/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:06:08,360 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:06:08,436 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:06:08,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:06:08,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:06:08,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:06:08,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:06:08,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:06:08,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:06:08,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:06:08,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:06:08,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:06:08,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:06:08,477 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:06:08,477 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:06:08,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:06:08,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:06:08,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:06:08,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:06:08,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:06:08,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:06:08,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:06:08,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:06:08,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:06:08,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:06:08,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:06:08,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:06:08,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:06:08,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:06:08,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:06:08,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:08,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:06:08,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:06:08,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:06:08,485 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:06:08,485 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:06:08,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:06:08,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:06:08,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:06:08,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:06:08,729 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:06:08,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-subst.wvr_bound2.c [2023-08-04 02:06:09,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:06:10,106 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:06:10,107 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-subst.wvr_bound2.c [2023-08-04 02:06:10,114 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2570627c/27c4f53b304a415ebab8a4212d602117/FLAG953de6491 [2023-08-04 02:06:10,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2570627c/27c4f53b304a415ebab8a4212d602117 [2023-08-04 02:06:10,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:06:10,128 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:06:10,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:10,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:06:10,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:06:10,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6da43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10, skipping insertion in model container [2023-08-04 02:06:10,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,169 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:06:10,376 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-subst.wvr_bound2.c[5079,5092] [2023-08-04 02:06:10,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:10,397 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:06:10,441 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-subst.wvr_bound2.c[5079,5092] [2023-08-04 02:06:10,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:10,455 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:06:10,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10 WrapperNode [2023-08-04 02:06:10,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:10,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:10,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:06:10,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:06:10,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,498 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 364 [2023-08-04 02:06:10,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:10,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:06:10,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:06:10,499 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:06:10,506 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,510 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:06:10,531 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:06:10,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:06:10,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:06:10,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (1/1) ... [2023-08-04 02:06:10,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:10,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:10,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:06:10,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:06:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:06:10,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:06:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:06:10,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:06:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:06:10,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:06:10,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:06:10,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:06:10,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:06:10,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:06:10,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:06:10,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:06:10,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:06:10,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:06:10,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:06:10,626 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:06:10,729 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:06:10,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:06:11,186 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:06:11,198 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:06:11,198 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 02:06:11,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:11 BoogieIcfgContainer [2023-08-04 02:06:11,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:06:11,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:06:11,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:06:11,205 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:06:11,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:06:10" (1/3) ... [2023-08-04 02:06:11,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aada423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:11, skipping insertion in model container [2023-08-04 02:06:11,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:10" (2/3) ... [2023-08-04 02:06:11,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aada423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:11, skipping insertion in model container [2023-08-04 02:06:11,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:11" (3/3) ... [2023-08-04 02:06:11,208 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-name-comparator-subst.wvr_bound2.c [2023-08-04 02:06:11,214 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:06:11,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:06:11,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:06:11,223 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:06:11,388 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:06:11,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:11,744 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 02:06:11,745 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:11,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 02:06:11,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:11,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:11,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:11,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:11,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:11,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:12,015 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 02:06:12,016 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:12,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 02:06:12,081 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 02:06:23,038 INFO L134 LiptonReduction]: Checked pairs total: 59343 [2023-08-04 02:06:23,038 INFO L136 LiptonReduction]: Total number of compositions: 437 [2023-08-04 02:06:23,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:06:23,055 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1135d258, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:23,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:06:23,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:23,060 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 02:06:23,060 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:06:23,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:23,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:06:23,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:06:23,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1439586257, now seen corresponding path program 1 times [2023-08-04 02:06:23,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:23,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352679335] [2023-08-04 02:06:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:06:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352679335] [2023-08-04 02:06:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352679335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:23,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:23,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937920953] [2023-08-04 02:06:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:23,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 02:06:23,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:23,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:23,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 02:06:23,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:24,336 INFO L124 PetriNetUnfolderBase]: 6178/9027 cut-off events. [2023-08-04 02:06:24,336 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-04 02:06:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18196 conditions, 9027 events. 6178/9027 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46648 event pairs, 4648 based on Foata normal form. 0/6915 useless extension candidates. Maximal degree in co-relation 15113. Up to 8696 conditions per place. [2023-08-04 02:06:24,361 INFO L140 encePairwiseOnDemand]: 841/845 looper letters, 28 selfloop transitions, 2 changer transitions 22/55 dead transitions. [2023-08-04 02:06:24,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 250 flow [2023-08-04 02:06:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1149 transitions. [2023-08-04 02:06:24,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532544378698225 [2023-08-04 02:06:24,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1149 transitions. [2023-08-04 02:06:24,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1149 transitions. [2023-08-04 02:06:24,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:24,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1149 transitions. [2023-08-04 02:06:24,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:24,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:24,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:24,405 INFO L175 Difference]: Start difference. First operand has 49 places, 55 transitions, 152 flow. Second operand 3 states and 1149 transitions. [2023-08-04 02:06:24,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 250 flow [2023-08-04 02:06:24,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:06:24,414 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 91 flow [2023-08-04 02:06:24,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-04 02:06:24,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 02:06:24,420 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 91 flow [2023-08-04 02:06:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:24,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:24,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:24,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:06:24,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:06:24,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash -399556154, now seen corresponding path program 1 times [2023-08-04 02:06:24,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377005511] [2023-08-04 02:06:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:06:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377005511] [2023-08-04 02:06:24,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377005511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715330146] [2023-08-04 02:06:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:24,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:24,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:06:24,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:06:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:24,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:06:24,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:06:24,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:06:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715330146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:24,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:06:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832239458] [2023-08-04 02:06:24,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:06:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:06:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:06:24,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 845 [2023-08-04 02:06:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 33 transitions, 91 flow. Second operand has 8 states, 8 states have (on average 365.5) internal successors, (2924), 8 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 845 [2023-08-04 02:06:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:25,063 INFO L124 PetriNetUnfolderBase]: 1579/2372 cut-off events. [2023-08-04 02:06:25,064 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 02:06:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4844 conditions, 2372 events. 1579/2372 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10202 event pairs, 1228 based on Foata normal form. 0/1979 useless extension candidates. Maximal degree in co-relation 4830. Up to 2312 conditions per place. [2023-08-04 02:06:25,077 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 28 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-08-04 02:06:25,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 163 flow [2023-08-04 02:06:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:06:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:06:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1854 transitions. [2023-08-04 02:06:25,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43881656804733726 [2023-08-04 02:06:25,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1854 transitions. [2023-08-04 02:06:25,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1854 transitions. [2023-08-04 02:06:25,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:25,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1854 transitions. [2023-08-04 02:06:25,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 370.8) internal successors, (1854), 5 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:25,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 845.0) internal successors, (5070), 6 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:25,102 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 845.0) internal successors, (5070), 6 states have internal predecessors, (5070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:25,102 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 91 flow. Second operand 5 states and 1854 transitions. [2023-08-04 02:06:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 163 flow [2023-08-04 02:06:25,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 159 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:06:25,104 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 113 flow [2023-08-04 02:06:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-04 02:06:25,105 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-08-04 02:06:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 113 flow [2023-08-04 02:06:25,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 365.5) internal successors, (2924), 8 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:25,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:25,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-04 02:06:25,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:06:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:25,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:06:25,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 532272934, now seen corresponding path program 2 times [2023-08-04 02:06:25,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:25,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476781634] [2023-08-04 02:06:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:25,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:25,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:06:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:25,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:06:25,398 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:06:25,399 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:06:25,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:06:25,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:06:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:06:25,402 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-04 02:06:25,403 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:06:25,404 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:06:25,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:06:25,476 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:06:25,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:27,038 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 02:06:27,038 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:06:27,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6258 conditions, 5584 events. 1020/5584 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 50942 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3412. Up to 192 conditions per place. [2023-08-04 02:06:27,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:27,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:27,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:27,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:27,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:27,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:28,638 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 02:06:28,639 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:06:28,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6258 conditions, 5584 events. 1020/5584 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 50942 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3412. Up to 192 conditions per place. [2023-08-04 02:06:29,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 185220 [2023-08-04 02:06:39,866 INFO L134 LiptonReduction]: Checked pairs total: 551459 [2023-08-04 02:06:39,866 INFO L136 LiptonReduction]: Total number of compositions: 566 [2023-08-04 02:06:39,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:06:39,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1135d258, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:39,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:06:39,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:39,881 INFO L124 PetriNetUnfolderBase]: 9/145 cut-off events. [2023-08-04 02:06:39,882 INFO L125 PetriNetUnfolderBase]: For 12/14 co-relation queries the response was YES. [2023-08-04 02:06:39,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:39,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:06:39,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:06:39,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1408095528, now seen corresponding path program 1 times [2023-08-04 02:06:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:39,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912437930] [2023-08-04 02:06:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:39,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:06:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912437930] [2023-08-04 02:06:39,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912437930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:39,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398020689] [2023-08-04 02:06:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:39,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1175 [2023-08-04 02:06:39,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 541.0) internal successors, (1623), 3 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:06:39,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:39,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1175 [2023-08-04 02:06:39,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand