/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:11:54,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:11:54,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:11:54,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:11:54,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:11:54,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:11:54,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:11:54,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:11:54,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:11:54,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:11:54,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:11:54,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:11:54,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:11:54,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:11:54,843 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:11:54,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:11:54,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:11:54,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:11:54,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:11:54,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:11:54,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:11:54,845 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:11:54,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:11:54,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:11:54,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:11:54,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:11:54,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:11:54,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:11:54,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:11:54,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:11:54,849 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:11:54,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:11:55,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:11:55,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:11:55,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:11:55,079 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:11:55,080 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:11:55,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-subst.wvr_bound2.c [2023-08-04 02:11:56,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:11:56,340 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:11:56,341 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-subst.wvr_bound2.c [2023-08-04 02:11:56,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099cbd402/93f17ce358b34351b65a93bb99a9ccf0/FLAG3e264cb88 [2023-08-04 02:11:56,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099cbd402/93f17ce358b34351b65a93bb99a9ccf0 [2023-08-04 02:11:56,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:11:56,359 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:11:56,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:11:56,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:11:56,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:11:56,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc75f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56, skipping insertion in model container [2023-08-04 02:11:56,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,388 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:11:56,519 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-simpl-str-subst.wvr_bound2.c[2818,2831] [2023-08-04 02:11:56,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:11:56,529 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:11:56,558 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-simpl-str-subst.wvr_bound2.c[2818,2831] [2023-08-04 02:11:56,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:11:56,571 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:11:56,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56 WrapperNode [2023-08-04 02:11:56,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:11:56,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:11:56,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:11:56,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:11:56,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,608 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 221 [2023-08-04 02:11:56,608 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:11:56,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:11:56,609 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:11:56,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:11:56,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:11:56,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:11:56,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:11:56,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:11:56,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (1/1) ... [2023-08-04 02:11:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:11:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:11:56,680 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 02:11:56,683 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 02:11:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:11:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:11:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:11:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:11:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:11:56,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:11:56,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:11:56,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:11:56,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:11:56,710 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 02:11:56,791 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:11:56,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:11:57,103 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:11:57,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:11:57,111 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:11:57,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:11:57 BoogieIcfgContainer [2023-08-04 02:11:57,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:11:57,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:11:57,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:11:57,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:11:57,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:11:56" (1/3) ... [2023-08-04 02:11:57,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e365509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:11:57, skipping insertion in model container [2023-08-04 02:11:57,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:11:56" (2/3) ... [2023-08-04 02:11:57,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e365509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:11:57, skipping insertion in model container [2023-08-04 02:11:57,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:11:57" (3/3) ... [2023-08-04 02:11:57,119 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-simpl-str-subst.wvr_bound2.c [2023-08-04 02:11:57,124 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:11:57,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:11:57,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:11:57,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:11:57,238 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:11:57,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,501 INFO L124 PetriNetUnfolderBase]: 118/855 cut-off events. [2023-08-04 02:11:57,501 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:11:57,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 855 events. 118/855 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5166 event pairs, 0 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 448. Up to 16 conditions per place. [2023-08-04 02:11:57,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:11:57,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,557 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 249 transitions, 540 flow [2023-08-04 02:11:57,683 INFO L124 PetriNetUnfolderBase]: 118/855 cut-off events. [2023-08-04 02:11:57,683 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:11:57,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 855 events. 118/855 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5166 event pairs, 0 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 448. Up to 16 conditions per place. [2023-08-04 02:11:57,716 INFO L119 LiptonReduction]: Number of co-enabled transitions 23868 [2023-08-04 02:12:03,674 INFO L134 LiptonReduction]: Checked pairs total: 25911 [2023-08-04 02:12:03,674 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-04 02:12:03,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:12:03,700 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;@d964556, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:12:03,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:12:03,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:12:03,706 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:12:03,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:12:03,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:03,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:12:03,707 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 02:12:03,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash -516273579, now seen corresponding path program 1 times [2023-08-04 02:12:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015834705] [2023-08-04 02:12:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:12:03,824 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:12:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:12:03,878 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:12:03,880 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:12:03,880 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:12:03,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:12:03,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:12:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:12:03,883 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:12:03,885 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:12:03,885 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:12:03,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:12:03,938 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:12:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:04,924 INFO L124 PetriNetUnfolderBase]: 1002/5136 cut-off events. [2023-08-04 02:12:04,924 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:05,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5810 conditions, 5136 events. 1002/5136 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 45022 event pairs, 22 based on Foata normal form. 0/4378 useless extension candidates. Maximal degree in co-relation 3042. Up to 192 conditions per place. [2023-08-04 02:12:05,012 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:05,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:05,060 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:12:05,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:05,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:05,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:05,932 INFO L124 PetriNetUnfolderBase]: 1002/5136 cut-off events. [2023-08-04 02:12:05,933 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:06,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5810 conditions, 5136 events. 1002/5136 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 45022 event pairs, 22 based on Foata normal form. 0/4378 useless extension candidates. Maximal degree in co-relation 3042. Up to 192 conditions per place. [2023-08-04 02:12:06,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 72828 [2023-08-04 02:12:13,782 INFO L134 LiptonReduction]: Checked pairs total: 89862 [2023-08-04 02:12:13,782 INFO L136 LiptonReduction]: Total number of compositions: 402 [2023-08-04 02:12:13,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:12:13,785 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;@d964556, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:12:13,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:12:13,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:12:13,793 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-08-04 02:12:13,793 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:12:13,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:13,793 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:12:13,793 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 02:12:13,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1750722464, now seen corresponding path program 1 times [2023-08-04 02:12:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:13,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741953977] [2023-08-04 02:12:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:12:13,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:13,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741953977] [2023-08-04 02:12:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741953977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:13,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500073149] [2023-08-04 02:12:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:13,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:13,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:13,942 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 02:12:13,945 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 02:12:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:14,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:12:14,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:12:14,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:14,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500073149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:14,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:14,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:12:14,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730179535] [2023-08-04 02:12:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:14,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:12:14,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 765 [2023-08-04 02:12:14,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 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 02:12:14,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:14,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 765 [2023-08-04 02:12:14,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:18,592 INFO L124 PetriNetUnfolderBase]: 23088/35044 cut-off events. [2023-08-04 02:12:18,593 INFO L125 PetriNetUnfolderBase]: For 6363/6363 co-relation queries the response was YES. [2023-08-04 02:12:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72886 conditions, 35044 events. 23088/35044 cut-off events. For 6363/6363 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 228082 event pairs, 12752 based on Foata normal form. 0/32455 useless extension candidates. Maximal degree in co-relation 29151. Up to 32764 conditions per place. [2023-08-04 02:12:18,666 INFO L140 encePairwiseOnDemand]: 759/765 looper letters, 23 selfloop transitions, 5 changer transitions 33/66 dead transitions. [2023-08-04 02:12:18,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 334 flow [2023-08-04 02:12:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:12:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:12:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1626 transitions. [2023-08-04 02:12:18,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250980392156863 [2023-08-04 02:12:18,691 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1626 transitions. [2023-08-04 02:12:18,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1626 transitions. [2023-08-04 02:12:18,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:18,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1626 transitions. [2023-08-04 02:12:18,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.2) internal successors, (1626), 5 states have internal predecessors, (1626), 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 02:12:18,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:18,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:18,725 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 5 states and 1626 transitions. [2023-08-04 02:12:18,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 334 flow [2023-08-04 02:12:18,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:12:18,743 INFO L231 Difference]: Finished difference. Result has 57 places, 29 transitions, 105 flow [2023-08-04 02:12:18,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=57, PETRI_TRANSITIONS=29} [2023-08-04 02:12:18,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-08-04 02:12:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 29 transitions, 105 flow [2023-08-04 02:12:18,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 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 02:12:18,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:18,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:12:18,761 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 02:12:18,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:18,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:18,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:18,958 INFO L85 PathProgramCache]: Analyzing trace with hash 650640312, now seen corresponding path program 1 times [2023-08-04 02:12:18,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:18,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389944966] [2023-08-04 02:12:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:18,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:19,030 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 02:12:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389944966] [2023-08-04 02:12:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389944966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:19,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:12:19,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:12:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367711979] [2023-08-04 02:12:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:12:19,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 765 [2023-08-04 02:12:19,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 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 02:12:19,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:19,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 765 [2023-08-04 02:12:19,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:19,524 INFO L124 PetriNetUnfolderBase]: 1984/3191 cut-off events. [2023-08-04 02:12:19,524 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 02:12:19,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 3191 events. 1984/3191 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15901 event pairs, 1498 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 2883. Up to 2957 conditions per place. [2023-08-04 02:12:19,534 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:12:19,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 02:12:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 967 transitions. [2023-08-04 02:12:19,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42135076252723314 [2023-08-04 02:12:19,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 967 transitions. [2023-08-04 02:12:19,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 967 transitions. [2023-08-04 02:12:19,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:19,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 967 transitions. [2023-08-04 02:12:19,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 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 02:12:19,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 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 02:12:19,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 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 02:12:19,547 INFO L175 Difference]: Start difference. First operand has 57 places, 29 transitions, 105 flow. Second operand 3 states and 967 transitions. [2023-08-04 02:12:19,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 02:12:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:19,550 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 02:12:19,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 02:12:19,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-04 02:12:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 02:12:19,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 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 02:12:19,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:19,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:12:19,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:19,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash -282995184, now seen corresponding path program 1 times [2023-08-04 02:12:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:19,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298694317] [2023-08-04 02:12:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:19,654 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 02:12:19,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298694317] [2023-08-04 02:12:19,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298694317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:19,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466671064] [2023-08-04 02:12:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:19,661 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 02:12:19,676 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 02:12:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:19,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:12:19,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:19,771 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 02:12:19,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:12:19,790 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 02:12:19,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466671064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:12:19,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:12:19,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:12:19,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131707885] [2023-08-04 02:12:19,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:12:19,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:19,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:19,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:19,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 765 [2023-08-04 02:12:19,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 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 02:12:19,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:19,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 765 [2023-08-04 02:12:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:20,205 INFO L124 PetriNetUnfolderBase]: 1432/2243 cut-off events. [2023-08-04 02:12:20,205 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 02:12:20,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2243 events. 1432/2243 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9886 event pairs, 784 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 2652. Up to 2073 conditions per place. [2023-08-04 02:12:20,216 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 02:12:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 02:12:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:12:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:12:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1279 transitions. [2023-08-04 02:12:20,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41797385620915034 [2023-08-04 02:12:20,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1279 transitions. [2023-08-04 02:12:20,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1279 transitions. [2023-08-04 02:12:20,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:20,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1279 transitions. [2023-08-04 02:12:20,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 319.75) internal successors, (1279), 4 states have internal predecessors, (1279), 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 02:12:20,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 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 02:12:20,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 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 02:12:20,231 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1279 transitions. [2023-08-04 02:12:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 02:12:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:12:20,233 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 02:12:20,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 02:12:20,235 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:12:20,235 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 02:12:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 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 02:12:20,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:20,239 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:20,245 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 02:12:20,444 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 02:12:20,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:20,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash -910914041, now seen corresponding path program 1 times [2023-08-04 02:12:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489108558] [2023-08-04 02:12:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:12:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489108558] [2023-08-04 02:12:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489108558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712732241] [2023-08-04 02:12:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:20,555 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 02:12:20,557 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 02:12:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:20,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:12:20,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:12:20,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:20,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712732241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:20,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:20,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:12:20,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628615152] [2023-08-04 02:12:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:20,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:12:20,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 765 [2023-08-04 02:12:20,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 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 02:12:20,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:20,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 765 [2023-08-04 02:12:20,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:21,084 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 02:12:21,085 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 02:12:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9702 event pairs, 344 based on Foata normal form. 0/2179 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 02:12:21,091 INFO L140 encePairwiseOnDemand]: 761/765 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 02:12:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 02:12:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:12:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:12:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1600 transitions. [2023-08-04 02:12:21,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41830065359477125 [2023-08-04 02:12:21,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1600 transitions. [2023-08-04 02:12:21,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1600 transitions. [2023-08-04 02:12:21,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:21,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1600 transitions. [2023-08-04 02:12:21,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 02:12:21,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:21,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:21,108 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1600 transitions. [2023-08-04 02:12:21,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 02:12:21,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:12:21,110 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 02:12:21,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 02:12:21,111 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-04 02:12:21,111 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 02:12:21,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.6) internal successors, (1578), 5 states have internal predecessors, (1578), 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 02:12:21,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:21,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:21,123 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 02:12:21,317 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 02:12:21,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:21,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:21,318 INFO L85 PathProgramCache]: Analyzing trace with hash 869690912, now seen corresponding path program 1 times [2023-08-04 02:12:21,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:21,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549889035] [2023-08-04 02:12:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:21,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:12:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549889035] [2023-08-04 02:12:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549889035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:12:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:12:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510346820] [2023-08-04 02:12:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:21,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:12:21,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 765 [2023-08-04 02:12:21,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 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 02:12:21,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:21,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 765 [2023-08-04 02:12:21,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:21,745 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 02:12:21,745 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:12:21,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8206 event pairs, 992 based on Foata normal form. 4/1967 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 02:12:21,752 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 02:12:21,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 02:12:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2023-08-04 02:12:21,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-08-04 02:12:21,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2023-08-04 02:12:21,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2023-08-04 02:12:21,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:21,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2023-08-04 02:12:21,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 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 02:12:21,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 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 02:12:21,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 765.0) internal successors, (3060), 4 states have internal predecessors, (3060), 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 02:12:21,762 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 969 transitions. [2023-08-04 02:12:21,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 02:12:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:21,763 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 02:12:21,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 02:12:21,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:12:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 02:12:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 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 02:12:21,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:21,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:12:21,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:21,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1841347970, now seen corresponding path program 1 times [2023-08-04 02:12:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137781640] [2023-08-04 02:12:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:12:21,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:21,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137781640] [2023-08-04 02:12:21,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137781640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:21,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127567069] [2023-08-04 02:12:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:21,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:21,829 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 02:12:21,832 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 02:12:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:21,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:12:21,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:12:21,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:12:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:12:21,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127567069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:12:21,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:12:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:12:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314046434] [2023-08-04 02:12:21,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:12:21,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:21,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 765 [2023-08-04 02:12:21,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 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 02:12:21,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:21,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 765 [2023-08-04 02:12:21,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:22,194 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 02:12:22,194 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 02:12:22,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5337 event pairs, 536 based on Foata normal form. 8/1435 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 02:12:22,198 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 02:12:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 02:12:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:12:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:12:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1283 transitions. [2023-08-04 02:12:22,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419281045751634 [2023-08-04 02:12:22,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1283 transitions. [2023-08-04 02:12:22,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1283 transitions. [2023-08-04 02:12:22,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:22,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1283 transitions. [2023-08-04 02:12:22,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 320.75) internal successors, (1283), 4 states have internal predecessors, (1283), 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 02:12:22,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 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 02:12:22,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 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 02:12:22,209 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1283 transitions. [2023-08-04 02:12:22,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 02:12:22,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:12:22,210 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 02:12:22,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:12:22,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -10 predicate places. [2023-08-04 02:12:22,211 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 02:12:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 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 02:12:22,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:22,212 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:22,217 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 02:12:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:22,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:22,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 254312827, now seen corresponding path program 1 times [2023-08-04 02:12:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522712316] [2023-08-04 02:12:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:12:22,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522712316] [2023-08-04 02:12:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522712316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925448572] [2023-08-04 02:12:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:22,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:22,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:22,479 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 02:12:22,480 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 02:12:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:22,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:12:22,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:12:22,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925448572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:22,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:12:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776832852] [2023-08-04 02:12:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:12:22,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 765 [2023-08-04 02:12:22,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 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 02:12:22,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:22,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 765 [2023-08-04 02:12:22,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:22,788 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 02:12:22,788 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 02:12:22,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3979 event pairs, 104 based on Foata normal form. 64/1203 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 02:12:22,790 INFO L140 encePairwiseOnDemand]: 762/765 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 02:12:22,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 02:12:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:12:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:12:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1604 transitions. [2023-08-04 02:12:22,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41934640522875816 [2023-08-04 02:12:22,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1604 transitions. [2023-08-04 02:12:22,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1604 transitions. [2023-08-04 02:12:22,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:22,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1604 transitions. [2023-08-04 02:12:22,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 320.8) internal successors, (1604), 5 states have internal predecessors, (1604), 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 02:12:22,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:22,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 765.0) internal successors, (4590), 6 states have internal predecessors, (4590), 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 02:12:22,802 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1604 transitions. [2023-08-04 02:12:22,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 02:12:22,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:12:22,804 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 02:12:22,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 02:12:22,805 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-04 02:12:22,805 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 02:12:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 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 02:12:22,806 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:12:22,806 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:12:22,806 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:12:22,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:12:23,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:23,012 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:23,012 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:12:23,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:23,639 INFO L124 PetriNetUnfolderBase]: 1002/5136 cut-off events. [2023-08-04 02:12:23,639 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:23,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5810 conditions, 5136 events. 1002/5136 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 45022 event pairs, 22 based on Foata normal form. 0/4378 useless extension candidates. Maximal degree in co-relation 3042. Up to 192 conditions per place. [2023-08-04 02:12:23,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:23,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:23,695 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:12:23,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:23,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:23,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 363 transitions, 816 flow [2023-08-04 02:12:24,210 INFO L124 PetriNetUnfolderBase]: 1002/5136 cut-off events. [2023-08-04 02:12:24,211 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:24,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5810 conditions, 5136 events. 1002/5136 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 45022 event pairs, 22 based on Foata normal form. 0/4378 useless extension candidates. Maximal degree in co-relation 3042. Up to 192 conditions per place. [2023-08-04 02:12:24,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 72828 [2023-08-04 02:12:31,728 INFO L134 LiptonReduction]: Checked pairs total: 90988 [2023-08-04 02:12:31,728 INFO L136 LiptonReduction]: Total number of compositions: 399 [2023-08-04 02:12:31,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:12:31,732 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;@d964556, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:12:31,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:12:31,735 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:12:31,735 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 02:12:31,735 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 02:12:31,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:31,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:31,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:31,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash 699288807, now seen corresponding path program 1 times [2023-08-04 02:12:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259103835] [2023-08-04 02:12:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:31,754 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 02:12:31,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:31,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259103835] [2023-08-04 02:12:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259103835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:31,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:12:31,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:12:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057002206] [2023-08-04 02:12:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:31,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:12:31,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:31,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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 02:12:31,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:31,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:31,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:35,299 INFO L124 PetriNetUnfolderBase]: 22847/34339 cut-off events. [2023-08-04 02:12:35,299 INFO L125 PetriNetUnfolderBase]: For 7068/7068 co-relation queries the response was YES. [2023-08-04 02:12:35,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71644 conditions, 34339 events. 22847/34339 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 219379 event pairs, 15732 based on Foata normal form. 0/31768 useless extension candidates. Maximal degree in co-relation 28978. Up to 32380 conditions per place. [2023-08-04 02:12:35,433 INFO L140 encePairwiseOnDemand]: 757/762 looper letters, 52 selfloop transitions, 2 changer transitions 3/63 dead transitions. [2023-08-04 02:12:35,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 324 flow [2023-08-04 02:12:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2023-08-04 02:12:35,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700787401574803 [2023-08-04 02:12:35,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2023-08-04 02:12:35,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2023-08-04 02:12:35,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:35,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2023-08-04 02:12:35,438 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 02:12:35,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:35,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:35,454 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 214 flow. Second operand 3 states and 999 transitions. [2023-08-04 02:12:35,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 324 flow [2023-08-04 02:12:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:12:35,463 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 204 flow [2023-08-04 02:12:35,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-04 02:12:35,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:12:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 204 flow [2023-08-04 02:12:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 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 02:12:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:12:35,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:35,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2070352287, now seen corresponding path program 1 times [2023-08-04 02:12:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460657392] [2023-08-04 02:12:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:12:35,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460657392] [2023-08-04 02:12:35,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460657392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891668848] [2023-08-04 02:12:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:35,513 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 02:12:35,516 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 02:12:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:35,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:12:35,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:12:35,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891668848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:35,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:35,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:12:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101709036] [2023-08-04 02:12:35,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:35,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:35,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:35,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 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 02:12:35,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:35,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:35,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:39,366 INFO L124 PetriNetUnfolderBase]: 22633/33891 cut-off events. [2023-08-04 02:12:39,367 INFO L125 PetriNetUnfolderBase]: For 6545/6545 co-relation queries the response was YES. [2023-08-04 02:12:39,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70683 conditions, 33891 events. 22633/33891 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 214902 event pairs, 15659 based on Foata normal form. 0/31398 useless extension candidates. Maximal degree in co-relation 70653. Up to 32006 conditions per place. [2023-08-04 02:12:39,504 INFO L140 encePairwiseOnDemand]: 759/762 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 02:12:39,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 328 flow [2023-08-04 02:12:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 999 transitions. [2023-08-04 02:12:39,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43700787401574803 [2023-08-04 02:12:39,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 999 transitions. [2023-08-04 02:12:39,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 999 transitions. [2023-08-04 02:12:39,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 999 transitions. [2023-08-04 02:12:39,509 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 02:12:39,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:39,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:39,512 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 204 flow. Second operand 3 states and 999 transitions. [2023-08-04 02:12:39,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 328 flow [2023-08-04 02:12:39,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:12:39,534 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 202 flow [2023-08-04 02:12:39,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=202, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-04 02:12:39,535 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2023-08-04 02:12:39,535 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 202 flow [2023-08-04 02:12:39,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 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 02:12:39,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:39,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:39,541 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 02:12:39,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:39,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:39,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash -803973636, now seen corresponding path program 1 times [2023-08-04 02:12:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227604807] [2023-08-04 02:12:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:12:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227604807] [2023-08-04 02:12:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227604807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104023250] [2023-08-04 02:12:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:39,775 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 02:12:39,777 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 02:12:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:39,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:12:39,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:39,855 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 02:12:39,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104023250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:39,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:39,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:12:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143158245] [2023-08-04 02:12:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:39,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:39,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:39,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 02:12:39,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:39,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:39,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:43,571 INFO L124 PetriNetUnfolderBase]: 22597/34137 cut-off events. [2023-08-04 02:12:43,571 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 02:12:43,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70896 conditions, 34137 events. 22597/34137 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 219849 event pairs, 15604 based on Foata normal form. 0/31728 useless extension candidates. Maximal degree in co-relation 30946. Up to 31630 conditions per place. [2023-08-04 02:12:43,689 INFO L140 encePairwiseOnDemand]: 759/762 looper letters, 58 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-04 02:12:43,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 336 flow [2023-08-04 02:12:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1001 transitions. [2023-08-04 02:12:43,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4378827646544182 [2023-08-04 02:12:43,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1001 transitions. [2023-08-04 02:12:43,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1001 transitions. [2023-08-04 02:12:43,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:43,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1001 transitions. [2023-08-04 02:12:43,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 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 02:12:43,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:43,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:43,697 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 202 flow. Second operand 3 states and 1001 transitions. [2023-08-04 02:12:43,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 336 flow [2023-08-04 02:12:43,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:43,701 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 212 flow [2023-08-04 02:12:43,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=212, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-04 02:12:43,702 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2023-08-04 02:12:43,702 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 212 flow [2023-08-04 02:12:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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 02:12:43,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:43,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:43,710 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 02:12:43,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:43,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:43,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1179173368, now seen corresponding path program 1 times [2023-08-04 02:12:43,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:43,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226447475] [2023-08-04 02:12:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:12:43,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:43,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226447475] [2023-08-04 02:12:43,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226447475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:43,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638042993] [2023-08-04 02:12:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:43,944 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 02:12:43,947 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 02:12:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:44,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:12:44,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:44,029 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 02:12:44,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:44,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638042993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:44,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:12:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839027567] [2023-08-04 02:12:44,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:44,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:44,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:44,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 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 02:12:44,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:44,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:44,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:47,299 INFO L124 PetriNetUnfolderBase]: 21317/32513 cut-off events. [2023-08-04 02:12:47,299 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 02:12:47,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68241 conditions, 32513 events. 21317/32513 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 212540 event pairs, 15595 based on Foata normal form. 0/30512 useless extension candidates. Maximal degree in co-relation 32430. Up to 27442 conditions per place. [2023-08-04 02:12:47,408 INFO L140 encePairwiseOnDemand]: 759/762 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:12:47,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 391 flow [2023-08-04 02:12:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1008 transitions. [2023-08-04 02:12:47,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409448818897638 [2023-08-04 02:12:47,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1008 transitions. [2023-08-04 02:12:47,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1008 transitions. [2023-08-04 02:12:47,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:47,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1008 transitions. [2023-08-04 02:12:47,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 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 02:12:47,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:47,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:47,416 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 212 flow. Second operand 3 states and 1008 transitions. [2023-08-04 02:12:47,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 391 flow [2023-08-04 02:12:47,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:47,420 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 222 flow [2023-08-04 02:12:47,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2023-08-04 02:12:47,421 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 02:12:47,421 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 222 flow [2023-08-04 02:12:47,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 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 02:12:47,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:47,421 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] [2023-08-04 02:12:47,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:12:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 02:12:47,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:47,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2084671552, now seen corresponding path program 1 times [2023-08-04 02:12:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950460910] [2023-08-04 02:12:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:47,686 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 02:12:47,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:47,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950460910] [2023-08-04 02:12:47,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950460910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:47,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094873998] [2023-08-04 02:12:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:47,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:47,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:12:47,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:12:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:47,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:12:47,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:47,785 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 02:12:47,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094873998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:47,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:47,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:12:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130772375] [2023-08-04 02:12:47,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:47,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:47,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:47,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:47,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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 02:12:47,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:47,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:51,478 INFO L124 PetriNetUnfolderBase]: 20148/31316 cut-off events. [2023-08-04 02:12:51,478 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 02:12:51,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68395 conditions, 31316 events. 20148/31316 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 206539 event pairs, 13824 based on Foata normal form. 0/30364 useless extension candidates. Maximal degree in co-relation 35320. Up to 23386 conditions per place. [2023-08-04 02:12:51,582 INFO L140 encePairwiseOnDemand]: 759/762 looper letters, 67 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 02:12:51,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 403 flow [2023-08-04 02:12:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1008 transitions. [2023-08-04 02:12:51,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409448818897638 [2023-08-04 02:12:51,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1008 transitions. [2023-08-04 02:12:51,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1008 transitions. [2023-08-04 02:12:51,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:51,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1008 transitions. [2023-08-04 02:12:51,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 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 02:12:51,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:51,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:51,589 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 222 flow. Second operand 3 states and 1008 transitions. [2023-08-04 02:12:51,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 403 flow [2023-08-04 02:12:51,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:51,602 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 232 flow [2023-08-04 02:12:51,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2023-08-04 02:12:51,603 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 02:12:51,603 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 232 flow [2023-08-04 02:12:51,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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 02:12:51,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:51,603 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] [2023-08-04 02:12:51,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:12:51,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:12:51,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:51,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash -490194627, now seen corresponding path program 1 times [2023-08-04 02:12:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348343747] [2023-08-04 02:12:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:51,883 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 02:12:51,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:51,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348343747] [2023-08-04 02:12:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348343747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:51,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067723806] [2023-08-04 02:12:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:51,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:12:51,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:12:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:51,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:12:51,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:51,991 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 02:12:51,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:12:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067723806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:12:51,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:12:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:12:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75871729] [2023-08-04 02:12:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:12:51,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:12:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:51,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:12:51,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:52,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 762 [2023-08-04 02:12:52,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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 02:12:52,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:52,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 762 [2023-08-04 02:12:52,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:55,656 INFO L124 PetriNetUnfolderBase]: 19459/30519 cut-off events. [2023-08-04 02:12:55,657 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 02:12:55,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68876 conditions, 30519 events. 19459/30519 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 199443 event pairs, 14735 based on Foata normal form. 0/30280 useless extension candidates. Maximal degree in co-relation 36596. Up to 24820 conditions per place. [2023-08-04 02:12:55,758 INFO L140 encePairwiseOnDemand]: 759/762 looper letters, 68 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 02:12:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 415 flow [2023-08-04 02:12:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:12:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:12:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1008 transitions. [2023-08-04 02:12:55,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409448818897638 [2023-08-04 02:12:55,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1008 transitions. [2023-08-04 02:12:55,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1008 transitions. [2023-08-04 02:12:55,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:55,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1008 transitions. [2023-08-04 02:12:55,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 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 02:12:55,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:55,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 762.0) internal successors, (3048), 4 states have internal predecessors, (3048), 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 02:12:55,764 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 232 flow. Second operand 3 states and 1008 transitions. [2023-08-04 02:12:55,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 415 flow [2023-08-04 02:12:55,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:55,911 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 242 flow [2023-08-04 02:12:55,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-04 02:12:55,912 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 02:12:55,912 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 242 flow [2023-08-04 02:12:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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 02:12:55,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:55,912 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] [2023-08-04 02:12:55,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:12:56,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:12:56,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:56,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1999585007, now seen corresponding path program 1 times [2023-08-04 02:12:56,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:56,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019121166] [2023-08-04 02:12:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:56,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:56,168 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 02:12:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:12:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019121166] [2023-08-04 02:12:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019121166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:12:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137541840] [2023-08-04 02:12:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:56,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:12:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:56,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:12:56,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:12:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:12:56,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:12:56,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:12:56,278 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 02:12:56,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:12:56,290 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 02:12:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137541840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:12:56,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:12:56,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:12:56,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818875069] [2023-08-04 02:12:56,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:12:56,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:12:56,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:12:56,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:12:56,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:12:56,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:12:56,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 319.8) internal successors, (1599), 5 states have internal predecessors, (1599), 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 02:12:56,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:12:56,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:12:56,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:12:59,409 INFO L124 PetriNetUnfolderBase]: 18303/28681 cut-off events. [2023-08-04 02:12:59,409 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 02:12:59,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65519 conditions, 28681 events. 18303/28681 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 188442 event pairs, 10599 based on Foata normal form. 2/28679 useless extension candidates. Maximal degree in co-relation 48888. Up to 26718 conditions per place. [2023-08-04 02:12:59,534 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 58 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2023-08-04 02:12:59,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 376 flow [2023-08-04 02:12:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:12:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:12:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1310 transitions. [2023-08-04 02:12:59,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42979002624671914 [2023-08-04 02:12:59,536 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1310 transitions. [2023-08-04 02:12:59,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1310 transitions. [2023-08-04 02:12:59,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:12:59,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1310 transitions. [2023-08-04 02:12:59,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.5) internal successors, (1310), 4 states have internal predecessors, (1310), 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 02:12:59,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:12:59,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:12:59,541 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 242 flow. Second operand 4 states and 1310 transitions. [2023-08-04 02:12:59,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 376 flow [2023-08-04 02:12:59,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:12:59,757 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 254 flow [2023-08-04 02:12:59,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-08-04 02:12:59,757 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 02:12:59,757 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 254 flow [2023-08-04 02:12:59,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 319.8) internal successors, (1599), 5 states have internal predecessors, (1599), 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 02:12:59,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:59,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:12:59,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:12:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:12:59,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:12:59,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash -235442195, now seen corresponding path program 1 times [2023-08-04 02:12:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:59,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360451374] [2023-08-04 02:12:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360451374] [2023-08-04 02:13:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360451374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:00,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445459552] [2023-08-04 02:13:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:00,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:00,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:00,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:13:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:00,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:00,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:00,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:00,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445459552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:00,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067586153] [2023-08-04 02:13:00,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:00,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:13:00,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 02:13:00,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:00,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:13:00,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:03,128 INFO L124 PetriNetUnfolderBase]: 17451/27353 cut-off events. [2023-08-04 02:13:03,128 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 02:13:03,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62354 conditions, 27353 events. 17451/27353 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 179965 event pairs, 10272 based on Foata normal form. 8/27357 useless extension candidates. Maximal degree in co-relation 45955. Up to 25374 conditions per place. [2023-08-04 02:13:03,211 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 62 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 02:13:03,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 404 flow [2023-08-04 02:13:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1314 transitions. [2023-08-04 02:13:03,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311023622047244 [2023-08-04 02:13:03,213 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1314 transitions. [2023-08-04 02:13:03,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1314 transitions. [2023-08-04 02:13:03,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:03,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1314 transitions. [2023-08-04 02:13:03,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 328.5) internal successors, (1314), 4 states have internal predecessors, (1314), 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 02:13:03,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:03,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:03,218 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 254 flow. Second operand 4 states and 1314 transitions. [2023-08-04 02:13:03,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 404 flow [2023-08-04 02:13:03,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 394 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:03,391 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 258 flow [2023-08-04 02:13:03,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-08-04 02:13:03,392 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 02:13:03,392 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 258 flow [2023-08-04 02:13:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 02:13:03,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:03,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:03,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 02:13:03,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:03,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash 465836585, now seen corresponding path program 1 times [2023-08-04 02:13:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413737355] [2023-08-04 02:13:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:03,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:03,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413737355] [2023-08-04 02:13:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413737355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:03,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850461621] [2023-08-04 02:13:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:03,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:03,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:13:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:03,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:03,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:03,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850461621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:03,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468073963] [2023-08-04 02:13:03,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:03,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:03,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:13:03,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 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 02:13:03,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:03,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:13:03,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:07,024 INFO L124 PetriNetUnfolderBase]: 17019/26681 cut-off events. [2023-08-04 02:13:07,024 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 02:13:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60166 conditions, 26681 events. 17019/26681 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 174011 event pairs, 9931 based on Foata normal form. 32/26709 useless extension candidates. Maximal degree in co-relation 43949. Up to 24046 conditions per place. [2023-08-04 02:13:07,106 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 66 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 02:13:07,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 424 flow [2023-08-04 02:13:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1318 transitions. [2023-08-04 02:13:07,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43241469816272965 [2023-08-04 02:13:07,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1318 transitions. [2023-08-04 02:13:07,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1318 transitions. [2023-08-04 02:13:07,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:07,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1318 transitions. [2023-08-04 02:13:07,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.5) internal successors, (1318), 4 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 02:13:07,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:07,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:07,115 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 258 flow. Second operand 4 states and 1318 transitions. [2023-08-04 02:13:07,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 424 flow [2023-08-04 02:13:07,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 414 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:07,226 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 262 flow [2023-08-04 02:13:07,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-08-04 02:13:07,226 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 02:13:07,227 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 262 flow [2023-08-04 02:13:07,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.2) internal successors, (1601), 5 states have internal predecessors, (1601), 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 02:13:07,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:07,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:07,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 02:13:07,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:07,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1625382696, now seen corresponding path program 1 times [2023-08-04 02:13:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647955571] [2023-08-04 02:13:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:07,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:07,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647955571] [2023-08-04 02:13:07,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647955571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955147121] [2023-08-04 02:13:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:07,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:07,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:07,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:07,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:13:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:07,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:07,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:07,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955147121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:07,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112455988] [2023-08-04 02:13:07,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:07,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:13:07,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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 02:13:07,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:07,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:13:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:09,501 INFO L124 PetriNetUnfolderBase]: 10447/16661 cut-off events. [2023-08-04 02:13:09,501 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 02:13:09,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37483 conditions, 16661 events. 10447/16661 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 101036 event pairs, 5506 based on Foata normal form. 192/16849 useless extension candidates. Maximal degree in co-relation 32048. Up to 9703 conditions per place. [2023-08-04 02:13:09,556 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 73 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 02:13:09,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 469 flow [2023-08-04 02:13:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2023-08-04 02:13:09,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43471128608923887 [2023-08-04 02:13:09,560 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2023-08-04 02:13:09,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2023-08-04 02:13:09,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:09,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2023-08-04 02:13:09,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 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 02:13:09,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:09,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:09,564 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 262 flow. Second operand 4 states and 1325 transitions. [2023-08-04 02:13:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 469 flow [2023-08-04 02:13:09,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 458 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:09,629 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 272 flow [2023-08-04 02:13:09,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-08-04 02:13:09,630 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-08-04 02:13:09,630 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 272 flow [2023-08-04 02:13:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.4) internal successors, (1602), 5 states have internal predecessors, (1602), 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 02:13:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:09,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:09,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:09,833 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:09,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1033718823, now seen corresponding path program 1 times [2023-08-04 02:13:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293728113] [2023-08-04 02:13:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:09,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:09,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293728113] [2023-08-04 02:13:09,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293728113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161815342] [2023-08-04 02:13:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:09,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:09,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:09,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 02:13:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:10,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:10,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:10,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:10,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161815342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:10,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:10,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:10,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968434740] [2023-08-04 02:13:10,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:10,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:10,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:10,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:13:10,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 320.8) internal successors, (1604), 5 states have internal predecessors, (1604), 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 02:13:10,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:10,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:13:10,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:11,773 INFO L124 PetriNetUnfolderBase]: 9427/14950 cut-off events. [2023-08-04 02:13:11,773 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 02:13:11,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35841 conditions, 14950 events. 9427/14950 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88264 event pairs, 5954 based on Foata normal form. 233/15179 useless extension candidates. Maximal degree in co-relation 34698. Up to 8770 conditions per place. [2023-08-04 02:13:11,838 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 74 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-04 02:13:11,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 480 flow [2023-08-04 02:13:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2023-08-04 02:13:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43471128608923887 [2023-08-04 02:13:11,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2023-08-04 02:13:11,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2023-08-04 02:13:11,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:11,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2023-08-04 02:13:11,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 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 02:13:11,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:11,845 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:11,845 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 272 flow. Second operand 4 states and 1325 transitions. [2023-08-04 02:13:11,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 480 flow [2023-08-04 02:13:11,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 476 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:11,909 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 288 flow [2023-08-04 02:13:11,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-04 02:13:11,909 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2023-08-04 02:13:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 288 flow [2023-08-04 02:13:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 320.8) internal successors, (1604), 5 states have internal predecessors, (1604), 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 02:13:11,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:11,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:12,110 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:12,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1743206481, now seen corresponding path program 1 times [2023-08-04 02:13:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909479515] [2023-08-04 02:13:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:12,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909479515] [2023-08-04 02:13:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909479515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139269372] [2023-08-04 02:13:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:12,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:12,194 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:12,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 02:13:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:12,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:12,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:12,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139269372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:12,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950588806] [2023-08-04 02:13:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:12,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 762 [2023-08-04 02:13:12,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 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 02:13:12,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:12,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 762 [2023-08-04 02:13:12,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:13,822 INFO L124 PetriNetUnfolderBase]: 9409/14897 cut-off events. [2023-08-04 02:13:13,822 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 02:13:13,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37438 conditions, 14897 events. 9409/14897 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87881 event pairs, 8414 based on Foata normal form. 13/14906 useless extension candidates. Maximal degree in co-relation 36338. Up to 13455 conditions per place. [2023-08-04 02:13:13,877 INFO L140 encePairwiseOnDemand]: 758/762 looper letters, 73 selfloop transitions, 3 changer transitions 3/85 dead transitions. [2023-08-04 02:13:13,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 85 transitions, 498 flow [2023-08-04 02:13:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1325 transitions. [2023-08-04 02:13:13,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43471128608923887 [2023-08-04 02:13:13,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1325 transitions. [2023-08-04 02:13:13,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1325 transitions. [2023-08-04 02:13:13,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:13,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1325 transitions. [2023-08-04 02:13:13,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.25) internal successors, (1325), 4 states have internal predecessors, (1325), 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 02:13:13,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:13,883 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 762.0) internal successors, (3810), 5 states have internal predecessors, (3810), 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 02:13:13,884 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 288 flow. Second operand 4 states and 1325 transitions. [2023-08-04 02:13:13,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 85 transitions, 498 flow [2023-08-04 02:13:14,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:14,007 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 286 flow [2023-08-04 02:13:14,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-08-04 02:13:14,007 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2023-08-04 02:13:14,008 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 286 flow [2023-08-04 02:13:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.2) internal successors, (1606), 5 states have internal predecessors, (1606), 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 02:13:14,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:14,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:14,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:14,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:14,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:14,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash 7837341, now seen corresponding path program 1 times [2023-08-04 02:13:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129933527] [2023-08-04 02:13:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:16,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:16,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129933527] [2023-08-04 02:13:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129933527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:16,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522470816] [2023-08-04 02:13:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:16,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:16,391 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:16,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 02:13:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:16,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 02:13:16,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:20,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:13:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522470816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:22,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-04 02:13:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434766143] [2023-08-04 02:13:22,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:13:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:13:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:13:23,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 762 [2023-08-04 02:13:23,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 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 02:13:23,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:23,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 762 [2023-08-04 02:13:23,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:27,619 INFO L124 PetriNetUnfolderBase]: 15094/24042 cut-off events. [2023-08-04 02:13:27,619 INFO L125 PetriNetUnfolderBase]: For 16373/16373 co-relation queries the response was YES. [2023-08-04 02:13:27,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60055 conditions, 24042 events. 15094/24042 cut-off events. For 16373/16373 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 163010 event pairs, 1432 based on Foata normal form. 2/23909 useless extension candidates. Maximal degree in co-relation 59942. Up to 6571 conditions per place. [2023-08-04 02:13:27,698 INFO L140 encePairwiseOnDemand]: 752/762 looper letters, 162 selfloop transitions, 13 changer transitions 95/276 dead transitions. [2023-08-04 02:13:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 276 transitions, 1833 flow [2023-08-04 02:13:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 02:13:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 02:13:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3543 transitions. [2023-08-04 02:13:27,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38746719160104987 [2023-08-04 02:13:27,705 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3543 transitions. [2023-08-04 02:13:27,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3543 transitions. [2023-08-04 02:13:27,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:27,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3543 transitions. [2023-08-04 02:13:27,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 295.25) internal successors, (3543), 12 states have internal predecessors, (3543), 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 02:13:27,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 762.0) internal successors, (9906), 13 states have internal predecessors, (9906), 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 02:13:27,717 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 762.0) internal successors, (9906), 13 states have internal predecessors, (9906), 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 02:13:27,717 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 286 flow. Second operand 12 states and 3543 transitions. [2023-08-04 02:13:27,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 276 transitions, 1833 flow [2023-08-04 02:13:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 276 transitions, 1783 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 02:13:28,033 INFO L231 Difference]: Finished difference. Result has 98 places, 75 transitions, 404 flow [2023-08-04 02:13:28,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=404, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2023-08-04 02:13:28,033 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2023-08-04 02:13:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 404 flow [2023-08-04 02:13:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 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 02:13:28,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:28,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:28,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:28,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:28,235 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:28,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1022390625, now seen corresponding path program 2 times [2023-08-04 02:13:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228473479] [2023-08-04 02:13:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:29,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228473479] [2023-08-04 02:13:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228473479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442434795] [2023-08-04 02:13:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:13:29,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:29,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:30,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 02:13:30,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:13:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:13:30,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 02:13:30,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:31,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442434795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:33,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:33,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-08-04 02:13:33,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464949671] [2023-08-04 02:13:33,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:33,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 02:13:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 02:13:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-04 02:13:34,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 762 [2023-08-04 02:13:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 404 flow. Second operand has 14 states, 14 states have (on average 284.2142857142857) internal successors, (3979), 14 states have internal predecessors, (3979), 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 02:13:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 762 [2023-08-04 02:13:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:38,066 INFO L124 PetriNetUnfolderBase]: 15274/25602 cut-off events. [2023-08-04 02:13:38,066 INFO L125 PetriNetUnfolderBase]: For 77683/77683 co-relation queries the response was YES. [2023-08-04 02:13:38,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97797 conditions, 25602 events. 15274/25602 cut-off events. For 77683/77683 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 188933 event pairs, 2488 based on Foata normal form. 1/25491 useless extension candidates. Maximal degree in co-relation 97757. Up to 10926 conditions per place. [2023-08-04 02:13:38,223 INFO L140 encePairwiseOnDemand]: 752/762 looper letters, 138 selfloop transitions, 9 changer transitions 75/228 dead transitions. [2023-08-04 02:13:38,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 228 transitions, 1689 flow [2023-08-04 02:13:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:13:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:13:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2708 transitions. [2023-08-04 02:13:38,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39486730825313504 [2023-08-04 02:13:38,228 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2708 transitions. [2023-08-04 02:13:38,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2708 transitions. [2023-08-04 02:13:38,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:38,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2708 transitions. [2023-08-04 02:13:38,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 300.8888888888889) internal successors, (2708), 9 states have internal predecessors, (2708), 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 02:13:38,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 762.0) internal successors, (7620), 10 states have internal predecessors, (7620), 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 02:13:38,235 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 762.0) internal successors, (7620), 10 states have internal predecessors, (7620), 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 02:13:38,235 INFO L175 Difference]: Start difference. First operand has 98 places, 75 transitions, 404 flow. Second operand 9 states and 2708 transitions. [2023-08-04 02:13:38,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 228 transitions, 1689 flow [2023-08-04 02:13:38,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 228 transitions, 1669 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 02:13:38,762 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 430 flow [2023-08-04 02:13:38,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=430, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2023-08-04 02:13:38,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2023-08-04 02:13:38,763 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 430 flow [2023-08-04 02:13:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 284.2142857142857) internal successors, (3979), 14 states have internal predecessors, (3979), 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 02:13:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:38,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:38,964 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:38,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1260203579, now seen corresponding path program 1 times [2023-08-04 02:13:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:38,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981604789] [2023-08-04 02:13:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:13:39,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:39,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981604789] [2023-08-04 02:13:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981604789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:39,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515431955] [2023-08-04 02:13:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:39,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:39,805 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:39,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 02:13:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:39,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 02:13:39,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:13:42,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:13:43,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515431955] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:43,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:43,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 22 [2023-08-04 02:13:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11387490] [2023-08-04 02:13:43,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:43,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-04 02:13:43,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-04 02:13:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-04 02:13:45,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 762 [2023-08-04 02:13:45,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 430 flow. Second operand has 22 states, 22 states have (on average 264.45454545454544) internal successors, (5818), 22 states have internal predecessors, (5818), 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 02:13:45,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:45,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 762 [2023-08-04 02:13:45,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:54,411 INFO L124 PetriNetUnfolderBase]: 18310/32072 cut-off events. [2023-08-04 02:13:54,412 INFO L125 PetriNetUnfolderBase]: For 140526/140526 co-relation queries the response was YES. [2023-08-04 02:13:54,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132399 conditions, 32072 events. 18310/32072 cut-off events. For 140526/140526 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 261893 event pairs, 2456 based on Foata normal form. 409/32387 useless extension candidates. Maximal degree in co-relation 132357. Up to 11075 conditions per place. [2023-08-04 02:13:54,611 INFO L140 encePairwiseOnDemand]: 740/762 looper letters, 259 selfloop transitions, 89 changer transitions 27/379 dead transitions. [2023-08-04 02:13:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 379 transitions, 3188 flow [2023-08-04 02:13:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-04 02:13:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-04 02:13:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8346 transitions. [2023-08-04 02:13:54,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533147066294133 [2023-08-04 02:13:54,620 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8346 transitions. [2023-08-04 02:13:54,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8346 transitions. [2023-08-04 02:13:54,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:54,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8346 transitions. [2023-08-04 02:13:54,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 269.2258064516129) internal successors, (8346), 31 states have internal predecessors, (8346), 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 02:13:54,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 762.0) internal successors, (24384), 32 states have internal predecessors, (24384), 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 02:13:54,645 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 762.0) internal successors, (24384), 32 states have internal predecessors, (24384), 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 02:13:54,645 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 430 flow. Second operand 31 states and 8346 transitions. [2023-08-04 02:13:54,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 379 transitions, 3188 flow [2023-08-04 02:13:55,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 379 transitions, 2972 flow, removed 89 selfloop flow, removed 6 redundant places. [2023-08-04 02:13:55,407 INFO L231 Difference]: Finished difference. Result has 137 places, 152 transitions, 1400 flow [2023-08-04 02:13:55,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1400, PETRI_PLACES=137, PETRI_TRANSITIONS=152} [2023-08-04 02:13:55,407 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2023-08-04 02:13:55,407 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 152 transitions, 1400 flow [2023-08-04 02:13:55,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 264.45454545454544) internal successors, (5818), 22 states have internal predecessors, (5818), 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 02:13:55,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:55,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:55,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:55,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:55,609 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:55,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1005002749, now seen corresponding path program 1 times [2023-08-04 02:13:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:55,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803590809] [2023-08-04 02:13:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:55,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:13:57,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803590809] [2023-08-04 02:13:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803590809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029253917] [2023-08-04 02:13:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:57,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:57,417 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:57,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 02:13:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:57,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 02:13:57,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:13:59,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:14:01,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029253917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:01,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:01,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-04 02:14:01,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777807877] [2023-08-04 02:14:01,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 02:14:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 02:14:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-08-04 02:14:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 762 [2023-08-04 02:14:02,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 152 transitions, 1400 flow. Second operand has 15 states, 15 states have (on average 281.2) internal successors, (4218), 15 states have internal predecessors, (4218), 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 02:14:02,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:02,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 762 [2023-08-04 02:14:02,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:07,983 INFO L124 PetriNetUnfolderBase]: 18526/33767 cut-off events. [2023-08-04 02:14:07,984 INFO L125 PetriNetUnfolderBase]: For 347671/347690 co-relation queries the response was YES. [2023-08-04 02:14:08,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191366 conditions, 33767 events. 18526/33767 cut-off events. For 347671/347690 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 292895 event pairs, 3451 based on Foata normal form. 15/33649 useless extension candidates. Maximal degree in co-relation 191314. Up to 18072 conditions per place. [2023-08-04 02:14:08,281 INFO L140 encePairwiseOnDemand]: 752/762 looper letters, 128 selfloop transitions, 19 changer transitions 120/276 dead transitions. [2023-08-04 02:14:08,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 276 transitions, 2759 flow [2023-08-04 02:14:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:14:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:14:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2371 transitions. [2023-08-04 02:14:08,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38894356955380577 [2023-08-04 02:14:08,283 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2371 transitions. [2023-08-04 02:14:08,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2371 transitions. [2023-08-04 02:14:08,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:08,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2371 transitions. [2023-08-04 02:14:08,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 296.375) internal successors, (2371), 8 states have internal predecessors, (2371), 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 02:14:08,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 762.0) internal successors, (6858), 9 states have internal predecessors, (6858), 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 02:14:08,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 762.0) internal successors, (6858), 9 states have internal predecessors, (6858), 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 02:14:08,290 INFO L175 Difference]: Start difference. First operand has 137 places, 152 transitions, 1400 flow. Second operand 8 states and 2371 transitions. [2023-08-04 02:14:08,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 276 transitions, 2759 flow [2023-08-04 02:14:11,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 276 transitions, 2554 flow, removed 76 selfloop flow, removed 11 redundant places. [2023-08-04 02:14:11,136 INFO L231 Difference]: Finished difference. Result has 135 places, 94 transitions, 761 flow [2023-08-04 02:14:11,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=761, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2023-08-04 02:14:11,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2023-08-04 02:14:11,136 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 761 flow [2023-08-04 02:14:11,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 281.2) internal successors, (4218), 15 states have internal predecessors, (4218), 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 02:14:11,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:11,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:11,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 02:14:11,337 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:11,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 786478405, now seen corresponding path program 1 times [2023-08-04 02:14:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:11,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83215371] [2023-08-04 02:14:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:14:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83215371] [2023-08-04 02:14:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83215371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563123448] [2023-08-04 02:14:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:12,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:12,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:12,393 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:12,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 02:14:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:12,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 02:14:12,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:14,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:15,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563123448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:15,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:15,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2023-08-04 02:14:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608129839] [2023-08-04 02:14:15,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:15,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-04 02:14:15,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-04 02:14:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-08-04 02:14:17,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 762 [2023-08-04 02:14:17,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 761 flow. Second operand has 23 states, 23 states have (on average 273.0869565217391) internal successors, (6281), 23 states have internal predecessors, (6281), 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 02:14:17,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:17,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 762 [2023-08-04 02:14:17,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:24,414 INFO L124 PetriNetUnfolderBase]: 7862/14992 cut-off events. [2023-08-04 02:14:24,414 INFO L125 PetriNetUnfolderBase]: For 179014/179021 co-relation queries the response was YES. [2023-08-04 02:14:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88716 conditions, 14992 events. 7862/14992 cut-off events. For 179014/179021 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 121132 event pairs, 876 based on Foata normal form. 46/14957 useless extension candidates. Maximal degree in co-relation 88669. Up to 6354 conditions per place. [2023-08-04 02:14:24,493 INFO L140 encePairwiseOnDemand]: 739/762 looper letters, 121 selfloop transitions, 83 changer transitions 50/260 dead transitions. [2023-08-04 02:14:24,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 260 transitions, 3085 flow [2023-08-04 02:14:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-04 02:14:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-04 02:14:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8506 transitions. [2023-08-04 02:14:24,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36008805350944034 [2023-08-04 02:14:24,502 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8506 transitions. [2023-08-04 02:14:24,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8506 transitions. [2023-08-04 02:14:24,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:24,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8506 transitions. [2023-08-04 02:14:24,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 274.38709677419354) internal successors, (8506), 31 states have internal predecessors, (8506), 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 02:14:24,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 762.0) internal successors, (24384), 32 states have internal predecessors, (24384), 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 02:14:24,528 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 762.0) internal successors, (24384), 32 states have internal predecessors, (24384), 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 02:14:24,528 INFO L175 Difference]: Start difference. First operand has 135 places, 94 transitions, 761 flow. Second operand 31 states and 8506 transitions. [2023-08-04 02:14:24,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 260 transitions, 3085 flow [2023-08-04 02:14:25,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 260 transitions, 2599 flow, removed 213 selfloop flow, removed 15 redundant places. [2023-08-04 02:14:25,561 INFO L231 Difference]: Finished difference. Result has 148 places, 144 transitions, 1463 flow [2023-08-04 02:14:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1463, PETRI_PLACES=148, PETRI_TRANSITIONS=144} [2023-08-04 02:14:25,561 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2023-08-04 02:14:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 144 transitions, 1463 flow [2023-08-04 02:14:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 273.0869565217391) internal successors, (6281), 23 states have internal predecessors, (6281), 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 02:14:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:25,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:25,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 02:14:25,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:25,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash 337376353, now seen corresponding path program 1 times [2023-08-04 02:14:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:25,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138853986] [2023-08-04 02:14:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:25,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:14:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:26,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138853986] [2023-08-04 02:14:26,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138853986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304523137] [2023-08-04 02:14:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:26,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:26,552 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:26,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 02:14:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:26,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 02:14:26,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:14:28,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 02:14:29,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304523137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:29,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:29,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 22 [2023-08-04 02:14:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309078005] [2023-08-04 02:14:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:29,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-04 02:14:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-04 02:14:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2023-08-04 02:14:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 762 [2023-08-04 02:14:32,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 144 transitions, 1463 flow. Second operand has 22 states, 22 states have (on average 270.27272727272725) internal successors, (5946), 22 states have internal predecessors, (5946), 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 02:14:32,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:32,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 762 [2023-08-04 02:14:32,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:38,043 INFO L124 PetriNetUnfolderBase]: 7890/15236 cut-off events. [2023-08-04 02:14:38,043 INFO L125 PetriNetUnfolderBase]: For 216512/216512 co-relation queries the response was YES. [2023-08-04 02:14:38,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96470 conditions, 15236 events. 7890/15236 cut-off events. For 216512/216512 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 123497 event pairs, 952 based on Foata normal form. 64/15300 useless extension candidates. Maximal degree in co-relation 96429. Up to 6272 conditions per place. [2023-08-04 02:14:38,116 INFO L140 encePairwiseOnDemand]: 741/762 looper letters, 0 selfloop transitions, 0 changer transitions 283/283 dead transitions. [2023-08-04 02:14:38,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 283 transitions, 3327 flow [2023-08-04 02:14:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-04 02:14:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-04 02:14:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7082 transitions. [2023-08-04 02:14:38,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574601251766606 [2023-08-04 02:14:38,124 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7082 transitions. [2023-08-04 02:14:38,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7082 transitions. [2023-08-04 02:14:38,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:38,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7082 transitions. [2023-08-04 02:14:38,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 272.38461538461536) internal successors, (7082), 26 states have internal predecessors, (7082), 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 02:14:38,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 762.0) internal successors, (20574), 27 states have internal predecessors, (20574), 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 02:14:38,145 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 762.0) internal successors, (20574), 27 states have internal predecessors, (20574), 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 02:14:38,145 INFO L175 Difference]: Start difference. First operand has 148 places, 144 transitions, 1463 flow. Second operand 26 states and 7082 transitions. [2023-08-04 02:14:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 283 transitions, 3327 flow [2023-08-04 02:14:39,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 283 transitions, 3062 flow, removed 105 selfloop flow, removed 19 redundant places. [2023-08-04 02:14:39,014 INFO L231 Difference]: Finished difference. Result has 149 places, 0 transitions, 0 flow [2023-08-04 02:14:39,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=762, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=149, PETRI_TRANSITIONS=0} [2023-08-04 02:14:39,015 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2023-08-04 02:14:39,015 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 0 transitions, 0 flow [2023-08-04 02:14:39,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 270.27272727272725) internal successors, (5946), 22 states have internal predecessors, (5946), 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 02:14:39,016 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:14:39,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 02:14:39,216 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:39,217 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:14:39,217 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:14:39,217 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:14:39,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:14:39 BasicIcfg [2023-08-04 02:14:39,221 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:14:39,221 INFO L158 Benchmark]: Toolchain (without parser) took 162862.36ms. Allocated memory was 362.8MB in the beginning and 11.5GB in the end (delta: 11.2GB). Free memory was 308.0MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2023-08-04 02:14:39,221 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 362.8MB. Free memory was 316.2MB in the beginning and 316.1MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:14:39,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.14ms. Allocated memory is still 362.8MB. Free memory was 307.7MB in the beginning and 296.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 02:14:39,222 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.68ms. Allocated memory is still 362.8MB. Free memory was 296.1MB in the beginning and 293.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:14:39,222 INFO L158 Benchmark]: Boogie Preprocessor took 32.00ms. Allocated memory is still 362.8MB. Free memory was 293.6MB in the beginning and 292.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:14:39,222 INFO L158 Benchmark]: RCFGBuilder took 471.25ms. Allocated memory was 362.8MB in the beginning and 539.0MB in the end (delta: 176.2MB). Free memory was 291.8MB in the beginning and 500.1MB in the end (delta: -208.3MB). Peak memory consumption was 18.4MB. Max. memory is 16.0GB. [2023-08-04 02:14:39,223 INFO L158 Benchmark]: TraceAbstraction took 162106.42ms. Allocated memory was 539.0MB in the beginning and 11.5GB in the end (delta: 11.0GB). Free memory was 499.2MB in the beginning and 4.6GB in the end (delta: -4.1GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2023-08-04 02:14:39,224 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 362.8MB. Free memory was 316.2MB in the beginning and 316.1MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 207.14ms. Allocated memory is still 362.8MB. Free memory was 307.7MB in the beginning and 296.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.68ms. Allocated memory is still 362.8MB. Free memory was 296.1MB in the beginning and 293.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.00ms. Allocated memory is still 362.8MB. Free memory was 293.6MB in the beginning and 292.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 471.25ms. Allocated memory was 362.8MB in the beginning and 539.0MB in the end (delta: 176.2MB). Free memory was 291.8MB in the beginning and 500.1MB in the end (delta: -208.3MB). Peak memory consumption was 18.4MB. Max. memory is 16.0GB. * TraceAbstraction took 162106.42ms. Allocated memory was 539.0MB in the beginning and 11.5GB in the end (delta: 11.0GB). Free memory was 499.2MB in the beginning and 4.6GB in the end (delta: -4.1GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.1s, 227 PlacesBefore, 41 PlacesAfterwards, 249 TransitionsBefore, 44 TransitionsAfterwards, 23868 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 136 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 64 ConcurrentYvCompositions, 19 ChoiceCompositions, 264 TotalNumberOfCompositions, 25911 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 25216, independent: 25177, independent conditional: 0, independent unconditional: 25177, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 14257, independent: 14233, independent conditional: 0, independent unconditional: 14233, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 25216, independent: 10944, independent conditional: 0, independent unconditional: 10944, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 14257, unknown conditional: 0, unknown unconditional: 14257] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.7s, 326 PlacesBefore, 56 PlacesAfterwards, 363 TransitionsBefore, 62 TransitionsAfterwards, 72828 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 218 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 108 ConcurrentYvCompositions, 31 ChoiceCompositions, 402 TotalNumberOfCompositions, 89862 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 86346, independent: 86280, independent conditional: 0, independent unconditional: 86280, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 43749, independent: 43712, independent conditional: 0, independent unconditional: 43712, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 86346, independent: 42568, independent conditional: 0, independent unconditional: 42568, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 43749, unknown conditional: 0, unknown unconditional: 43749] , Statistics on independence cache: Total cache size (in pairs): 199, Positive cache size: 194, Positive conditional cache size: 0, Positive unconditional cache size: 194, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.0s, 326 PlacesBefore, 56 PlacesAfterwards, 363 TransitionsBefore, 62 TransitionsAfterwards, 72828 CoEnabledTransitionPairs, 8 FixpointIterations, 45 TrivialSequentialCompositions, 215 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 108 ConcurrentYvCompositions, 31 ChoiceCompositions, 399 TotalNumberOfCompositions, 90988 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 86978, independent: 86898, independent conditional: 0, independent unconditional: 86898, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 43449, independent: 43409, independent conditional: 0, independent unconditional: 43409, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 86978, independent: 43489, independent conditional: 0, independent unconditional: 43489, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 43449, unknown conditional: 0, unknown unconditional: 43449] , Statistics on independence cache: Total cache size (in pairs): 194, Positive cache size: 189, Positive conditional cache size: 0, Positive unconditional cache size: 189, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 81]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 314 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.6s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 407 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 308 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 256 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 507 IncrementalHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 10 mSDtfsCounter, 507 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 728 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 407 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 136.2s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 89.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8838 SdHoareTripleChecker+Valid, 15.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8092 mSDsluCounter, 34178 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 34029 mSDsCounter, 293 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26090 IncrementalHoareTripleChecker+Invalid, 26383 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 293 mSolverCounterUnsat, 149 mSDtfsCounter, 26090 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1639 GetRequests, 1372 SyntacticMatches, 33 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 16.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1463occurred in iteration=17, InterpolantAutomatonStates: 159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 31.5s InterpolantComputationTime, 1538 NumberOfCodeBlocks, 1538 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2148 ConstructedInterpolants, 0 QuantifiedInterpolants, 42451 SizeOfPredicates, 384 NumberOfNonLiveVariables, 3332 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 47 InterpolantComputations, 6 PerfectInterpolantSequences, 817/948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:14:39,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...