/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/goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:35:37,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:35:37,730 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:35:37,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:35:37,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:35:37,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:35:37,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:35:37,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:35:37,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:35:37,769 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:35:37,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:35:37,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:35:37,770 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:35:37,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:35:37,771 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:35:37,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:35:37,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:35:37,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:35:37,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:35:37,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:35:37,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:35:37,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:35:37,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:35:37,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:35:37,773 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:35:37,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:35:37,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:35:37,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:35:37,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:35:37,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:35:37,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:35:37,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:35:37,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:35:37,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:35:37,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:35:37,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:35:37,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:35:37,777 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:35:37,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:35:37,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:35:37,777 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:35:37,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:35:38,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:35:38,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:35:38,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:35:38,028 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:35:38,028 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:35:38,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i [2023-08-04 04:35:39,190 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:35:39,405 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:35:39,406 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i [2023-08-04 04:35:39,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071356ded/f2738165a27b463e9ce2d43d10e9aa7b/FLAGd02b67aec [2023-08-04 04:35:39,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071356ded/f2738165a27b463e9ce2d43d10e9aa7b [2023-08-04 04:35:39,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:35:39,434 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:35:39,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:35:39,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:35:39,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:35:39,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:39,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5782b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39, skipping insertion in model container [2023-08-04 04:35:39,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:39,497 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:35:39,665 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i[1092,1105] [2023-08-04 04:35:39,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:35:39,860 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:35:39,873 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i[1092,1105] [2023-08-04 04:35:39,889 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-04 04:35:39,890 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-04 04:35:39,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:35:39,946 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:35:39,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39 WrapperNode [2023-08-04 04:35:39,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:35:39,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:35:39,948 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:35:39,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:35:39,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:39,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:39,992 INFO L138 Inliner]: procedures = 165, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 159 [2023-08-04 04:35:39,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:35:39,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:35:39,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:35:39,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:35:40,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,004 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,013 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,019 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,022 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:35:40,023 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:35:40,023 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:35:40,023 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:35:40,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (1/1) ... [2023-08-04 04:35:40,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:35:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:35:40,054 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 04:35:40,056 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 04:35:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-04 04:35:40,084 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2023-08-04 04:35:40,085 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2023-08-04 04:35:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 04:35:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 04:35:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:35:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:35:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:35:40,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:35:40,087 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 04:35:40,196 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:35:40,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:35:40,470 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:35:40,477 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:35:40,478 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 04:35:40,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:35:40 BoogieIcfgContainer [2023-08-04 04:35:40,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:35:40,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:35:40,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:35:40,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:35:40,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:35:39" (1/3) ... [2023-08-04 04:35:40,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2944d513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:35:40, skipping insertion in model container [2023-08-04 04:35:40,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:35:39" (2/3) ... [2023-08-04 04:35:40,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2944d513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:35:40, skipping insertion in model container [2023-08-04 04:35:40,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:35:40" (3/3) ... [2023-08-04 04:35:40,499 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_36-apron_21-traces-cluster-based_true_bound2.i [2023-08-04 04:35:40,508 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:35:40,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:35:40,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-04 04:35:40,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:35:40,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:35:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,814 INFO L124 PetriNetUnfolderBase]: 37/617 cut-off events. [2023-08-04 04:35:40,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:40,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 617 events. 37/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3345 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-04 04:35:40,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:35:40,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,860 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:40,932 INFO L124 PetriNetUnfolderBase]: 37/617 cut-off events. [2023-08-04 04:35:40,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:40,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 617 events. 37/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3345 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-04 04:35:40,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 11766 [2023-08-04 04:35:45,524 INFO L134 LiptonReduction]: Checked pairs total: 25714 [2023-08-04 04:35:45,524 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-04 04:35:45,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:35:45,543 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;@138b05a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:35:45,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 04:35:45,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:35:45,549 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 04:35:45,549 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:45,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:35:45,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:35:45,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:35:45,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:35:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1998240617, now seen corresponding path program 1 times [2023-08-04 04:35:45,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:35:45,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373123258] [2023-08-04 04:35:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:45,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:35:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:45,848 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 04:35:45,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:35:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373123258] [2023-08-04 04:35:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373123258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:35:45,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:35:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:35:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471205303] [2023-08-04 04:35:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:35:45,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:35:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:35:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:35:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:35:45,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 352 [2023-08-04 04:35:45,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:45,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:35:45,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 352 [2023-08-04 04:35:45,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:35:46,718 INFO L124 PetriNetUnfolderBase]: 4999/8619 cut-off events. [2023-08-04 04:35:46,718 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 04:35:46,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16003 conditions, 8619 events. 4999/8619 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 63890 event pairs, 3132 based on Foata normal form. 216/6721 useless extension candidates. Maximal degree in co-relation 15978. Up to 7237 conditions per place. [2023-08-04 04:35:46,778 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 37 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2023-08-04 04:35:46,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 203 flow [2023-08-04 04:35:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:35:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:35:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-08-04 04:35:46,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085227272727273 [2023-08-04 04:35:46,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-08-04 04:35:46,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-08-04 04:35:46,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:35:46,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-08-04 04:35:46,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:46,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:46,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:46,814 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 111 flow. Second operand 3 states and 537 transitions. [2023-08-04 04:35:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 203 flow [2023-08-04 04:35:46,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 203 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:35:46,819 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 113 flow [2023-08-04 04:35:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-08-04 04:35:46,823 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 04:35:46,823 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 113 flow [2023-08-04 04:35:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:46,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:35:46,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:35:46,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:35:46,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:35:46,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:35:46,825 INFO L85 PathProgramCache]: Analyzing trace with hash 422586798, now seen corresponding path program 1 times [2023-08-04 04:35:46,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:35:46,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139749310] [2023-08-04 04:35:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:46,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:35:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:46,937 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 04:35:46,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:35:46,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139749310] [2023-08-04 04:35:46,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139749310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:35:46,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512651297] [2023-08-04 04:35:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:46,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:35:46,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:35:46,951 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 04:35:46,969 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 04:35:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:47,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:35:47,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:35:47,047 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 04:35:47,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:35:47,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512651297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:35:47,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:35:47,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:35:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509506832] [2023-08-04 04:35:47,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:35:47,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:35:47,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:35:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:35:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:35:47,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 352 [2023-08-04 04:35:47,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:47,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:35:47,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 352 [2023-08-04 04:35:47,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:35:47,649 INFO L124 PetriNetUnfolderBase]: 4429/7443 cut-off events. [2023-08-04 04:35:47,649 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 04:35:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13912 conditions, 7443 events. 4429/7443 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 52099 event pairs, 3335 based on Foata normal form. 0/5614 useless extension candidates. Maximal degree in co-relation 13896. Up to 6238 conditions per place. [2023-08-04 04:35:47,699 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 42 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 04:35:47,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 223 flow [2023-08-04 04:35:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:35:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:35:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-04 04:35:47,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-08-04 04:35:47,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-04 04:35:47,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-04 04:35:47,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:35:47,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-04 04:35:47,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:47,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:47,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:47,706 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 113 flow. Second operand 3 states and 540 transitions. [2023-08-04 04:35:47,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 223 flow [2023-08-04 04:35:47,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:35:47,708 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 117 flow [2023-08-04 04:35:47,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-08-04 04:35:47,709 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 04:35:47,709 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 117 flow [2023-08-04 04:35:47,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:35:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:35:47,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 04:35:47,915 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 04:35:47,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-04 04:35:47,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:35:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1923014476, now seen corresponding path program 1 times [2023-08-04 04:35:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:35:47,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036847892] [2023-08-04 04:35:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:47,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:35:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:48,000 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 04:35:48,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:35:48,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036847892] [2023-08-04 04:35:48,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036847892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:35:48,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739822736] [2023-08-04 04:35:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:48,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:35:48,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:35:48,003 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 04:35:48,005 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 04:35:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:48,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:35:48,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:35:48,114 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 04:35:48,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:35:48,129 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 04:35:48,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739822736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:35:48,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:35:48,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:35:48,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133791092] [2023-08-04 04:35:48,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:35:48,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:35:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:35:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:35:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:35:48,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 352 [2023-08-04 04:35:48,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 166.8) internal successors, (834), 5 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:48,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:35:48,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 352 [2023-08-04 04:35:48,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:35:48,172 INFO L124 PetriNetUnfolderBase]: 13/39 cut-off events. [2023-08-04 04:35:48,172 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 04:35:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 39 events. 13/39 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 1 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 80. Up to 24 conditions per place. [2023-08-04 04:35:48,172 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 04:35:48,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 81 flow [2023-08-04 04:35:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:35:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:35:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 674 transitions. [2023-08-04 04:35:48,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786931818181818 [2023-08-04 04:35:48,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 674 transitions. [2023-08-04 04:35:48,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 674 transitions. [2023-08-04 04:35:48,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:35:48,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 674 transitions. [2023-08-04 04:35:48,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.5) internal successors, (674), 4 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:48,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:48,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:48,180 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 117 flow. Second operand 4 states and 674 transitions. [2023-08-04 04:35:48,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 81 flow [2023-08-04 04:35:48,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:35:48,180 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 04:35:48,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 04:35:48,181 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -30 predicate places. [2023-08-04 04:35:48,181 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 04:35:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.8) internal successors, (834), 5 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:48,184 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-04 04:35:48,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-04 04:35:48,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-04 04:35:48,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-04 04:35:48,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-04 04:35:48,185 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-04 04:35:48,196 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 04:35:48,395 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 04:35:48,396 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 04:35:48,398 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:35:48,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,454 INFO L124 PetriNetUnfolderBase]: 37/617 cut-off events. [2023-08-04 04:35:48,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:48,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 617 events. 37/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3345 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-04 04:35:48,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:35:48,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,461 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 183 transitions, 381 flow [2023-08-04 04:35:48,510 INFO L124 PetriNetUnfolderBase]: 37/617 cut-off events. [2023-08-04 04:35:48,510 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:48,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 617 events. 37/617 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3345 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 334. Up to 16 conditions per place. [2023-08-04 04:35:48,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 11766 [2023-08-04 04:35:52,618 INFO L134 LiptonReduction]: Checked pairs total: 24773 [2023-08-04 04:35:52,619 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-04 04:35:52,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:35:52,629 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;@138b05a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:35:52,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:35:52,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:35:52,632 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 04:35:52,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:35:52,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:35:52,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:35:52,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 04:35:52,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:35:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash -390833151, now seen corresponding path program 1 times [2023-08-04 04:35:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:35:52,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259936966] [2023-08-04 04:35:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:52,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:35:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:35:52,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:35:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:35:52,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:35:52,673 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:35:52,673 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 04:35:52,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 04:35:52,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 04:35:52,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:35:52,674 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:35:52,674 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 04:35:52,675 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:35:52,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:35:52,703 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:35:52,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:52,949 INFO L124 PetriNetUnfolderBase]: 119/2015 cut-off events. [2023-08-04 04:35:52,950 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 04:35:52,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2113 conditions, 2015 events. 119/2015 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 16234 event pairs, 0 based on Foata normal form. 0/1779 useless extension candidates. Maximal degree in co-relation 1404. Up to 54 conditions per place. [2023-08-04 04:35:52,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:52,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:52,991 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:35:52,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:52,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:52,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 258 transitions, 552 flow [2023-08-04 04:35:53,228 INFO L124 PetriNetUnfolderBase]: 119/2015 cut-off events. [2023-08-04 04:35:53,228 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 04:35:53,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2113 conditions, 2015 events. 119/2015 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 16234 event pairs, 0 based on Foata normal form. 0/1779 useless extension candidates. Maximal degree in co-relation 1404. Up to 54 conditions per place. [2023-08-04 04:35:53,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 34308 [2023-08-04 04:35:58,638 INFO L134 LiptonReduction]: Checked pairs total: 76039 [2023-08-04 04:35:58,639 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-08-04 04:35:58,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:35:58,641 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;@138b05a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:35:58,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-04 04:35:58,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:35:58,644 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2023-08-04 04:35:58,644 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:35:58,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:35:58,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:35:58,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-08-04 04:35:58,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:35:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash -32989457, now seen corresponding path program 1 times [2023-08-04 04:35:58,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:35:58,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012612685] [2023-08-04 04:35:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:35:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:35:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:35:58,670 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 04:35:58,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:35:58,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012612685] [2023-08-04 04:35:58,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012612685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:35:58,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:35:58,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:35:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944148368] [2023-08-04 04:35:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:35:58,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:35:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:35:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:35:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:35:58,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 493 [2023-08-04 04:35:58,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:35:58,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:35:58,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 493 [2023-08-04 04:35:58,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand