/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-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:06:42,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:06:42,522 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:06:42,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:06:42,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:06:42,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:06:42,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:06:42,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:06:42,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:06:42,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:06:42,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:06:42,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:06:42,542 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:06:42,543 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:06:42,543 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:06:42,543 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:06:42,543 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:06:42,544 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:06:42,544 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:06:42,544 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:06:42,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:06:42,545 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:06:42,545 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:06:42,545 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:06:42,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:06:42,546 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:06:42,546 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:06:42,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:06:42,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:06:42,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:06:42,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:42,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:06:42,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:06:42,548 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:06:42,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:06:42,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:06:42,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:06:42,548 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:06:42,549 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:06:42,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:06:42,549 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:06:42,553 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:06:42,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:06:42,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:06:42,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:06:42,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:06:42,713 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:06:42,714 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 02:06:43,790 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:06:43,968 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:06:43,969 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 02:06:43,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e9aca4d/09c76ebab7ee4299aa72f14532fd88c6/FLAG08c044c4e [2023-08-04 02:06:43,997 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e9aca4d/09c76ebab7ee4299aa72f14532fd88c6 [2023-08-04 02:06:44,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:06:44,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:06:44,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:44,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:06:44,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:06:44,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:43" (1/1) ... [2023-08-04 02:06:44,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d28068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44, skipping insertion in model container [2023-08-04 02:06:44,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:06:43" (1/1) ... [2023-08-04 02:06:44,041 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:06:44,190 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-trans.wvr_bound2.c[5031,5044] [2023-08-04 02:06:44,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:44,201 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:06:44,222 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-trans.wvr_bound2.c[5031,5044] [2023-08-04 02:06:44,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:06:44,236 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:06:44,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44 WrapperNode [2023-08-04 02:06:44,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:06:44,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:44,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:06:44,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:06:44,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,271 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 364 [2023-08-04 02:06:44,271 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:06:44,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:06:44,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:06:44,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:06:44,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,295 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:06:44,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:06:44,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:06:44,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:06:44,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (1/1) ... [2023-08-04 02:06:44,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:06:44,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:44,327 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 02:06:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:06:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:06:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:06:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:06:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:06:44,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:06:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:06:44,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:06:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:06:44,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:06:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:06:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:06:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:06:44,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:06:44,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:06:44,331 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 02:06:44,362 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 02:06:44,477 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:06:44,478 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:06:44,853 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:06:44,864 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:06:44,864 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 02:06:44,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:44 BoogieIcfgContainer [2023-08-04 02:06:44,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:06:44,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:06:44,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:06:44,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:06:44,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:06:43" (1/3) ... [2023-08-04 02:06:44,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413241b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:44, skipping insertion in model container [2023-08-04 02:06:44,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:06:44" (2/3) ... [2023-08-04 02:06:44,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413241b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:06:44, skipping insertion in model container [2023-08-04 02:06:44,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:06:44" (3/3) ... [2023-08-04 02:06:44,874 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 02:06:44,881 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:06:44,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:06:44,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:06:44,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:06:45,002 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:06:45,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,419 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 02:06:45,419 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:45,444 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 02:06:45,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:45,477 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 02:06:45,681 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 02:06:45,682 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 02:06:45,695 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 02:06:45,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 02:06:55,141 INFO L134 LiptonReduction]: Checked pairs total: 59343 [2023-08-04 02:06:55,142 INFO L136 LiptonReduction]: Total number of compositions: 437 [2023-08-04 02:06:55,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:06:55,157 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;@704484eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:06:55,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:06:55,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:06:55,162 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 02:06:55,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:06:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:55,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:06:55,163 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 02:06:55,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1439586257, now seen corresponding path program 1 times [2023-08-04 02:06:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:55,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947910342] [2023-08-04 02:06:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:55,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:55,401 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 02:06:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:55,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947910342] [2023-08-04 02:06:55,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947910342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:06:55,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:06:55,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:06:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445466365] [2023-08-04 02:06:55,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:06:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:06:55,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:06:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:06:55,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 02:06:55,456 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 02:06:55,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:55,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 02:06:55,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:56,183 INFO L124 PetriNetUnfolderBase]: 6178/9027 cut-off events. [2023-08-04 02:06:56,183 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-04 02:06:56,193 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 02:06:56,209 INFO L140 encePairwiseOnDemand]: 841/845 looper letters, 28 selfloop transitions, 2 changer transitions 22/55 dead transitions. [2023-08-04 02:06:56,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 250 flow [2023-08-04 02:06:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:06:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:06:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1149 transitions. [2023-08-04 02:06:56,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532544378698225 [2023-08-04 02:06:56,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1149 transitions. [2023-08-04 02:06:56,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1149 transitions. [2023-08-04 02:06:56,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:56,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1149 transitions. [2023-08-04 02:06:56,237 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 02:06:56,243 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 02:06:56,245 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 02:06:56,246 INFO L175 Difference]: Start difference. First operand has 49 places, 55 transitions, 152 flow. Second operand 3 states and 1149 transitions. [2023-08-04 02:06:56,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 250 flow [2023-08-04 02:06:56,253 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 02:06:56,254 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 91 flow [2023-08-04 02:06:56,256 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 02:06:56,260 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 02:06:56,260 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 91 flow [2023-08-04 02:06:56,261 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 02:06:56,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:56,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:06:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:06:56,262 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 02:06:56,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash -399556154, now seen corresponding path program 1 times [2023-08-04 02:06:56,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:56,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062718390] [2023-08-04 02:06:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:56,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:56,365 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 02:06:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:06:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062718390] [2023-08-04 02:06:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062718390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:06:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598165388] [2023-08-04 02:06:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:06:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:06:56,383 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 02:06:56,389 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 02:06:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:06:56,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:06:56,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:06:56,514 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 02:06:56,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:06:56,530 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 02:06:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598165388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:06:56,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:06:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:06:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599570411] [2023-08-04 02:06:56,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:06:56,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:06:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:06:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:06:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:06:56,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 845 [2023-08-04 02:06:56,573 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 02:06:56,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:06:56,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 845 [2023-08-04 02:06:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:56,773 INFO L124 PetriNetUnfolderBase]: 1579/2372 cut-off events. [2023-08-04 02:06:56,774 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 02:06:56,776 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 02:06:56,783 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 28 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-08-04 02:06:56,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 163 flow [2023-08-04 02:06:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:06:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:06:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1854 transitions. [2023-08-04 02:06:56,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43881656804733726 [2023-08-04 02:06:56,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1854 transitions. [2023-08-04 02:06:56,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1854 transitions. [2023-08-04 02:06:56,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:56,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1854 transitions. [2023-08-04 02:06:56,792 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 02:06:56,797 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 02:06:56,798 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 02:06:56,798 INFO L175 Difference]: Start difference. First operand has 51 places, 33 transitions, 91 flow. Second operand 5 states and 1854 transitions. [2023-08-04 02:06:56,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 163 flow [2023-08-04 02:06:56,799 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 02:06:56,800 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 113 flow [2023-08-04 02:06:56,800 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 02:06:56,800 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -6 predicate places. [2023-08-04 02:06:56,800 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 113 flow [2023-08-04 02:06:56,802 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 02:06:56,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:06:56,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-04 02:06:56,809 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 02:06:57,007 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 02:06:57,007 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 02:06:57,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:06:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 532272934, now seen corresponding path program 2 times [2023-08-04 02:06:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:06:57,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834679594] [2023-08-04 02:06:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:06:57,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:06:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:57,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:06:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:06:57,059 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:06:57,059 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:06:57,060 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:06:57,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:06:57,061 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:06:57,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:06:57,062 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-04 02:06:57,063 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:06:57,063 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:06:57,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:06:57,107 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:06:57,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:58,729 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 02:06:58,729 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:06:58,817 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 02:06:58,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:58,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:58,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:06:58,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:58,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 02:06:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 02:07:00,006 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 02:07:00,007 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:07:00,111 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 02:07:00,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 185220 [2023-08-04 02:07:09,915 INFO L134 LiptonReduction]: Checked pairs total: 551459 [2023-08-04 02:07:09,915 INFO L136 LiptonReduction]: Total number of compositions: 566 [2023-08-04 02:07:09,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:07:09,917 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;@704484eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:07:09,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:07:09,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:07:09,926 INFO L124 PetriNetUnfolderBase]: 9/145 cut-off events. [2023-08-04 02:07:09,927 INFO L125 PetriNetUnfolderBase]: For 12/14 co-relation queries the response was YES. [2023-08-04 02:07:09,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:09,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:07:09,928 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 02:07:09,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1408095528, now seen corresponding path program 1 times [2023-08-04 02:07:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830585575] [2023-08-04 02:07:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:10,011 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 02:07:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830585575] [2023-08-04 02:07:10,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830585575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:10,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:10,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:07:10,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738822352] [2023-08-04 02:07:10,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:10,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1175 [2023-08-04 02:07:10,027 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 02:07:10,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:10,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1175 [2023-08-04 02:07:10,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand