/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_chl-chromosome-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:19:28,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:19:28,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:19:28,608 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:19:28,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:19:28,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:19:28,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:19:28,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:19:28,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:19:28,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:19:28,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:19:28,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:19:28,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:19:28,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:19:28,628 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:19:28,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:19:28,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:19:28,629 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:19:28,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:19:28,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:19:28,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:19:28,631 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:19:28,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:19:28,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:19:28,632 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:19:28,632 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:19:28,632 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:19:28,633 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:19:28,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:19:28,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:19:28,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:28,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:19:28,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:19:28,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:19:28,635 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:19:28,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:19:28,636 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:19:28,636 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:19:28,636 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:19:28,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:19:28,637 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:19:28,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:19:28,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:19:28,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:19:28,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:19:28,825 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:19:28,826 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:19:28,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 08:19:29,946 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:19:30,116 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:19:30,117 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 08:19:30,123 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b71104b6/d38c95bc983b4ab2817e0310fc2f3eff/FLAG308bb5e84 [2023-08-04 08:19:30,135 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b71104b6/d38c95bc983b4ab2817e0310fc2f3eff [2023-08-04 08:19:30,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:19:30,139 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:19:30,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:30,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:19:30,145 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:19:30,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2865762c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30, skipping insertion in model container [2023-08-04 08:19:30,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,173 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:19:30,342 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_chl-chromosome-trans.wvr_bound2.c[3277,3290] [2023-08-04 08:19:30,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:30,356 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:19:30,381 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_chl-chromosome-trans.wvr_bound2.c[3277,3290] [2023-08-04 08:19:30,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:30,395 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:19:30,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30 WrapperNode [2023-08-04 08:19:30,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:30,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:30,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:19:30,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:19:30,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,439 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 325 [2023-08-04 08:19:30,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:30,440 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:19:30,440 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:19:30,440 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:19:30,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:19:30,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:19:30,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:19:30,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:19:30,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (1/1) ... [2023-08-04 08:19:30,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:30,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:30,504 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 08:19:30,514 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 08:19:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:19:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:19:30,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:19:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:19:30,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:19:30,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:19:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:19:30,540 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 08:19:30,635 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:19:30,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:19:30,967 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:19:30,980 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:19:30,981 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:19:30,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:30 BoogieIcfgContainer [2023-08-04 08:19:30,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:19:30,994 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:19:30,994 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:19:30,998 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:19:30,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:19:30" (1/3) ... [2023-08-04 08:19:30,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f452d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:30, skipping insertion in model container [2023-08-04 08:19:30,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:30" (2/3) ... [2023-08-04 08:19:30,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f452d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:30, skipping insertion in model container [2023-08-04 08:19:30,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:30" (3/3) ... [2023-08-04 08:19:31,000 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-trans.wvr_bound2.c [2023-08-04 08:19:31,007 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:19:31,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:19:31,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:19:31,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:19:31,135 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:19:31,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,443 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 08:19:31,443 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:31,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 08:19:31,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:31,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:31,664 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 08:19:31,664 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:31,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 08:19:31,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 32940 [2023-08-04 08:19:40,083 INFO L134 LiptonReduction]: Checked pairs total: 41765 [2023-08-04 08:19:40,084 INFO L136 LiptonReduction]: Total number of compositions: 385 [2023-08-04 08:19:40,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:19:40,102 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;@69b38a5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:40,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:19:40,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:40,108 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2023-08-04 08:19:40,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:40,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:40,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:40,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:40,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -791606768, now seen corresponding path program 1 times [2023-08-04 08:19:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665516829] [2023-08-04 08:19:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:40,491 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 08:19:40,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:40,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665516829] [2023-08-04 08:19:40,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665516829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:40,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:40,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935808008] [2023-08-04 08:19:40,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:40,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:40,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:40,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 751 [2023-08-04 08:19:40,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 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 08:19:40,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:40,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 751 [2023-08-04 08:19:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:41,442 INFO L124 PetriNetUnfolderBase]: 6180/9007 cut-off events. [2023-08-04 08:19:41,443 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2023-08-04 08:19:41,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18156 conditions, 9007 events. 6180/9007 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45787 event pairs, 4648 based on Foata normal form. 0/6893 useless extension candidates. Maximal degree in co-relation 15073. Up to 8700 conditions per place. [2023-08-04 08:19:41,491 INFO L140 encePairwiseOnDemand]: 743/751 looper letters, 49 selfloop transitions, 6 changer transitions 3/61 dead transitions. [2023-08-04 08:19:41,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 274 flow [2023-08-04 08:19:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-08-04 08:19:41,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429649356413671 [2023-08-04 08:19:41,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-08-04 08:19:41,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-08-04 08:19:41,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:41,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-08-04 08:19:41,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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 08:19:41,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:41,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:41,525 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 160 flow. Second operand 3 states and 998 transitions. [2023-08-04 08:19:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 274 flow [2023-08-04 08:19:41,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:41,532 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 178 flow [2023-08-04 08:19:41,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2023-08-04 08:19:41,536 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:19:41,537 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 178 flow [2023-08-04 08:19:41,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 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 08:19:41,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:41,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:19:41,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:41,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2094967245, now seen corresponding path program 1 times [2023-08-04 08:19:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:41,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508929476] [2023-08-04 08:19:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:41,638 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 08:19:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:41,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508929476] [2023-08-04 08:19:41,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508929476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:41,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:41,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444706152] [2023-08-04 08:19:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:41,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:41,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 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 08:19:41,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:41,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:41,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:42,395 INFO L124 PetriNetUnfolderBase]: 5982/8652 cut-off events. [2023-08-04 08:19:42,395 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2023-08-04 08:19:42,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 8652 events. 5982/8652 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 43477 event pairs, 2900 based on Foata normal form. 0/6615 useless extension candidates. Maximal degree in co-relation 17419. Up to 8378 conditions per place. [2023-08-04 08:19:42,435 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 58 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 08:19:42,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 312 flow [2023-08-04 08:19:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1022 transitions. [2023-08-04 08:19:42,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536173990235242 [2023-08-04 08:19:42,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1022 transitions. [2023-08-04 08:19:42,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1022 transitions. [2023-08-04 08:19:42,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:42,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1022 transitions. [2023-08-04 08:19:42,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 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 08:19:42,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:42,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:42,446 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 178 flow. Second operand 3 states and 1022 transitions. [2023-08-04 08:19:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 312 flow [2023-08-04 08:19:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 294 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:19:42,452 INFO L231 Difference]: Finished difference. Result has 49 places, 58 transitions, 168 flow [2023-08-04 08:19:42,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=58} [2023-08-04 08:19:42,453 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-04 08:19:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 58 transitions, 168 flow [2023-08-04 08:19:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 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 08:19:42,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:42,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:42,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:19:42,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:42,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 158958371, now seen corresponding path program 1 times [2023-08-04 08:19:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622837051] [2023-08-04 08:19:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:42,512 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 08:19:42,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:42,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622837051] [2023-08-04 08:19:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622837051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:42,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818961439] [2023-08-04 08:19:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:42,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:42,517 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 08:19:42,543 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 08:19:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:42,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:42,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:42,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818961439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:42,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513711329] [2023-08-04 08:19:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:42,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:42,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:42,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 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 08:19:42,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:42,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:42,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:43,377 INFO L124 PetriNetUnfolderBase]: 5812/8392 cut-off events. [2023-08-04 08:19:43,377 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-04 08:19:43,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16911 conditions, 8392 events. 5812/8392 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 41632 event pairs, 2874 based on Foata normal form. 0/6421 useless extension candidates. Maximal degree in co-relation 16872. Up to 8056 conditions per place. [2023-08-04 08:19:43,414 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 63 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 08:19:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 322 flow [2023-08-04 08:19:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1027 transitions. [2023-08-04 08:19:43,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45583666222814023 [2023-08-04 08:19:43,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1027 transitions. [2023-08-04 08:19:43,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1027 transitions. [2023-08-04 08:19:43,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:43,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1027 transitions. [2023-08-04 08:19:43,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 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 08:19:43,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:43,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:43,426 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 168 flow. Second operand 3 states and 1027 transitions. [2023-08-04 08:19:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 322 flow [2023-08-04 08:19:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:43,428 INFO L231 Difference]: Finished difference. Result has 50 places, 58 transitions, 172 flow [2023-08-04 08:19:43,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=58} [2023-08-04 08:19:43,429 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-04 08:19:43,429 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 58 transitions, 172 flow [2023-08-04 08:19:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 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 08:19:43,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:43,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:43,443 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 08:19:43,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:43,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:43,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -326794456, now seen corresponding path program 1 times [2023-08-04 08:19:43,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952404508] [2023-08-04 08:19:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:43,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952404508] [2023-08-04 08:19:43,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952404508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:43,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85442591] [2023-08-04 08:19:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:43,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:43,697 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 08:19:43,721 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 08:19:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:43,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:43,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:43,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85442591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:43,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:43,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100421563] [2023-08-04 08:19:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:43,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:43,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 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 08:19:43,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:43,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:43,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:44,447 INFO L124 PetriNetUnfolderBase]: 5787/8378 cut-off events. [2023-08-04 08:19:44,448 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-04 08:19:44,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16947 conditions, 8378 events. 5787/8378 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 41557 event pairs, 2813 based on Foata normal form. 0/6468 useless extension candidates. Maximal degree in co-relation 16908. Up to 7556 conditions per place. [2023-08-04 08:19:44,486 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 68 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 08:19:44,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 346 flow [2023-08-04 08:19:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1032 transitions. [2023-08-04 08:19:44,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580559254327563 [2023-08-04 08:19:44,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1032 transitions. [2023-08-04 08:19:44,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1032 transitions. [2023-08-04 08:19:44,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:44,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1032 transitions. [2023-08-04 08:19:44,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 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 08:19:44,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:44,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:44,497 INFO L175 Difference]: Start difference. First operand has 50 places, 58 transitions, 172 flow. Second operand 3 states and 1032 transitions. [2023-08-04 08:19:44,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 346 flow [2023-08-04 08:19:44,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:44,501 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 176 flow [2023-08-04 08:19:44,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2023-08-04 08:19:44,507 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 08:19:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 176 flow [2023-08-04 08:19:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 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 08:19:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:44,508 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] [2023-08-04 08:19:44,513 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 08:19:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:19:44,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:44,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -418454926, now seen corresponding path program 1 times [2023-08-04 08:19:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:44,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774975167] [2023-08-04 08:19:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:44,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:44,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774975167] [2023-08-04 08:19:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774975167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:44,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776146505] [2023-08-04 08:19:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:44,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:44,771 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 08:19:44,799 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 08:19:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:44,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:44,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:19:44,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776146505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:44,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:44,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581513171] [2023-08-04 08:19:44,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:44,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:44,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 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 08:19:44,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:44,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:44,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:45,335 INFO L124 PetriNetUnfolderBase]: 3462/5128 cut-off events. [2023-08-04 08:19:45,336 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-08-04 08:19:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10818 conditions, 5128 events. 3462/5128 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 23098 event pairs, 1957 based on Foata normal form. 0/4153 useless extension candidates. Maximal degree in co-relation 10778. Up to 3781 conditions per place. [2023-08-04 08:19:45,357 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 73 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 08:19:45,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 372 flow [2023-08-04 08:19:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1036 transitions. [2023-08-04 08:19:45,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45983133599644915 [2023-08-04 08:19:45,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1036 transitions. [2023-08-04 08:19:45,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1036 transitions. [2023-08-04 08:19:45,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:45,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1036 transitions. [2023-08-04 08:19:45,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 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 08:19:45,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:45,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:45,368 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 176 flow. Second operand 3 states and 1036 transitions. [2023-08-04 08:19:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 372 flow [2023-08-04 08:19:45,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:45,373 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 184 flow [2023-08-04 08:19:45,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-08-04 08:19:45,375 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-04 08:19:45,375 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 184 flow [2023-08-04 08:19:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 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 08:19:45,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:45,376 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, 1, 1, 1, 1, 1] [2023-08-04 08:19:45,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:45,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:45,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 516097824, now seen corresponding path program 1 times [2023-08-04 08:19:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159600967] [2023-08-04 08:19:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:19:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159600967] [2023-08-04 08:19:45,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159600967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481149825] [2023-08-04 08:19:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:45,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:45,667 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 08:19:45,687 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 08:19:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:45,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:45,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:19:45,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481149825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186044578] [2023-08-04 08:19:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:45,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:45,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 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 08:19:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:46,189 INFO L124 PetriNetUnfolderBase]: 2984/4429 cut-off events. [2023-08-04 08:19:46,189 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-08-04 08:19:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9640 conditions, 4429 events. 2984/4429 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19327 event pairs, 2069 based on Foata normal form. 0/3782 useless extension candidates. Maximal degree in co-relation 9599. Up to 3761 conditions per place. [2023-08-04 08:19:46,206 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 74 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 08:19:46,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 382 flow [2023-08-04 08:19:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1036 transitions. [2023-08-04 08:19:46,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45983133599644915 [2023-08-04 08:19:46,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1036 transitions. [2023-08-04 08:19:46,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1036 transitions. [2023-08-04 08:19:46,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:46,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1036 transitions. [2023-08-04 08:19:46,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.3333333333333) internal successors, (1036), 3 states have internal predecessors, (1036), 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 08:19:46,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:46,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:46,219 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 184 flow. Second operand 3 states and 1036 transitions. [2023-08-04 08:19:46,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 382 flow [2023-08-04 08:19:46,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:46,225 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 194 flow [2023-08-04 08:19:46,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-08-04 08:19:46,227 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 08:19:46,227 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 194 flow [2023-08-04 08:19:46,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 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 08:19:46,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:46,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:46,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:46,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:46,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:46,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1636077523, now seen corresponding path program 1 times [2023-08-04 08:19:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:46,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187940087] [2023-08-04 08:19:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:19:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187940087] [2023-08-04 08:19:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187940087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659974827] [2023-08-04 08:19:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:46,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:46,514 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 08:19:46,520 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 08:19:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:46,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:46,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:19:46,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659974827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:19:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854605925] [2023-08-04 08:19:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:46,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 751 [2023-08-04 08:19:46,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 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 08:19:46,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:46,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 751 [2023-08-04 08:19:46,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:47,083 INFO L124 PetriNetUnfolderBase]: 2968/4400 cut-off events. [2023-08-04 08:19:47,084 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2023-08-04 08:19:47,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 4400 events. 2968/4400 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19076 event pairs, 2310 based on Foata normal form. 0/3787 useless extension candidates. Maximal degree in co-relation 9606. Up to 4227 conditions per place. [2023-08-04 08:19:47,097 INFO L140 encePairwiseOnDemand]: 748/751 looper letters, 68 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 08:19:47,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 372 flow [2023-08-04 08:19:47,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1032 transitions. [2023-08-04 08:19:47,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580559254327563 [2023-08-04 08:19:47,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1032 transitions. [2023-08-04 08:19:47,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1032 transitions. [2023-08-04 08:19:47,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:47,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1032 transitions. [2023-08-04 08:19:47,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 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 08:19:47,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:47,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 751.0) internal successors, (3004), 4 states have internal predecessors, (3004), 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 08:19:47,106 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 194 flow. Second operand 3 states and 1032 transitions. [2023-08-04 08:19:47,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 372 flow [2023-08-04 08:19:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:47,118 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 192 flow [2023-08-04 08:19:47,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-08-04 08:19:47,118 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 08:19:47,118 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 192 flow [2023-08-04 08:19:47,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 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 08:19:47,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:47,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:47,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:47,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:47,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:47,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash 358661255, now seen corresponding path program 1 times [2023-08-04 08:19:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:47,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271717639] [2023-08-04 08:19:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:47,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:47,402 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 08:19:47,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:47,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271717639] [2023-08-04 08:19:47,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271717639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:47,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868133546] [2023-08-04 08:19:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:47,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:47,404 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 08:19:47,406 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 08:19:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:47,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:47,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:47,574 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 08:19:47,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:47,601 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 08:19:47,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868133546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:47,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:47,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:19:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775987690] [2023-08-04 08:19:47,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:47,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:47,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:47,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 751 [2023-08-04 08:19:47,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 308.5) internal successors, (2468), 8 states have internal predecessors, (2468), 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 08:19:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 751 [2023-08-04 08:19:47,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:47,780 INFO L124 PetriNetUnfolderBase]: 14/46 cut-off events. [2023-08-04 08:19:47,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:47,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 46 events. 14/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 117. Up to 20 conditions per place. [2023-08-04 08:19:47,780 INFO L140 encePairwiseOnDemand]: 742/751 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-08-04 08:19:47,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 174 flow [2023-08-04 08:19:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:19:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:19:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2459 transitions. [2023-08-04 08:19:47,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40928761651131823 [2023-08-04 08:19:47,787 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2459 transitions. [2023-08-04 08:19:47,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2459 transitions. [2023-08-04 08:19:47,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:47,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2459 transitions. [2023-08-04 08:19:47,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.375) internal successors, (2459), 8 states have internal predecessors, (2459), 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 08:19:47,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 751.0) internal successors, (6759), 9 states have internal predecessors, (6759), 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 08:19:47,799 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 751.0) internal successors, (6759), 9 states have internal predecessors, (6759), 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 08:19:47,799 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 192 flow. Second operand 8 states and 2459 transitions. [2023-08-04 08:19:47,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 174 flow [2023-08-04 08:19:47,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:47,800 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 08:19:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=751, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 08:19:47,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -21 predicate places. [2023-08-04 08:19:47,801 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 08:19:47,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 308.5) internal successors, (2468), 8 states have internal predecessors, (2468), 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 08:19:47,804 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:19:47,810 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 08:19:48,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:48,011 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:48,013 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:19:48,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,116 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 08:19:48,116 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:48,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 08:19:48,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:48,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,129 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:19:48,212 INFO L124 PetriNetUnfolderBase]: 129/974 cut-off events. [2023-08-04 08:19:48,213 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 974 events. 129/974 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5518 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 559. Up to 16 conditions per place. [2023-08-04 08:19:48,237 INFO L119 LiptonReduction]: Number of co-enabled transitions 32940 [2023-08-04 08:19:55,516 INFO L134 LiptonReduction]: Checked pairs total: 42603 [2023-08-04 08:19:55,516 INFO L136 LiptonReduction]: Total number of compositions: 394 [2023-08-04 08:19:55,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:19:55,518 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;@69b38a5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:55,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:19:55,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:55,522 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2023-08-04 08:19:55,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:55,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:55,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:55,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:55,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1299212021, now seen corresponding path program 1 times [2023-08-04 08:19:55,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879123698] [2023-08-04 08:19:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:55,565 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 08:19:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879123698] [2023-08-04 08:19:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879123698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:55,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:19:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563537087] [2023-08-04 08:19:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:55,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 760 [2023-08-04 08:19:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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 08:19:55,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:55,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 760 [2023-08-04 08:19:55,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:56,133 INFO L124 PetriNetUnfolderBase]: 6180/9007 cut-off events. [2023-08-04 08:19:56,133 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2023-08-04 08:19:56,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18156 conditions, 9007 events. 6180/9007 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 45726 event pairs, 4648 based on Foata normal form. 0/6893 useless extension candidates. Maximal degree in co-relation 15073. Up to 8700 conditions per place. [2023-08-04 08:19:56,152 INFO L140 encePairwiseOnDemand]: 751/760 looper letters, 30 selfloop transitions, 6 changer transitions 22/61 dead transitions. [2023-08-04 08:19:56,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 274 flow [2023-08-04 08:19:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2023-08-04 08:19:56,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381578947368421 [2023-08-04 08:19:56,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2023-08-04 08:19:56,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2023-08-04 08:19:56,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:56,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2023-08-04 08:19:56,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 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 08:19:56,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 760.0) internal successors, (3040), 4 states have internal predecessors, (3040), 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 08:19:56,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 760.0) internal successors, (3040), 4 states have internal predecessors, (3040), 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 08:19:56,163 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 162 flow. Second operand 3 states and 999 transitions. [2023-08-04 08:19:56,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 274 flow [2023-08-04 08:19:56,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:56,166 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 119 flow [2023-08-04 08:19:56,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=760, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-08-04 08:19:56,166 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:19:56,167 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 119 flow [2023-08-04 08:19:56,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 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 08:19:56,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:56,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:19:56,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:56,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -266973487, now seen corresponding path program 1 times [2023-08-04 08:19:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:56,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351897267] [2023-08-04 08:19:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351897267] [2023-08-04 08:19:56,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351897267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:56,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72965972] [2023-08-04 08:19:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:56,220 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 08:19:56,242 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 08:19:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:56,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:56,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:56,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:56,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72965972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:56,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:56,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:19:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887657653] [2023-08-04 08:19:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:56,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:56,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:56,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 760 [2023-08-04 08:19:56,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 119 flow. Second operand has 8 states, 8 states have (on average 309.0) internal successors, (2472), 8 states have internal predecessors, (2472), 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 08:19:56,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:56,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 760 [2023-08-04 08:19:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:56,752 INFO L124 PetriNetUnfolderBase]: 1581/2359 cut-off events. [2023-08-04 08:19:56,753 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 08:19:56,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 2359 events. 1581/2359 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9699 event pairs, 1228 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 4781. Up to 2316 conditions per place. [2023-08-04 08:19:56,760 INFO L140 encePairwiseOnDemand]: 753/760 looper letters, 30 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2023-08-04 08:19:56,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 245 flow [2023-08-04 08:19:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:19:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:19:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1896 transitions. [2023-08-04 08:19:56,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2023-08-04 08:19:56,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1896 transitions. [2023-08-04 08:19:56,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1896 transitions. [2023-08-04 08:19:56,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:56,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1896 transitions. [2023-08-04 08:19:56,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 316.0) internal successors, (1896), 6 states have internal predecessors, (1896), 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 08:19:56,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 760.0) internal successors, (5320), 7 states have internal predecessors, (5320), 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 08:19:56,776 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 760.0) internal successors, (5320), 7 states have internal predecessors, (5320), 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 08:19:56,776 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 119 flow. Second operand 6 states and 1896 transitions. [2023-08-04 08:19:56,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 245 flow [2023-08-04 08:19:56,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:56,778 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 209 flow [2023-08-04 08:19:56,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=760, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 08:19:56,779 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-04 08:19:56,779 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 209 flow [2023-08-04 08:19:56,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 309.0) internal successors, (2472), 8 states have internal predecessors, (2472), 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 08:19:56,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:56,780 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:56,788 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 08:19:56,986 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 08:19:56,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:56,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash -265066485, now seen corresponding path program 2 times [2023-08-04 08:19:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630959820] [2023-08-04 08:19:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630959820] [2023-08-04 08:19:57,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630959820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:57,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892139208] [2023-08-04 08:19:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:19:57,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:57,147 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 08:19:57,150 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 08:19:57,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:19:57,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:19:57,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:19:57,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:57,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:57,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892139208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:57,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:57,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 08:19:57,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256617390] [2023-08-04 08:19:57,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:57,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:19:57,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:19:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:19:57,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 760 [2023-08-04 08:19:57,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 209 flow. Second operand has 17 states, 17 states have (on average 308.70588235294116) internal successors, (5248), 17 states have internal predecessors, (5248), 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 08:19:57,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:57,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 760 [2023-08-04 08:19:57,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:57,968 INFO L124 PetriNetUnfolderBase]: 1581/2362 cut-off events. [2023-08-04 08:19:57,968 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:19:57,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2362 events. 1581/2362 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9741 event pairs, 1228 based on Foata normal form. 1/1969 useless extension candidates. Maximal degree in co-relation 4772. Up to 2316 conditions per place. [2023-08-04 08:19:57,981 INFO L140 encePairwiseOnDemand]: 753/760 looper letters, 30 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-04 08:19:57,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 323 flow [2023-08-04 08:19:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:19:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:19:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2200 transitions. [2023-08-04 08:19:57,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2023-08-04 08:19:57,987 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2200 transitions. [2023-08-04 08:19:57,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2200 transitions. [2023-08-04 08:19:57,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:57,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2200 transitions. [2023-08-04 08:19:57,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 314.2857142857143) internal successors, (2200), 7 states have internal predecessors, (2200), 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 08:19:58,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 760.0) internal successors, (6080), 8 states have internal predecessors, (6080), 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 08:19:58,001 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 760.0) internal successors, (6080), 8 states have internal predecessors, (6080), 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 08:19:58,001 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 209 flow. Second operand 7 states and 2200 transitions. [2023-08-04 08:19:58,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 323 flow [2023-08-04 08:19:58,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 299 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:58,004 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 253 flow [2023-08-04 08:19:58,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=760, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-04 08:19:58,004 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:19:58,005 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 253 flow [2023-08-04 08:19:58,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 308.70588235294116) internal successors, (5248), 17 states have internal predecessors, (5248), 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 08:19:58,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:58,006 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:58,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:19:58,212 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 08:19:58,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:58,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2137195217, now seen corresponding path program 3 times [2023-08-04 08:19:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803358297] [2023-08-04 08:19:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:58,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:19:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:58,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:19:58,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:19:58,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:19:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:19:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:19:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 08:19:58,347 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:19:58,348 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:19:58,348 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:19:58,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:19:58,387 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:19:58,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 08:19:59,225 INFO L124 PetriNetUnfolderBase]: 976/5128 cut-off events. [2023-08-04 08:19:59,225 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 08:19:59,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 5128 events. 976/5128 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 45361 event pairs, 22 based on Foata normal form. 0/4396 useless extension candidates. Maximal degree in co-relation 3118. Up to 192 conditions per place. [2023-08-04 08:19:59,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 08:19:59,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 513 transitions, 1116 flow [2023-08-04 08:19:59,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:59,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 513 transitions, 1116 flow [2023-08-04 08:19:59,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 513 transitions, 1116 flow [2023-08-04 08:19:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 513 transitions, 1116 flow [2023-08-04 08:20:00,135 INFO L124 PetriNetUnfolderBase]: 976/5128 cut-off events. [2023-08-04 08:20:00,135 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 08:20:00,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5802 conditions, 5128 events. 976/5128 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 45361 event pairs, 22 based on Foata normal form. 0/4396 useless extension candidates. Maximal degree in co-relation 3118. Up to 192 conditions per place. [2023-08-04 08:20:00,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 108000 [2023-08-04 08:20:08,532 INFO L134 LiptonReduction]: Checked pairs total: 160188 [2023-08-04 08:20:08,532 INFO L136 LiptonReduction]: Total number of compositions: 529 [2023-08-04 08:20:08,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:20:08,534 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;@69b38a5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:20:08,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:20:08,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:20:08,537 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 08:20:08,537 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:20:08,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:08,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:08,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:08,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -784443243, now seen corresponding path program 1 times [2023-08-04 08:20:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699766881] [2023-08-04 08:20:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:08,581 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 08:20:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699766881] [2023-08-04 08:20:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699766881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:08,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:20:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818580793] [2023-08-04 08:20:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:20:08,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 436 out of 1042 [2023-08-04 08:20:08,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 439.3333333333333) internal successors, (1318), 3 states have internal predecessors, (1318), 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 08:20:08,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:08,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 436 of 1042 [2023-08-04 08:20:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand