, 899 transitions, 10694 flow. Second operand 20 states and 2245 transitions. [2023-08-04 09:51:43,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 2042 transitions, 28846 flow [2023-08-04 09:52:06,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 2042 transitions, 25543 flow, removed 1430 selfloop flow, removed 11 redundant places. [2023-08-04 09:52:06,371 INFO L231 Difference]: Finished difference. Result has 315 places, 1507 transitions, 20385 flow [2023-08-04 09:52:06,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=20385, PETRI_PLACES=315, PETRI_TRANSITIONS=1507} [2023-08-04 09:52:06,372 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2023-08-04 09:52:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1507 transitions, 20385 flow [2023-08-04 09:52:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.52941176470588) internal successors, (1556), 17 states have internal predecessors, (1556), 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) [2023-08-04 09:52:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:52:06,373 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:52:06,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 09:52:06,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:06,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:52:06,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:52:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash -464885485, now seen corresponding path program 1 times [2023-08-04 09:52:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:52:06,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831374401] [2023-08-04 09:52:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:52:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:52:06,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:52:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831374401] [2023-08-04 09:52:06,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831374401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:52:06,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738903889] [2023-08-04 09:52:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:52:06,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:52:06,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:52:06,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:52:06,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:52:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:52:06,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 09:52:06,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:52:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:52:06,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:52:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:52:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738903889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:52:07,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:52:07,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-04 09:52:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509566322] [2023-08-04 09:52:07,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:52:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 09:52:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:52:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 09:52:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-04 09:52:07,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-04 09:52:07,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1507 transitions, 20385 flow. Second operand has 17 states, 17 states have (on average 91.94117647058823) internal successors, (1563), 17 states have internal predecessors, (1563), 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) [2023-08-04 09:52:07,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:52:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-04 09:52:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:52:49,977 INFO L124 PetriNetUnfolderBase]: 89690/130011 cut-off events. [2023-08-04 09:52:49,978 INFO L125 PetriNetUnfolderBase]: For 3832609/3835213 co-relation queries the response was YES. [2023-08-04 09:52:52,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066437 conditions, 130011 events. 89690/130011 cut-off events. For 3832609/3835213 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 941627 event pairs, 11087 based on Foata normal form. 1330/129471 useless extension candidates. Maximal degree in co-relation 1060650. Up to 27577 conditions per place. [2023-08-04 09:52:53,681 INFO L140 encePairwiseOnDemand]: 212/228 looper letters, 1193 selfloop transitions, 2240 changer transitions 19/3489 dead transitions. [2023-08-04 09:52:53,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 3489 transitions, 53461 flow [2023-08-04 09:52:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-04 09:52:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-04 09:52:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2970 transitions. [2023-08-04 09:52:53,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2023-08-04 09:52:53,684 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2970 transitions. [2023-08-04 09:52:53,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2970 transitions. [2023-08-04 09:52:53,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:52:53,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2970 transitions. [2023-08-04 09:52:53,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.0) internal successors, (2970), 27 states have internal predecessors, (2970), 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) [2023-08-04 09:52:53,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 228.0) internal successors, (6384), 28 states have internal predecessors, (6384), 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) [2023-08-04 09:52:53,692 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 228.0) internal successors, (6384), 28 states have internal predecessors, (6384), 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) [2023-08-04 09:52:53,692 INFO L175 Difference]: Start difference. First operand has 315 places, 1507 transitions, 20385 flow. Second operand 27 states and 2970 transitions. [2023-08-04 09:52:53,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 3489 transitions, 53461 flow [2023-08-04 09:53:40,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 3489 transitions, 52099 flow, removed 629 selfloop flow, removed 3 redundant places. [2023-08-04 09:53:40,101 INFO L231 Difference]: Finished difference. Result has 359 places, 2824 transitions, 47287 flow [2023-08-04 09:53:40,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=19742, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=47287, PETRI_PLACES=359, PETRI_TRANSITIONS=2824} [2023-08-04 09:53:40,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2023-08-04 09:53:40,102 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 2824 transitions, 47287 flow [2023-08-04 09:53:40,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.94117647058823) internal successors, (1563), 17 states have internal predecessors, (1563), 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) [2023-08-04 09:53:40,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:53:40,103 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-04 09:53:40,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:53:40,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 09:53:40,309 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:53:40,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:53:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1634224857, now seen corresponding path program 2 times [2023-08-04 09:53:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:53:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342012783] [2023-08-04 09:53:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:53:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:53:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:53:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:53:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:53:40,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342012783] [2023-08-04 09:53:40,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342012783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:53:40,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539929739] [2023-08-04 09:53:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:53:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:53:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:53:40,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:53:40,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:53:40,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:53:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:53:40,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 09:53:40,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:53:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:53:40,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:53:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 09:53:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539929739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:53:40,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:53:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 17 [2023-08-04 09:53:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036705161] [2023-08-04 09:53:40,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:53:40,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 09:53:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:53:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 09:53:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-04 09:53:41,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-04 09:53:41,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 2824 transitions, 47287 flow. Second operand has 18 states, 18 states have (on average 93.11111111111111) internal successors, (1676), 18 states have internal predecessors, (1676), 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) [2023-08-04 09:53:41,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:53:41,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-04 09:53:41,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand