/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:57:36,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:57:36,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:57:36,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:57:36,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:57:36,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:57:36,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:57:36,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:57:36,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:57:36,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:57:36,322 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:57:36,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:57:36,322 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:57:36,323 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:57:36,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:57:36,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:57:36,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:57:36,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:57:36,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:57:36,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:57:36,325 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:57:36,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:57:36,326 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:57:36,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:57:36,327 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:57:36,327 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:57:36,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:57:36,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:57:36,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:57:36,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:57:36,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:57:36,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:57:36,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:57:36,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:57:36,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:57:36,330 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:57:36,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:57:36,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:57:36,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:57:36,688 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:57:36,688 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:57:36,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-26 15:57:37,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:57:38,075 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:57:38,075 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-26 15:57:38,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52790e500/38c9d4ef6fcc488c9bf278232eb25592/FLAG22ba25e32 [2023-08-26 15:57:38,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52790e500/38c9d4ef6fcc488c9bf278232eb25592 [2023-08-26 15:57:38,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:57:38,109 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:57:38,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:57:38,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:57:38,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:57:38,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d59295e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38, skipping insertion in model container [2023-08-26 15:57:38,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,150 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:57:38,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:57:38,486 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:57:38,512 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:57:38,513 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:57:38,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:57:38,581 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:57:38,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38 WrapperNode [2023-08-26 15:57:38,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:57:38,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:57:38,583 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:57:38,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:57:38,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,638 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 149 [2023-08-26 15:57:38,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:57:38,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:57:38,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:57:38,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:57:38,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:57:38,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:57:38,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:57:38,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:57:38,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (1/1) ... [2023-08-26 15:57:38,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:57:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:57:38,726 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) [2023-08-26 15:57:38,736 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 [2023-08-26 15:57:38,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:57:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:57:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:57:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:57:38,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:57:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:57:38,765 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:57:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:57:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:57:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:57:38,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:57:38,767 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:57:38,868 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:57:38,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:57:39,097 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:57:39,103 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:57:39,104 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-26 15:57:39,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:57:39 BoogieIcfgContainer [2023-08-26 15:57:39,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:57:39,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:57:39,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:57:39,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:57:39,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:57:38" (1/3) ... [2023-08-26 15:57:39,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b58a4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:57:39, skipping insertion in model container [2023-08-26 15:57:39,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:57:38" (2/3) ... [2023-08-26 15:57:39,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b58a4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:57:39, skipping insertion in model container [2023-08-26 15:57:39,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:57:39" (3/3) ... [2023-08-26 15:57:39,118 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-26 15:57:39,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:57:39,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 15:57:39,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:57:39,221 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:57:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 152 transitions, 312 flow [2023-08-26 15:57:39,327 INFO L124 PetriNetUnfolderBase]: 36/217 cut-off events. [2023-08-26 15:57:39,327 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:57:39,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 217 events. 36/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 765 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-08-26 15:57:39,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 152 transitions, 312 flow [2023-08-26 15:57:39,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 147 transitions, 299 flow [2023-08-26 15:57:39,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:39,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 147 transitions, 299 flow [2023-08-26 15:57:39,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 147 transitions, 299 flow [2023-08-26 15:57:39,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 147 transitions, 299 flow [2023-08-26 15:57:39,409 INFO L124 PetriNetUnfolderBase]: 35/212 cut-off events. [2023-08-26 15:57:39,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:57:39,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 212 events. 35/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 747 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-08-26 15:57:39,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 6958 [2023-08-26 15:57:42,001 INFO L134 LiptonReduction]: Checked pairs total: 15104 [2023-08-26 15:57:42,001 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-26 15:57:42,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:42,018 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:42,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:42,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:42,024 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2023-08-26 15:57:42,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:57:42,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:42,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:57:42,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:42,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 454871896, now seen corresponding path program 1 times [2023-08-26 15:57:42,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:42,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947219293] [2023-08-26 15:57:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:42,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:42,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:42,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:42,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:42,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:57:42,237 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:42,241 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:42,242 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:42,242 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:57:42,272 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:57:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,336 INFO L124 PetriNetUnfolderBase]: 62/360 cut-off events. [2023-08-26 15:57:42,336 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:57:42,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 62/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1441 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-08-26 15:57:42,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,347 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:42,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 15:57:42,394 INFO L124 PetriNetUnfolderBase]: 62/360 cut-off events. [2023-08-26 15:57:42,394 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:57:42,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 62/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1441 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-08-26 15:57:42,413 INFO L119 LiptonReduction]: Number of co-enabled transitions 19796 [2023-08-26 15:57:45,055 INFO L134 LiptonReduction]: Checked pairs total: 45861 [2023-08-26 15:57:45,055 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-26 15:57:45,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:45,058 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:45,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:45,071 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:45,071 INFO L124 PetriNetUnfolderBase]: 29/115 cut-off events. [2023-08-26 15:57:45,072 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:57:45,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:45,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:57:45,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:45,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1442385110, now seen corresponding path program 1 times [2023-08-26 15:57:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915553031] [2023-08-26 15:57:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:45,129 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:45,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:45,180 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:45,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:57:45,180 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:45,181 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:45,181 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:45,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:57:45,213 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:57:45,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,297 INFO L124 PetriNetUnfolderBase]: 93/540 cut-off events. [2023-08-26 15:57:45,297 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:57:45,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 540 events. 93/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2277 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-26 15:57:45,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:45,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 15:57:45,376 INFO L124 PetriNetUnfolderBase]: 93/540 cut-off events. [2023-08-26 15:57:45,377 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:57:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 540 events. 93/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2277 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-26 15:57:45,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 37338 [2023-08-26 15:57:48,104 INFO L134 LiptonReduction]: Checked pairs total: 106168 [2023-08-26 15:57:48,104 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-08-26 15:57:48,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:48,107 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:48,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:48,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:48,120 INFO L124 PetriNetUnfolderBase]: 50/188 cut-off events. [2023-08-26 15:57:48,120 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:57:48,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:48,120 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:57:48,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:48,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1729045634, now seen corresponding path program 1 times [2023-08-26 15:57:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:48,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133261166] [2023-08-26 15:57:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:48,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:48,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:48,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:48,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:57:48,163 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:48,163 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:48,164 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:48,164 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:57:48,188 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:57:48,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,326 INFO L124 PetriNetUnfolderBase]: 136/796 cut-off events. [2023-08-26 15:57:48,327 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:57:48,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 796 events. 136/796 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3622 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-26 15:57:48,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:48,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 15:57:48,478 INFO L124 PetriNetUnfolderBase]: 136/796 cut-off events. [2023-08-26 15:57:48,479 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:57:48,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 796 events. 136/796 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3622 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-26 15:57:48,529 INFO L119 LiptonReduction]: Number of co-enabled transitions 59976 [2023-08-26 15:57:51,620 INFO L134 LiptonReduction]: Checked pairs total: 181959 [2023-08-26 15:57:51,620 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-26 15:57:51,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:51,622 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:51,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:51,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:51,641 INFO L124 PetriNetUnfolderBase]: 73/263 cut-off events. [2023-08-26 15:57:51,641 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-26 15:57:51,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:51,641 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:51,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:51,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash -182941112, now seen corresponding path program 1 times [2023-08-26 15:57:51,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:51,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3942727] [2023-08-26 15:57:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:51,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:51,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:51,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:51,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:51,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:57:51,685 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:51,686 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:51,686 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:51,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:57:51,708 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:57:51,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:51,892 INFO L124 PetriNetUnfolderBase]: 207/1208 cut-off events. [2023-08-26 15:57:51,892 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:57:51,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 1208 events. 207/1208 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6190 event pairs, 23 based on Foata normal form. 0/930 useless extension candidates. Maximal degree in co-relation 841. Up to 80 conditions per place. [2023-08-26 15:57:51,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:51,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:51,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:51,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:51,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:51,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 356 transitions, 772 flow [2023-08-26 15:57:52,123 INFO L124 PetriNetUnfolderBase]: 207/1208 cut-off events. [2023-08-26 15:57:52,123 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:57:52,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 1208 events. 207/1208 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6190 event pairs, 23 based on Foata normal form. 0/930 useless extension candidates. Maximal degree in co-relation 841. Up to 80 conditions per place. [2023-08-26 15:57:52,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 87710 [2023-08-26 15:57:55,164 INFO L134 LiptonReduction]: Checked pairs total: 262465 [2023-08-26 15:57:55,164 INFO L136 LiptonReduction]: Total number of compositions: 260 [2023-08-26 15:57:55,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:55,166 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:55,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:55,191 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:55,192 INFO L124 PetriNetUnfolderBase]: 91/338 cut-off events. [2023-08-26 15:57:55,192 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-26 15:57:55,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:55,192 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:55,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:55,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1073038116, now seen corresponding path program 1 times [2023-08-26 15:57:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:55,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486307572] [2023-08-26 15:57:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:55,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:55,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:55,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:55,269 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:55,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:57:55,270 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:55,270 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:55,270 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:55,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:57:55,302 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:57:55,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:55,672 INFO L124 PetriNetUnfolderBase]: 342/1940 cut-off events. [2023-08-26 15:57:55,672 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:57:55,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 1940 events. 342/1940 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11687 event pairs, 72 based on Foata normal form. 0/1507 useless extension candidates. Maximal degree in co-relation 1307. Up to 192 conditions per place. [2023-08-26 15:57:55,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:55,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:55,758 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:57:55,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:55,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:55,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 407 transitions, 892 flow [2023-08-26 15:57:56,144 INFO L124 PetriNetUnfolderBase]: 342/1940 cut-off events. [2023-08-26 15:57:56,145 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:57:56,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 1940 events. 342/1940 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11687 event pairs, 72 based on Foata normal form. 0/1507 useless extension candidates. Maximal degree in co-relation 1307. Up to 192 conditions per place. [2023-08-26 15:57:56,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 120540 [2023-08-26 15:57:59,601 INFO L134 LiptonReduction]: Checked pairs total: 382388 [2023-08-26 15:57:59,602 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-08-26 15:57:59,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:57:59,604 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:57:59,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:57:59,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:57:59,635 INFO L124 PetriNetUnfolderBase]: 115/426 cut-off events. [2023-08-26 15:57:59,635 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-26 15:57:59,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:57:59,636 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:57:59,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:57:59,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:57:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1076021270, now seen corresponding path program 1 times [2023-08-26 15:57:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:57:59,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015394887] [2023-08-26 15:57:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:57:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:57:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:59,658 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:57:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:57:59,678 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:57:59,678 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:57:59,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:57:59,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:57:59,679 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:57:59,679 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:57:59,679 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:57:59,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:57:59,708 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:57:59,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:00,404 INFO L124 PetriNetUnfolderBase]: 621/3328 cut-off events. [2023-08-26 15:58:00,405 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:58:00,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 3328 events. 621/3328 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 23575 event pairs, 201 based on Foata normal form. 0/2612 useless extension candidates. Maximal degree in co-relation 2158. Up to 448 conditions per place. [2023-08-26 15:58:00,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:00,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:00,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:00,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:00,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:00,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 458 transitions, 1014 flow [2023-08-26 15:58:01,151 INFO L124 PetriNetUnfolderBase]: 621/3328 cut-off events. [2023-08-26 15:58:01,151 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:58:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 3328 events. 621/3328 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 23575 event pairs, 201 based on Foata normal form. 0/2612 useless extension candidates. Maximal degree in co-relation 2158. Up to 448 conditions per place. [2023-08-26 15:58:01,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 158466 [2023-08-26 15:58:04,824 INFO L134 LiptonReduction]: Checked pairs total: 501833 [2023-08-26 15:58:04,825 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-26 15:58:04,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:04,827 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:04,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:04,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:04,877 INFO L124 PetriNetUnfolderBase]: 144/537 cut-off events. [2023-08-26 15:58:04,877 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-08-26 15:58:04,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:04,877 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:04,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:04,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1203260633, now seen corresponding path program 1 times [2023-08-26 15:58:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:04,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310735949] [2023-08-26 15:58:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:04,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:04,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:04,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:04,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:04,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:58:04,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:04,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:04,939 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:04,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:58:04,974 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:58:04,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:06,222 INFO L124 PetriNetUnfolderBase]: 1220/6060 cut-off events. [2023-08-26 15:58:06,222 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:58:06,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7145 conditions, 6060 events. 1220/6060 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 50710 event pairs, 522 based on Foata normal form. 0/4805 useless extension candidates. Maximal degree in co-relation 3810. Up to 1024 conditions per place. [2023-08-26 15:58:06,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:06,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:06,488 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:06,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:06,488 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 509 transitions, 1138 flow [2023-08-26 15:58:07,839 INFO L124 PetriNetUnfolderBase]: 1220/6060 cut-off events. [2023-08-26 15:58:07,839 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:58:07,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7145 conditions, 6060 events. 1220/6060 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 50710 event pairs, 522 based on Foata normal form. 0/4805 useless extension candidates. Maximal degree in co-relation 3810. Up to 1024 conditions per place. [2023-08-26 15:58:08,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 201488 [2023-08-26 15:58:12,133 INFO L134 LiptonReduction]: Checked pairs total: 631833 [2023-08-26 15:58:12,133 INFO L136 LiptonReduction]: Total number of compositions: 371 [2023-08-26 15:58:12,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:12,135 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:12,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:12,203 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:12,203 INFO L124 PetriNetUnfolderBase]: 168/648 cut-off events. [2023-08-26 15:58:12,203 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-26 15:58:12,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:12,203 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:12,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:12,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 601824855, now seen corresponding path program 1 times [2023-08-26 15:58:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957992216] [2023-08-26 15:58:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:12,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:12,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:12,246 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:12,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:12,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:58:12,246 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:12,247 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:12,247 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:12,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:58:12,284 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:58:12,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:15,121 INFO L124 PetriNetUnfolderBase]: 2523/11544 cut-off events. [2023-08-26 15:58:15,121 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:58:15,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13921 conditions, 11544 events. 2523/11544 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 112004 event pairs, 1291 based on Foata normal form. 0/9238 useless extension candidates. Maximal degree in co-relation 7127. Up to 2304 conditions per place. [2023-08-26 15:58:15,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:15,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:15,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:15,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:15,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:15,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 459 places, 560 transitions, 1264 flow [2023-08-26 15:58:18,260 INFO L124 PetriNetUnfolderBase]: 2523/11544 cut-off events. [2023-08-26 15:58:18,260 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:58:18,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13921 conditions, 11544 events. 2523/11544 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 112004 event pairs, 1291 based on Foata normal form. 0/9238 useless extension candidates. Maximal degree in co-relation 7127. Up to 2304 conditions per place. [2023-08-26 15:58:19,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 249606 [2023-08-26 15:58:23,465 INFO L134 LiptonReduction]: Checked pairs total: 768413 [2023-08-26 15:58:23,465 INFO L136 LiptonReduction]: Total number of compositions: 422 [2023-08-26 15:58:23,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:23,467 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:23,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:23,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:23,557 INFO L124 PetriNetUnfolderBase]: 216/820 cut-off events. [2023-08-26 15:58:23,557 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-08-26 15:58:23,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:23,557 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:23,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:23,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2088516525, now seen corresponding path program 1 times [2023-08-26 15:58:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663757733] [2023-08-26 15:58:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:23,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:23,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:23,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:23,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:23,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:23,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:58:23,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:23,604 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:23,604 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:23,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:58:23,647 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:58:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:29,855 INFO L124 PetriNetUnfolderBase]: 5362/22660 cut-off events. [2023-08-26 15:58:29,856 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:58:30,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27866 conditions, 22660 events. 5362/22660 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 248909 event pairs, 3084 based on Foata normal form. 0/18279 useless extension candidates. Maximal degree in co-relation 13901. Up to 5120 conditions per place. [2023-08-26 15:58:30,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:30,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:30,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:58:30,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:30,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 611 transitions, 1392 flow [2023-08-26 15:58:36,832 INFO L124 PetriNetUnfolderBase]: 5362/22660 cut-off events. [2023-08-26 15:58:36,833 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:58:37,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27866 conditions, 22660 events. 5362/22660 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 248909 event pairs, 3084 based on Foata normal form. 0/18279 useless extension candidates. Maximal degree in co-relation 13901. Up to 5120 conditions per place. [2023-08-26 15:58:38,894 INFO L119 LiptonReduction]: Number of co-enabled transitions 302820 [2023-08-26 15:58:43,301 INFO L134 LiptonReduction]: Checked pairs total: 944442 [2023-08-26 15:58:43,302 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-08-26 15:58:43,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:58:43,303 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:58:43,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:58:43,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:58:43,402 INFO L124 PetriNetUnfolderBase]: 276/1039 cut-off events. [2023-08-26 15:58:43,402 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-26 15:58:43,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:58:43,402 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:58:43,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:58:43,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:58:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash -467365033, now seen corresponding path program 1 times [2023-08-26 15:58:43,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:58:43,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729246989] [2023-08-26 15:58:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:58:43,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:58:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:43,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:58:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:58:43,441 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:58:43,441 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:58:43,441 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:58:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:58:43,442 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:58:43,442 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:58:43,442 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:58:43,442 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:58:43,479 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:58:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 662 transitions, 1522 flow [2023-08-26 15:58:57,334 INFO L124 PetriNetUnfolderBase]: 11529/45296 cut-off events. [2023-08-26 15:58:57,335 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:58:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56660 conditions, 45296 events. 11529/45296 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 559428 event pairs, 7181 based on Foata normal form. 0/36792 useless extension candidates. Maximal degree in co-relation 27845. Up to 11264 conditions per place. [2023-08-26 15:58:59,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 662 transitions, 1522 flow [2023-08-26 15:59:00,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 662 transitions, 1522 flow [2023-08-26 15:59:00,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:59:00,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 662 transitions, 1522 flow [2023-08-26 15:59:00,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 662 transitions, 1522 flow [2023-08-26 15:59:00,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 662 transitions, 1522 flow [2023-08-26 15:59:13,754 INFO L124 PetriNetUnfolderBase]: 11529/45296 cut-off events. [2023-08-26 15:59:13,754 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:59:16,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56660 conditions, 45296 events. 11529/45296 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 559428 event pairs, 7181 based on Foata normal form. 0/36792 useless extension candidates. Maximal degree in co-relation 27845. Up to 11264 conditions per place. [2023-08-26 15:59:19,501 INFO L119 LiptonReduction]: Number of co-enabled transitions 361130 [2023-08-26 15:59:24,062 INFO L134 LiptonReduction]: Checked pairs total: 990052 [2023-08-26 15:59:24,062 INFO L136 LiptonReduction]: Total number of compositions: 482 [2023-08-26 15:59:24,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:59:24,070 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:59:24,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:59:24,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:59:24,229 INFO L124 PetriNetUnfolderBase]: 402/1423 cut-off events. [2023-08-26 15:59:24,230 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2023-08-26 15:59:24,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:59:24,230 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:59:24,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:59:24,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:59:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash -687172266, now seen corresponding path program 1 times [2023-08-26 15:59:24,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:59:24,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767354772] [2023-08-26 15:59:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:59:24,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:59:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:24,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:59:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:59:24,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:59:24,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:59:24,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:59:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:59:24,279 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:59:24,279 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:59:24,280 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:59:24,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:59:24,319 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:59:24,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 582 places, 713 transitions, 1654 flow [2023-08-26 15:59:58,633 INFO L124 PetriNetUnfolderBase]: 24864/91484 cut-off events. [2023-08-26 15:59:58,633 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 16:00:06,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116175 conditions, 91484 events. 24864/91484 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 1231906 event pairs, 16398 based on Foata normal form. 0/74761 useless extension candidates. Maximal degree in co-relation 56639. Up to 24576 conditions per place. [2023-08-26 16:00:06,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 582 places, 713 transitions, 1654 flow [2023-08-26 16:00:08,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 582 places, 713 transitions, 1654 flow [2023-08-26 16:00:08,786 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:00:08,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 582 places, 713 transitions, 1654 flow [2023-08-26 16:00:08,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 582 places, 713 transitions, 1654 flow [2023-08-26 16:00:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 582 places, 713 transitions, 1654 flow [2023-08-26 16:00:39,773 INFO L124 PetriNetUnfolderBase]: 24864/91484 cut-off events. [2023-08-26 16:00:39,774 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 16:00:47,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116175 conditions, 91484 events. 24864/91484 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 1231906 event pairs, 16398 based on Foata normal form. 0/74761 useless extension candidates. Maximal degree in co-relation 56639. Up to 24576 conditions per place. [2023-08-26 16:01:00,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 424536 [2023-08-26 16:01:05,941 INFO L134 LiptonReduction]: Checked pairs total: 1366913 [2023-08-26 16:01:05,941 INFO L136 LiptonReduction]: Total number of compositions: 522 [2023-08-26 16:01:05,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 16:01:05,942 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=false, 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;@a0b0157, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:01:05,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 16:01:06,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:01:06,170 INFO L124 PetriNetUnfolderBase]: 575/1934 cut-off events. [2023-08-26 16:01:06,170 INFO L125 PetriNetUnfolderBase]: For 921/921 co-relation queries the response was YES. [2023-08-26 16:01:06,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:01:06,170 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:01:06,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 16:01:06,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:01:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash 317187470, now seen corresponding path program 1 times [2023-08-26 16:01:06,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:01:06,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166926538] [2023-08-26 16:01:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:01:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:01:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:01:06,200 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 16:01:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 16:01:06,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 16:01:06,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 16:01:06,223 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 16:01:06,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 16:01:06,223 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 16:01:06,224 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 16:01:06,224 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 16:01:06,224 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 16:01:06,269 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 16:01:06,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 764 transitions, 1788 flow [2023-08-26 16:02:20,025 INFO L124 PetriNetUnfolderBase]: 53559/185800 cut-off events. [2023-08-26 16:02:20,025 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 16:02:40,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239179 conditions, 185800 events. 53559/185800 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4227. Compared 2721975 event pairs, 36879 based on Foata normal form. 0/152666 useless extension candidates. Maximal degree in co-relation 116154. Up to 53248 conditions per place. [2023-08-26 16:02:40,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 623 places, 764 transitions, 1788 flow [2023-08-26 16:02:49,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 623 places, 764 transitions, 1788 flow [2023-08-26 16:02:49,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:02:49,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 623 places, 764 transitions, 1788 flow [2023-08-26 16:02:49,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 623 places, 764 transitions, 1788 flow [2023-08-26 16:02:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 623 places, 764 transitions, 1788 flow