/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:15:05,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:15:06,050 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:15:06,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:15:06,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:15:06,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:15:06,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:15:06,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:15:06,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:15:06,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:15:06,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:15:06,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:15:06,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:15:06,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:15:06,097 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:15:06,098 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:15:06,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:15:06,098 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:15:06,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:15:06,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:15:06,099 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:15:06,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:15:06,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:15:06,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:15:06,109 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:15:06,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:15:06,110 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:15:06,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:15:06,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:15:06,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:15:06,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:15:06,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:15:06,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:15:06,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:15:06,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:15:06,113 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:15:06,114 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:15:06,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:15:06,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:15:06,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:15:06,348 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:15:06,349 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:15:06,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-subst.wvr_bound2.c [2023-08-04 08:15:07,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:15:07,676 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:15:07,676 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-subst.wvr_bound2.c [2023-08-04 08:15:07,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f92dd20/a988ce74943b4db68231615410f15ef6/FLAGa699444e0 [2023-08-04 08:15:07,693 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8f92dd20/a988ce74943b4db68231615410f15ef6 [2023-08-04 08:15:07,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:15:07,697 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:15:07,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:15:07,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:15:07,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:15:07,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4775cebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07, skipping insertion in model container [2023-08-04 08:15:07,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,739 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:15:07,870 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-array-int-subst.wvr_bound2.c[3024,3037] [2023-08-04 08:15:07,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:15:07,886 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:15:07,909 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-array-int-subst.wvr_bound2.c[3024,3037] [2023-08-04 08:15:07,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:15:07,927 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:15:07,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07 WrapperNode [2023-08-04 08:15:07,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:15:07,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:15:07,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:15:07,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:15:07,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,971 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 335 [2023-08-04 08:15:07,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:15:07,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:15:07,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:15:07,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:15:07,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:07,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:08,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:08,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:08,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:15:08,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:15:08,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:15:08,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:15:08,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (1/1) ... [2023-08-04 08:15:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:15:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:08,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:15:08,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:15:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:15:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:15:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:15:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:15:08,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:15:08,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:15:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:15:08,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:15:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:15:08,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:15:08,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:15:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:15:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:15:08,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:15:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:15:08,117 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:15:08,253 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:15:08,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:15:08,728 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:15:08,738 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:15:08,739 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:15:08,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:15:08 BoogieIcfgContainer [2023-08-04 08:15:08,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:15:08,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:15:08,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:15:08,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:15:08,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:15:07" (1/3) ... [2023-08-04 08:15:08,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:15:08, skipping insertion in model container [2023-08-04 08:15:08,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:15:07" (2/3) ... [2023-08-04 08:15:08,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:15:08, skipping insertion in model container [2023-08-04 08:15:08,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:15:08" (3/3) ... [2023-08-04 08:15:08,754 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-array-int-subst.wvr_bound2.c [2023-08-04 08:15:08,763 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:15:08,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:15:08,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:15:08,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:15:08,912 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:15:08,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,255 INFO L124 PetriNetUnfolderBase]: 137/1018 cut-off events. [2023-08-04 08:15:09,256 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:15:09,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1018 events. 137/1018 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5757 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 08:15:09,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:09,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:09,459 INFO L124 PetriNetUnfolderBase]: 137/1018 cut-off events. [2023-08-04 08:15:09,459 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:15:09,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1018 events. 137/1018 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5757 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 08:15:09,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 33528 [2023-08-04 08:15:18,887 INFO L134 LiptonReduction]: Checked pairs total: 50457 [2023-08-04 08:15:18,888 INFO L136 LiptonReduction]: Total number of compositions: 391 [2023-08-04 08:15:18,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:15:18,906 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;@66a1462e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:18,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:15:18,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:18,914 INFO L124 PetriNetUnfolderBase]: 7/57 cut-off events. [2023-08-04 08:15:18,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:18,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:18,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:18,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:18,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1428490180, now seen corresponding path program 1 times [2023-08-04 08:15:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:18,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718811834] [2023-08-04 08:15:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:18,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:15:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718811834] [2023-08-04 08:15:19,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718811834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:19,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:15:19,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:15:19,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886912282] [2023-08-04 08:15:19,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:19,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:15:19,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:19,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 71 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:19,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:19,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:21,396 INFO L124 PetriNetUnfolderBase]: 19515/26590 cut-off events. [2023-08-04 08:15:21,396 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2023-08-04 08:15:21,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53446 conditions, 26590 events. 19515/26590 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 136019 event pairs, 9174 based on Foata normal form. 0/19662 useless extension candidates. Maximal degree in co-relation 48079. Up to 26095 conditions per place. [2023-08-04 08:15:21,560 INFO L140 encePairwiseOnDemand]: 758/763 looper letters, 69 selfloop transitions, 2 changer transitions 4/78 dead transitions. [2023-08-04 08:15:21,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 342 flow [2023-08-04 08:15:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:21,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-08-04 08:15:21,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639580602883355 [2023-08-04 08:15:21,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-08-04 08:15:21,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-08-04 08:15:21,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:21,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-08-04 08:15:21,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:21,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:21,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:21,607 INFO L175 Difference]: Start difference. First operand has 59 places, 71 transitions, 184 flow. Second operand 3 states and 1062 transitions. [2023-08-04 08:15:21,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 342 flow [2023-08-04 08:15:21,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:15:21,618 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 176 flow [2023-08-04 08:15:21,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-08-04 08:15:21,623 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 08:15:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 176 flow [2023-08-04 08:15:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:21,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:21,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:15:21,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:21,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash -524132848, now seen corresponding path program 1 times [2023-08-04 08:15:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132079069] [2023-08-04 08:15:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:21,769 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 08:15:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132079069] [2023-08-04 08:15:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132079069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914074420] [2023-08-04 08:15:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:21,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:21,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:21,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:15:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:21,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:21,916 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 08:15:21,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:21,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914074420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:21,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010408262] [2023-08-04 08:15:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:21,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:21,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:21,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:21,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:21,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:21,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:21,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:21,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:23,782 INFO L124 PetriNetUnfolderBase]: 19149/25995 cut-off events. [2023-08-04 08:15:23,782 INFO L125 PetriNetUnfolderBase]: For 1016/1016 co-relation queries the response was YES. [2023-08-04 08:15:23,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52292 conditions, 25995 events. 19149/25995 cut-off events. For 1016/1016 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 132276 event pairs, 9110 based on Foata normal form. 0/19213 useless extension candidates. Maximal degree in co-relation 46920. Up to 25430 conditions per place. [2023-08-04 08:15:23,909 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 77 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2023-08-04 08:15:23,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 370 flow [2023-08-04 08:15:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1068 transitions. [2023-08-04 08:15:23,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46657929226736566 [2023-08-04 08:15:23,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1068 transitions. [2023-08-04 08:15:23,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1068 transitions. [2023-08-04 08:15:23,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:23,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1068 transitions. [2023-08-04 08:15:23,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:23,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:23,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:23,931 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 176 flow. Second operand 3 states and 1068 transitions. [2023-08-04 08:15:23,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 370 flow [2023-08-04 08:15:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 354 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:15:23,941 INFO L231 Difference]: Finished difference. Result has 56 places, 66 transitions, 168 flow [2023-08-04 08:15:23,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=56, PETRI_TRANSITIONS=66} [2023-08-04 08:15:23,943 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-08-04 08:15:23,943 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 66 transitions, 168 flow [2023-08-04 08:15:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:23,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:23,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:23,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:24,149 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 08:15:24,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:24,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1820251163, now seen corresponding path program 1 times [2023-08-04 08:15:24,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:24,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850436832] [2023-08-04 08:15:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:24,263 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 08:15:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850436832] [2023-08-04 08:15:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850436832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452436140] [2023-08-04 08:15:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:24,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:24,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:24,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:15:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:24,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:24,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:15:24,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452436140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:24,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896681044] [2023-08-04 08:15:24,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:24,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:24,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:24,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 66 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:24,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:24,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:24,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:26,134 INFO L124 PetriNetUnfolderBase]: 19100/26036 cut-off events. [2023-08-04 08:15:26,134 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-08-04 08:15:26,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52374 conditions, 26036 events. 19100/26036 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136392 event pairs, 8885 based on Foata normal form. 0/19397 useless extension candidates. Maximal degree in co-relation 27458. Up to 23983 conditions per place. [2023-08-04 08:15:26,254 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 85 selfloop transitions, 2 changer transitions 1/91 dead transitions. [2023-08-04 08:15:26,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 394 flow [2023-08-04 08:15:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-04 08:15:26,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47007426823940585 [2023-08-04 08:15:26,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-04 08:15:26,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-04 08:15:26,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:26,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-04 08:15:26,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:26,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:26,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:26,267 INFO L175 Difference]: Start difference. First operand has 56 places, 66 transitions, 168 flow. Second operand 3 states and 1076 transitions. [2023-08-04 08:15:26,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 394 flow [2023-08-04 08:15:26,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:15:26,271 INFO L231 Difference]: Finished difference. Result has 57 places, 66 transitions, 172 flow [2023-08-04 08:15:26,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=57, PETRI_TRANSITIONS=66} [2023-08-04 08:15:26,272 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-08-04 08:15:26,273 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 66 transitions, 172 flow [2023-08-04 08:15:26,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:26,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:26,273 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 08:15:26,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:15:26,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:26,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1055448837, now seen corresponding path program 1 times [2023-08-04 08:15:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602506802] [2023-08-04 08:15:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:26,574 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 08:15:26,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602506802] [2023-08-04 08:15:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602506802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373963306] [2023-08-04 08:15:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:26,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:26,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:26,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:15:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:26,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:26,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:26,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373963306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592042116] [2023-08-04 08:15:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:26,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:26,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 172 flow. Second operand has 3 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 08:15:26,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:26,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:26,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:27,523 INFO L124 PetriNetUnfolderBase]: 9902/13849 cut-off events. [2023-08-04 08:15:27,523 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2023-08-04 08:15:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29023 conditions, 13849 events. 9902/13849 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 66715 event pairs, 5239 based on Foata normal form. 0/10808 useless extension candidates. Maximal degree in co-relation 14392. Up to 10116 conditions per place. [2023-08-04 08:15:27,585 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 90 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 08:15:27,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 95 transitions, 420 flow [2023-08-04 08:15:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-04 08:15:27,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47182175622542594 [2023-08-04 08:15:27,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-04 08:15:27,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-04 08:15:27,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:27,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-04 08:15:27,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:27,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:27,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:27,600 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 172 flow. Second operand 3 states and 1080 transitions. [2023-08-04 08:15:27,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 95 transitions, 420 flow [2023-08-04 08:15:27,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:15:27,603 INFO L231 Difference]: Finished difference. Result has 58 places, 67 transitions, 180 flow [2023-08-04 08:15:27,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=67} [2023-08-04 08:15:27,604 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-04 08:15:27,604 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 67 transitions, 180 flow [2023-08-04 08:15:27,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 08:15:27,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:27,605 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] [2023-08-04 08:15:27,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:27,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:27,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:27,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1877520493, now seen corresponding path program 1 times [2023-08-04 08:15:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745661283] [2023-08-04 08:15:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:15:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745661283] [2023-08-04 08:15:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745661283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693101151] [2023-08-04 08:15:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:27,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:27,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:15:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:28,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:28,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:15:28,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693101151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:28,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:28,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880276305] [2023-08-04 08:15:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:28,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:28,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 67 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:28,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:28,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:28,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:28,708 INFO L124 PetriNetUnfolderBase]: 8185/11401 cut-off events. [2023-08-04 08:15:28,708 INFO L125 PetriNetUnfolderBase]: For 2160/2160 co-relation queries the response was YES. [2023-08-04 08:15:28,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24545 conditions, 11401 events. 8185/11401 cut-off events. For 2160/2160 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 52429 event pairs, 5477 based on Foata normal form. 0/9237 useless extension candidates. Maximal degree in co-relation 12622. Up to 10082 conditions per place. [2023-08-04 08:15:28,761 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 91 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-04 08:15:28,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 96 transitions, 430 flow [2023-08-04 08:15:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-04 08:15:28,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47182175622542594 [2023-08-04 08:15:28,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-04 08:15:28,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-04 08:15:28,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:28,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-04 08:15:28,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:28,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:28,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:28,774 INFO L175 Difference]: Start difference. First operand has 58 places, 67 transitions, 180 flow. Second operand 3 states and 1080 transitions. [2023-08-04 08:15:28,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 96 transitions, 430 flow [2023-08-04 08:15:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:28,786 INFO L231 Difference]: Finished difference. Result has 60 places, 68 transitions, 190 flow [2023-08-04 08:15:28,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2023-08-04 08:15:28,787 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 08:15:28,787 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 190 flow [2023-08-04 08:15:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:28,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:28,788 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] [2023-08-04 08:15:28,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:28,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:28,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1362831983, now seen corresponding path program 1 times [2023-08-04 08:15:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:28,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745895838] [2023-08-04 08:15:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:15:29,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745895838] [2023-08-04 08:15:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745895838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542267662] [2023-08-04 08:15:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:29,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:29,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:29,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:29,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:15:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:29,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:15:29,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:15:29,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:15:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542267662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:15:29,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:15:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838890747] [2023-08-04 08:15:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:29,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 763 [2023-08-04 08:15:29,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:29,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:29,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 763 [2023-08-04 08:15:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:29,879 INFO L124 PetriNetUnfolderBase]: 8112/11267 cut-off events. [2023-08-04 08:15:29,879 INFO L125 PetriNetUnfolderBase]: For 1421/1421 co-relation queries the response was YES. [2023-08-04 08:15:29,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24367 conditions, 11267 events. 8112/11267 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 51670 event pairs, 5946 based on Foata normal form. 0/9164 useless extension candidates. Maximal degree in co-relation 21230. Up to 10980 conditions per place. [2023-08-04 08:15:29,909 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 85 selfloop transitions, 2 changer transitions 3/93 dead transitions. [2023-08-04 08:15:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 420 flow [2023-08-04 08:15:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:15:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:15:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2023-08-04 08:15:29,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47007426823940585 [2023-08-04 08:15:29,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2023-08-04 08:15:29,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2023-08-04 08:15:29,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:29,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2023-08-04 08:15:29,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:29,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:29,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:29,923 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 190 flow. Second operand 3 states and 1076 transitions. [2023-08-04 08:15:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 420 flow [2023-08-04 08:15:29,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:29,950 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 188 flow [2023-08-04 08:15:29,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2023-08-04 08:15:29,950 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 08:15:29,951 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 188 flow [2023-08-04 08:15:29,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:29,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:29,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:29,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:15:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:30,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:30,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1749808952, now seen corresponding path program 1 times [2023-08-04 08:15:30,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:30,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920579650] [2023-08-04 08:15:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:15:30,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920579650] [2023-08-04 08:15:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920579650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:15:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190039270] [2023-08-04 08:15:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:30,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:30,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:15:30,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:15:30,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:15:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:30,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:15:30,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:15:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:15:30,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:15:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:15:30,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190039270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:15:30,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:15:30,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:15:30,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170687171] [2023-08-04 08:15:30,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:15:30,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:15:30,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:30,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:15:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:15:30,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 763 [2023-08-04 08:15:30,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 336.2) internal successors, (1681), 5 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:30,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:30,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 763 [2023-08-04 08:15:30,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:15:30,496 INFO L124 PetriNetUnfolderBase]: 21/47 cut-off events. [2023-08-04 08:15:30,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:30,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 47 events. 