/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_05-lockfuns_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:38:09,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:38:09,103 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 15:38:09,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:38:09,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:38:09,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:38:09,140 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:38:09,140 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:38:09,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:38:09,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:38:09,144 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:38:09,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:38:09,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:38:09,146 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:38:09,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:38:09,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:38:09,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:38:09,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:38:09,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:38:09,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:38:09,147 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:38:09,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:38:09,148 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:38:09,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:38:09,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:38:09,149 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:38:09,150 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:38:09,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:38:09,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:38:09,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:38:09,151 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:38:09,151 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:38:09,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:38:09,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:38:09,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:38:09,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:38:09,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:38:09,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:38:09,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:38:09,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:38:09,490 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:38:09,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-08-26 15:38:10,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:38:11,029 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:38:11,030 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-08-26 15:38:11,048 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b39810b5/9efb86040cdf41a4a8ed8b5e24fe6414/FLAG759845259 [2023-08-26 15:38:11,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b39810b5/9efb86040cdf41a4a8ed8b5e24fe6414 [2023-08-26 15:38:11,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:38:11,069 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:38:11,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:38:11,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:38:11,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:38:11,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320b9af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11, skipping insertion in model container [2023-08-26 15:38:11,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,121 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:38:11,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:38:11,429 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:38:11,445 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:38:11,447 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:38:11,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:38:11,499 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:38:11,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11 WrapperNode [2023-08-26 15:38:11,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:38:11,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:38:11,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:38:11,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:38:11,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,529 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,549 INFO L138 Inliner]: procedures = 172, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 111 [2023-08-26 15:38:11,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:38:11,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:38:11,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:38:11,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:38:11,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:38:11,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:38:11,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:38:11,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:38:11,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (1/1) ... [2023-08-26 15:38:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:38:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:38:11,602 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 15:38:11,616 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 15:38:11,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:38:11,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:38:11,643 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:38:11,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:38:11,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:38:11,643 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:38:11,644 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:38:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:38:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:38:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:38:11,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:38:11,646 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 15:38:11,748 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:38:11,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:38:11,911 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:38:11,917 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:38:11,918 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 15:38:11,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:38:11 BoogieIcfgContainer [2023-08-26 15:38:11,920 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:38:11,922 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:38:11,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:38:11,924 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:38:11,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:38:11" (1/3) ... [2023-08-26 15:38:11,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545d8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:38:11, skipping insertion in model container [2023-08-26 15:38:11,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:38:11" (2/3) ... [2023-08-26 15:38:11,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545d8d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:38:11, skipping insertion in model container [2023-08-26 15:38:11,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:38:11" (3/3) ... [2023-08-26 15:38:11,931 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-08-26 15:38:11,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:38:11,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 15:38:11,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:38:12,038 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:38:12,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 113 transitions, 234 flow [2023-08-26 15:38:12,157 INFO L124 PetriNetUnfolderBase]: 19/158 cut-off events. [2023-08-26 15:38:12,158 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:38:12,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 158 events. 19/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 421 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-26 15:38:12,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 113 transitions, 234 flow [2023-08-26 15:38:12,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 108 transitions, 221 flow [2023-08-26 15:38:12,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:12,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 108 transitions, 221 flow [2023-08-26 15:38:12,181 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 108 transitions, 221 flow [2023-08-26 15:38:12,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 221 flow [2023-08-26 15:38:12,220 INFO L124 PetriNetUnfolderBase]: 18/153 cut-off events. [2023-08-26 15:38:12,220 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:38:12,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 153 events. 18/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 403 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-26 15:38:12,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 3060 [2023-08-26 15:38:14,612 INFO L134 LiptonReduction]: Checked pairs total: 4498 [2023-08-26 15:38:14,613 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 15:38:14,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:14,640 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:14,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:14,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:14,653 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2023-08-26 15:38:14,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:38:14,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 15:38:14,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:14,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 156744085, now seen corresponding path program 1 times [2023-08-26 15:38:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189785641] [2023-08-26 15:38:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:14,782 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:14,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:14,848 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:14,849 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:14,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:38:14,852 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:14,856 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:14,857 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:14,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 15:38:14,879 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 15:38:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,917 INFO L124 PetriNetUnfolderBase]: 34/262 cut-off events. [2023-08-26 15:38:14,917 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:38:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 262 events. 34/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 851 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-26 15:38:14,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,921 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:14,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 145 transitions, 308 flow [2023-08-26 15:38:14,950 INFO L124 PetriNetUnfolderBase]: 34/262 cut-off events. [2023-08-26 15:38:14,950 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:38:14,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 262 events. 34/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 851 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-26 15:38:14,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 8580 [2023-08-26 15:38:17,278 INFO L134 LiptonReduction]: Checked pairs total: 19684 [2023-08-26 15:38:17,278 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-26 15:38:17,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:17,281 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:17,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:17,292 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:17,292 INFO L124 PetriNetUnfolderBase]: 14/71 cut-off events. [2023-08-26 15:38:17,292 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:38:17,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:17,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:38:17,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:17,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 969563122, now seen corresponding path program 1 times [2023-08-26 15:38:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:17,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8870709] [2023-08-26 15:38:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:17,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:17,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:17,342 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:17,342 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:17,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:38:17,342 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:17,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:17,343 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:17,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 15:38:17,361 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 15:38:17,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,403 INFO L124 PetriNetUnfolderBase]: 54/403 cut-off events. [2023-08-26 15:38:17,403 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:38:17,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 403 events. 54/403 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1454 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-08-26 15:38:17,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,411 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:17,411 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,411 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 177 transitions, 384 flow [2023-08-26 15:38:17,448 INFO L124 PetriNetUnfolderBase]: 54/403 cut-off events. [2023-08-26 15:38:17,449 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:38:17,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 403 events. 54/403 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1454 event pairs, 1 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-08-26 15:38:17,465 INFO L119 LiptonReduction]: Number of co-enabled transitions 15840 [2023-08-26 15:38:19,934 INFO L134 LiptonReduction]: Checked pairs total: 35884 [2023-08-26 15:38:19,934 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-26 15:38:19,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:19,937 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:19,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:19,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:19,945 INFO L124 PetriNetUnfolderBase]: 21/104 cut-off events. [2023-08-26 15:38:19,945 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 15:38:19,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:19,946 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 15:38:19,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:19,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash 439626518, now seen corresponding path program 1 times [2023-08-26 15:38:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:19,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260067888] [2023-08-26 15:38:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:19,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:19,992 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:20,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:20,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:20,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:38:20,037 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:20,037 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:20,037 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:20,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 15:38:20,064 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 15:38:20,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,144 INFO L124 PetriNetUnfolderBase]: 86/620 cut-off events. [2023-08-26 15:38:20,145 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:38:20,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 86/620 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2595 event pairs, 6 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-26 15:38:20,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,158 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:20,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 209 transitions, 462 flow [2023-08-26 15:38:20,257 INFO L124 PetriNetUnfolderBase]: 86/620 cut-off events. [2023-08-26 15:38:20,257 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:38:20,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 86/620 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2595 event pairs, 6 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-26 15:38:20,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-26 15:38:22,710 INFO L134 LiptonReduction]: Checked pairs total: 62018 [2023-08-26 15:38:22,710 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-26 15:38:22,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:22,713 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:22,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:22,727 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:22,727 INFO L124 PetriNetUnfolderBase]: 37/164 cut-off events. [2023-08-26 15:38:22,727 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 15:38:22,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:22,727 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:22,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:22,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -217941949, now seen corresponding path program 1 times [2023-08-26 15:38:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135376263] [2023-08-26 15:38:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:22,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:22,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:22,781 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:22,781 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:22,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:38:22,781 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:22,784 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:22,785 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:22,785 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 15:38:22,820 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:38:22,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,010 INFO L124 PetriNetUnfolderBase]: 146/993 cut-off events. [2023-08-26 15:38:23,011 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:38:23,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 993 events. 146/993 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4897 event pairs, 23 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2023-08-26 15:38:23,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:23,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 241 transitions, 542 flow [2023-08-26 15:38:23,176 INFO L124 PetriNetUnfolderBase]: 146/993 cut-off events. [2023-08-26 15:38:23,177 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-26 15:38:23,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 993 events. 146/993 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4897 event pairs, 23 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2023-08-26 15:38:23,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 36300 [2023-08-26 15:38:25,771 INFO L134 LiptonReduction]: Checked pairs total: 93025 [2023-08-26 15:38:25,772 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-26 15:38:25,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:25,778 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:25,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:25,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:25,794 INFO L124 PetriNetUnfolderBase]: 51/222 cut-off events. [2023-08-26 15:38:25,794 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 15:38:25,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:25,794 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:25,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:25,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash -653858121, now seen corresponding path program 1 times [2023-08-26 15:38:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:25,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137832715] [2023-08-26 15:38:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:25,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:25,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:25,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:25,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:25,891 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:25,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:38:25,891 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:25,892 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:25,892 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:25,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 15:38:25,922 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-26 15:38:25,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,184 INFO L124 PetriNetUnfolderBase]: 270/1686 cut-off events. [2023-08-26 15:38:26,186 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:38:26,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 1686 events. 270/1686 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10032 event pairs, 72 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 1092. Up to 192 conditions per place. [2023-08-26 15:38:26,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,239 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:26,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,240 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 273 transitions, 624 flow [2023-08-26 15:38:26,498 INFO L124 PetriNetUnfolderBase]: 270/1686 cut-off events. [2023-08-26 15:38:26,499 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-26 15:38:26,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 1686 events. 270/1686 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10032 event pairs, 72 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 1092. Up to 192 conditions per place. [2023-08-26 15:38:26,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 49500 [2023-08-26 15:38:29,197 INFO L134 LiptonReduction]: Checked pairs total: 129043 [2023-08-26 15:38:29,197 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-26 15:38:29,199 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:29,199 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:29,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:29,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:29,222 INFO L124 PetriNetUnfolderBase]: 68/294 cut-off events. [2023-08-26 15:38:29,222 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-26 15:38:29,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:29,222 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:29,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:29,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash -878186494, now seen corresponding path program 1 times [2023-08-26 15:38:29,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344789788] [2023-08-26 15:38:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:29,263 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:29,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:29,300 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:29,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:29,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:38:29,307 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:29,310 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:29,311 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:29,311 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-26 15:38:29,338 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-26 15:38:29,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:29,947 INFO L124 PetriNetUnfolderBase]: 538/3035 cut-off events. [2023-08-26 15:38:29,947 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:38:30,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3533 conditions, 3035 events. 538/3035 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 21595 event pairs, 201 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 1904. Up to 448 conditions per place. [2023-08-26 15:38:30,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:30,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:30,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:30,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:30,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:30,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 305 transitions, 708 flow [2023-08-26 15:38:30,578 INFO L124 PetriNetUnfolderBase]: 538/3035 cut-off events. [2023-08-26 15:38:30,579 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-26 15:38:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3533 conditions, 3035 events. 538/3035 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 21595 event pairs, 201 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 1904. Up to 448 conditions per place. [2023-08-26 15:38:30,747 INFO L119 LiptonReduction]: Number of co-enabled transitions 64680 [2023-08-26 15:38:33,422 INFO L134 LiptonReduction]: Checked pairs total: 175066 [2023-08-26 15:38:33,422 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-26 15:38:33,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:33,424 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:33,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:33,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:33,456 INFO L124 PetriNetUnfolderBase]: 85/379 cut-off events. [2023-08-26 15:38:33,456 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-26 15:38:33,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:33,457 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:33,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:33,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash -84039645, now seen corresponding path program 1 times [2023-08-26 15:38:33,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:33,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777615620] [2023-08-26 15:38:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:33,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:33,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:33,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:33,496 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:33,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:38:33,496 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:33,496 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:33,497 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:33,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-26 15:38:33,523 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 15:38:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:34,719 INFO L124 PetriNetUnfolderBase]: 1126/5728 cut-off events. [2023-08-26 15:38:34,719 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:38:34,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 5728 events. 1126/5728 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48353 event pairs, 522 based on Foata normal form. 0/4575 useless extension candidates. Maximal degree in co-relation 3517. Up to 1024 conditions per place. [2023-08-26 15:38:34,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:34,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:34,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:34,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:34,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:34,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 337 transitions, 794 flow [2023-08-26 15:38:36,000 INFO L124 PetriNetUnfolderBase]: 1126/5728 cut-off events. [2023-08-26 15:38:36,001 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-26 15:38:36,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6813 conditions, 5728 events. 1126/5728 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48353 event pairs, 522 based on Foata normal form. 0/4575 useless extension candidates. Maximal degree in co-relation 3517. Up to 1024 conditions per place. [2023-08-26 15:38:36,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 81840 [2023-08-26 15:38:38,994 INFO L134 LiptonReduction]: Checked pairs total: 222508 [2023-08-26 15:38:38,994 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-26 15:38:38,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:38,996 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:38,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:39,040 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:39,040 INFO L124 PetriNetUnfolderBase]: 115/504 cut-off events. [2023-08-26 15:38:39,040 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-26 15:38:39,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:39,040 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:39,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:39,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1046537656, now seen corresponding path program 1 times [2023-08-26 15:38:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:39,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084089780] [2023-08-26 15:38:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:39,062 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:39,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:39,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:39,081 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:39,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:38:39,081 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:39,082 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:39,082 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:39,082 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-26 15:38:39,110 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-26 15:38:39,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:41,239 INFO L124 PetriNetUnfolderBase]: 2418/11173 cut-off events. [2023-08-26 15:38:41,239 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:38:41,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13550 conditions, 11173 events. 2418/11173 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 110184 event pairs, 1291 based on Foata normal form. 0/8981 useless extension candidates. Maximal degree in co-relation 6795. Up to 2304 conditions per place. [2023-08-26 15:38:41,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:41,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:41,529 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:41,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:41,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:41,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 369 transitions, 882 flow [2023-08-26 15:38:43,582 INFO L124 PetriNetUnfolderBase]: 2418/11173 cut-off events. [2023-08-26 15:38:43,583 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-26 15:38:43,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13550 conditions, 11173 events. 2418/11173 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 110184 event pairs, 1291 based on Foata normal form. 0/8981 useless extension candidates. Maximal degree in co-relation 6795. Up to 2304 conditions per place. [2023-08-26 15:38:44,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 100980 [2023-08-26 15:38:47,113 INFO L134 LiptonReduction]: Checked pairs total: 310022 [2023-08-26 15:38:47,113 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-08-26 15:38:47,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:38:47,116 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:38:47,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:38:47,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:38:47,167 INFO L124 PetriNetUnfolderBase]: 170/705 cut-off events. [2023-08-26 15:38:47,167 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-26 15:38:47,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:38:47,167 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:38:47,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:38:47,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:38:47,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1373506646, now seen corresponding path program 1 times [2023-08-26 15:38:47,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:38:47,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64917047] [2023-08-26 15:38:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:38:47,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:38:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:47,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:38:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:38:47,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:38:47,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:38:47,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:38:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:38:47,207 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:38:47,208 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:38:47,208 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:38:47,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-26 15:38:47,236 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-26 15:38:47,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:51,824 INFO L124 PetriNetUnfolderBase]: 5246/22250 cut-off events. [2023-08-26 15:38:51,824 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:38:52,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 22250 events. 5246/22250 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 244996 event pairs, 3084 based on Foata normal form. 0/17995 useless extension candidates. Maximal degree in co-relation 13530. Up to 5120 conditions per place. [2023-08-26 15:38:52,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:52,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:52,382 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:38:52,382 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:52,382 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:52,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 401 transitions, 972 flow [2023-08-26 15:38:56,773 INFO L124 PetriNetUnfolderBase]: 5246/22250 cut-off events. [2023-08-26 15:38:56,773 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-26 15:38:57,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27456 conditions, 22250 events. 5246/22250 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 244996 event pairs, 3084 based on Foata normal form. 0/17995 useless extension candidates. Maximal degree in co-relation 13530. Up to 5120 conditions per place. [2023-08-26 15:38:58,200 INFO L119 LiptonReduction]: Number of co-enabled transitions 122100 [2023-08-26 15:39:01,378 INFO L134 LiptonReduction]: Checked pairs total: 343551 [2023-08-26 15:39:01,379 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-26 15:39:01,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:39:01,380 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:39:01,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:39:01,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:39:01,467 INFO L124 PetriNetUnfolderBase]: 244/976 cut-off events. [2023-08-26 15:39:01,467 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-26 15:39:01,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:39:01,467 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:39:01,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:39:01,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:39:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1850423824, now seen corresponding path program 1 times [2023-08-26 15:39:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:39:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142441533] [2023-08-26 15:39:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:39:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:39:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:39:01,491 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:39:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:39:01,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:39:01,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:39:01,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:39:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:39:01,511 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:39:01,511 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:39:01,511 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:39:01,511 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-26 15:39:01,540 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-26 15:39:01,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:11,488 INFO L124 PetriNetUnfolderBase]: 11402/44847 cut-off events. [2023-08-26 15:39:11,488 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:39:12,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56211 conditions, 44847 events. 11402/44847 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 553580 event pairs, 7181 based on Foata normal form. 0/36481 useless extension candidates. Maximal degree in co-relation 27435. Up to 11264 conditions per place. [2023-08-26 15:39:12,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:13,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:13,600 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:39:13,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:13,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 433 transitions, 1064 flow [2023-08-26 15:39:23,840 INFO L124 PetriNetUnfolderBase]: 11402/44847 cut-off events. [2023-08-26 15:39:23,840 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-26 15:39:25,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56211 conditions, 44847 events. 11402/44847 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 553580 event pairs, 7181 based on Foata normal form. 0/36481 useless extension candidates. Maximal degree in co-relation 27435. Up to 11264 conditions per place. [2023-08-26 15:39:27,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 145200 [2023-08-26 15:39:30,422 INFO L134 LiptonReduction]: Checked pairs total: 409558 [2023-08-26 15:39:30,422 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-08-26 15:39:30,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:39:30,424 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:39:30,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:39:30,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:39:30,586 INFO L124 PetriNetUnfolderBase]: 360/1373 cut-off events. [2023-08-26 15:39:30,586 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-26 15:39:30,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:39:30,586 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:39:30,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:39:30,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:39:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1952608209, now seen corresponding path program 1 times [2023-08-26 15:39:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:39:30,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736496085] [2023-08-26 15:39:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:39:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:39:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:39:30,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:39:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:39:30,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:39:30,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:39:30,632 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:39:30,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:39:30,633 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:39:30,633 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:39:30,633 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:39:30,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-26 15:39:30,665 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-26 15:39:30,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 465 transitions, 1158 flow [2023-08-26 15:39:53,050 INFO L124 PetriNetUnfolderBase]: 24726/90996 cut-off events. [2023-08-26 15:39:53,050 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:39:57,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115687 conditions, 90996 events. 24726/90996 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2202. Compared 1219622 event pairs, 16398 based on Foata normal form. 0/74423 useless extension candidates. Maximal degree in co-relation 56190. Up to 24576 conditions per place. [2023-08-26 15:39:57,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 400 places, 465 transitions, 1158 flow [2023-08-26 15:39:59,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 400 places, 465 transitions, 1158 flow [2023-08-26 15:39:59,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:39:59,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 400 places, 465 transitions, 1158 flow [2023-08-26 15:39:59,182 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 400 places, 465 transitions, 1158 flow [2023-08-26 15:39:59,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 400 places, 465 transitions, 1158 flow [2023-08-26 15:40:22,992 INFO L124 PetriNetUnfolderBase]: 24726/90996 cut-off events. [2023-08-26 15:40:22,992 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-26 15:40:27,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115687 conditions, 90996 events. 24726/90996 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 2202. Compared 1219622 event pairs, 16398 based on Foata normal form. 0/74423 useless extension candidates. Maximal degree in co-relation 56190. Up to 24576 conditions per place. [2023-08-26 15:40:34,913 INFO L119 LiptonReduction]: Number of co-enabled transitions 170280 [2023-08-26 15:40:38,244 INFO L134 LiptonReduction]: Checked pairs total: 481148 [2023-08-26 15:40:38,244 INFO L136 LiptonReduction]: Total number of compositions: 278 [2023-08-26 15:40:38,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:40:38,245 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:40:38,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:40:38,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:40:38,417 INFO L124 PetriNetUnfolderBase]: 586/2048 cut-off events. [2023-08-26 15:40:38,417 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-26 15:40:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:40:38,417 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 15:40:38,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:40:38,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:40:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1422185018, now seen corresponding path program 1 times [2023-08-26 15:40:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:40:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665590450] [2023-08-26 15:40:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:40:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:40:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:40:38,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:40:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:40:38,488 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:40:38,489 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:40:38,489 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:40:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:40:38,489 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:40:38,490 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:40:38,490 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:40:38,490 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-26 15:40:38,525 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-26 15:40:38,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 497 transitions, 1254 flow [2023-08-26 15:41:33,019 INFO L124 PetriNetUnfolderBase]: 53410/185273 cut-off events. [2023-08-26 15:41:33,019 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:41:44,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238652 conditions, 185273 events. 53410/185273 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 2707583 event pairs, 36879 based on Foata normal form. 0/152301 useless extension candidates. Maximal degree in co-relation 115666. Up to 53248 conditions per place. [2023-08-26 15:41:44,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 497 transitions, 1254 flow [2023-08-26 15:41:48,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 427 places, 497 transitions, 1254 flow [2023-08-26 15:41:48,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:41:48,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 427 places, 497 transitions, 1254 flow [2023-08-26 15:41:48,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 427 places, 497 transitions, 1254 flow [2023-08-26 15:41:48,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 497 transitions, 1254 flow [2023-08-26 15:42:41,434 INFO L124 PetriNetUnfolderBase]: 53410/185273 cut-off events. [2023-08-26 15:42:41,434 INFO L125 PetriNetUnfolderBase]: For 53690/53690 co-relation queries the response was YES. [2023-08-26 15:42:52,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238652 conditions, 185273 events. 53410/185273 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 4208. Compared 2707583 event pairs, 36879 based on Foata normal form. 0/152301 useless extension candidates. Maximal degree in co-relation 115666. Up to 53248 conditions per place. [2023-08-26 15:43:11,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 197340 [2023-08-26 15:43:14,780 INFO L134 LiptonReduction]: Checked pairs total: 495487 [2023-08-26 15:43:14,780 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-26 15:43:14,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:43:14,782 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;@81ca8db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:43:14,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 15:43:15,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:43:15,062 INFO L124 PetriNetUnfolderBase]: 926/2959 cut-off events. [2023-08-26 15:43:15,062 INFO L125 PetriNetUnfolderBase]: For 1672/1672 co-relation queries the response was YES. [2023-08-26 15:43:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:43:15,062 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:43:15,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 15:43:15,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:43:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1682449699, now seen corresponding path program 1 times [2023-08-26 15:43:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:43:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798609578] [2023-08-26 15:43:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:43:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:43:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:43:15,089 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 15:43:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 15:43:15,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 15:43:15,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 15:43:15,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 15:43:15,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:43:15,114 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:43:15,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-26 15:43:15,115 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 15:43:15,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-26 15:43:15,149 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-08-26 15:43:15,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 454 places, 529 transitions, 1352 flow