21/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 102. Up to 30 conditions per place. [2023-08-04 08:15:30,497 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-04 08:15:30,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 112 flow [2023-08-04 08:15:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:15:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:15:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-08-04 08:15:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43905635648754915 [2023-08-04 08:15:30,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-08-04 08:15:30,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-08-04 08:15:30,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:15:30,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-08-04 08:15:30,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:30,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 763.0) internal successors, (3815), 5 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:30,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 763.0) internal successors, (3815), 5 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:30,511 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 188 flow. Second operand 4 states and 1340 transitions. [2023-08-04 08:15:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 112 flow [2023-08-04 08:15:30,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:15:30,512 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 08:15:30,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 08:15:30,512 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -33 predicate places. [2023-08-04 08:15:30,513 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 08:15:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 336.2) internal successors, (1681), 5 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:30,516 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:15:30,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:15:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:15:30,725 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:30,727 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:15:30,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:30,893 INFO L124 PetriNetUnfolderBase]: 137/1018 cut-off events. [2023-08-04 08:15:30,893 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:15:30,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1018 events. 137/1018 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5757 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 08:15:30,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:30,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:30,912 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:30,912 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:30,912 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:30,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:15:31,028 INFO L124 PetriNetUnfolderBase]: 137/1018 cut-off events. [2023-08-04 08:15:31,028 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:15:31,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1018 events. 137/1018 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 5757 event pairs, 0 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 08:15:31,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 33528 [2023-08-04 08:15:38,956 INFO L134 LiptonReduction]: Checked pairs total: 52193 [2023-08-04 08:15:38,956 INFO L136 LiptonReduction]: Total number of compositions: 386 [2023-08-04 08:15:38,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:15:38,958 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;@66a1462e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:38,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:15:38,963 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:38,963 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-08-04 08:15:38,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:15:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:38,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:38,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:15:38,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:38,964 INFO L85 PathProgramCache]: Analyzing trace with hash -843138914, now seen corresponding path program 1 times [2023-08-04 08:15:38,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:38,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106356522] [2023-08-04 08:15:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:15:38,999 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:15:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:15:39,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:15:39,046 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:15:39,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:15:39,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:15:39,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:15:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:15:39,047 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:15:39,048 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:15:39,048 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:15:39,048 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:15:39,098 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:15:39,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:40,316 INFO L124 PetriNetUnfolderBase]: 1040/5489 cut-off events. [2023-08-04 08:15:40,316 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:15:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1040/5489 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 48116 event pairs, 22 based on Foata normal form. 0/4693 useless extension candidates. Maximal degree in co-relation 3305. Up to 192 conditions per place. [2023-08-04 08:15:40,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:40,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:40,480 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:15:40,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:40,480 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:40,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 461 places, 516 transitions, 1122 flow [2023-08-04 08:15:41,460 INFO L124 PetriNetUnfolderBase]: 1040/5489 cut-off events. [2023-08-04 08:15:41,460 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:15:41,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 5489 events. 1040/5489 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 48116 event pairs, 22 based on Foata normal form. 0/4693 useless extension candidates. Maximal degree in co-relation 3305. Up to 192 conditions per place. [2023-08-04 08:15:41,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 107448 [2023-08-04 08:15:50,533 INFO L134 LiptonReduction]: Checked pairs total: 181443 [2023-08-04 08:15:50,533 INFO L136 LiptonReduction]: Total number of compositions: 524 [2023-08-04 08:15:50,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:15:50,534 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66a1462e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:15:50,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:15:50,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:15:50,537 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2023-08-04 08:15:50,537 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:15:50,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:15:50,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:15:50,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:15:50,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:15:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1139593535, now seen corresponding path program 1 times [2023-08-04 08:15:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:15:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662529394] [2023-08-04 08:15:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:15:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:15:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:15:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:15:50,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:15:50,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662529394] [2023-08-04 08:15:50,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662529394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:15:50,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:15:50,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:15:50,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762578353] [2023-08-04 08:15:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:15:50,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:15:50,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:15:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:15:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:15:50,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 452 out of 1040 [2023-08-04 08:15:50,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 455.3333333333333) internal successors, (1366), 3 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:15:50,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:15:50,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 452 of 1040 [2023-08-04 08:15:50,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand