/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:30:51,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:30:51,575 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:30:51,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:30:51,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:30:51,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:30:51,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:30:51,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:30:51,598 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:30:51,598 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:30:51,599 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:30:51,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:30:51,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:30:51,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:30:51,600 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:30:51,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:30:51,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:30:51,605 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:30:51,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:30:51,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:30:51,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:30:51,609 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:30:51,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:30:51,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:30:51,610 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:30:51,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:30:51,610 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:30:51,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:30:51,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:30:51,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:30:51,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:30:51,612 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:30:51,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:30:51,612 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:30:51,612 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:30:51,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:30:51,612 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:30:51,613 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:30:51,613 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:30:51,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:30:51,613 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:30:51,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:30:51,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:30:51,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:30:51,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:30:51,844 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:30:51,844 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:30:51,845 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 18:30:53,017 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:30:53,231 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:30:53,232 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 18:30:53,246 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c16820d/6333c09754b946a4a6bf38845f15dda0/FLAG2ca8ce93a [2023-08-03 18:30:53,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c16820d/6333c09754b946a4a6bf38845f15dda0 [2023-08-03 18:30:53,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:30:53,266 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:30:53,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:30:53,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:30:53,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:30:53,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c350be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53, skipping insertion in model container [2023-08-03 18:30:53,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,336 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:30:53,454 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-03 18:30:53,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:30:53,618 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:30:53,634 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-03 18:30:53,651 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:30:53,653 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:30:53,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:30:53,717 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:30:53,717 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:30:53,723 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:30:53,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53 WrapperNode [2023-08-03 18:30:53,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:30:53,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:30:53,724 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:30:53,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:30:53,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,764 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2023-08-03 18:30:53,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:30:53,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:30:53,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:30:53,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:30:53,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,778 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,778 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,801 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:30:53,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:30:53,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:30:53,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:30:53,811 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (1/1) ... [2023-08-03 18:30:53,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:30:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:30:53,838 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) [2023-08-03 18:30:53,844 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 [2023-08-03 18:30:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:30:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:30:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:30:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:30:53,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:30:53,868 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:30:53,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:30:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:30:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:30:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:30:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:30:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 18:30:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 18:30:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:30:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:30:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:30:53,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:30:53,871 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:30:54,021 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:30:54,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:30:54,237 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:30:54,243 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:30:54,243 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 18:30:54,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:30:54 BoogieIcfgContainer [2023-08-03 18:30:54,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:30:54,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:30:54,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:30:54,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:30:54,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:30:53" (1/3) ... [2023-08-03 18:30:54,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b7892d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:30:54, skipping insertion in model container [2023-08-03 18:30:54,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:30:53" (2/3) ... [2023-08-03 18:30:54,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b7892d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:30:54, skipping insertion in model container [2023-08-03 18:30:54,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:30:54" (3/3) ... [2023-08-03 18:30:54,253 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 18:30:54,259 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:30:54,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:30:54,268 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:30:54,268 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:30:54,318 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:30:54,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 126 transitions, 272 flow [2023-08-03 18:30:54,518 INFO L124 PetriNetUnfolderBase]: 62/859 cut-off events. [2023-08-03 18:30:54,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:30:54,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 859 events. 62/859 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5307 event pairs, 0 based on Foata normal form. 0/751 useless extension candidates. Maximal degree in co-relation 512. Up to 32 conditions per place. [2023-08-03 18:30:54,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 126 transitions, 272 flow [2023-08-03 18:30:54,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 112 transitions, 244 flow [2023-08-03 18:30:54,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:30:54,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 112 transitions, 244 flow [2023-08-03 18:30:54,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 112 transitions, 244 flow [2023-08-03 18:30:54,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 112 transitions, 244 flow [2023-08-03 18:30:54,608 INFO L124 PetriNetUnfolderBase]: 46/635 cut-off events. [2023-08-03 18:30:54,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:30:54,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 635 events. 46/635 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3545 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 400. Up to 32 conditions per place. [2023-08-03 18:30:54,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 2526 [2023-08-03 18:30:56,735 INFO L134 LiptonReduction]: Checked pairs total: 3745 [2023-08-03 18:30:56,735 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 18:30:56,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:30:56,752 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;@61bba795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:30:56,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 18:30:56,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:30:56,756 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-08-03 18:30:56,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:30:56,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:30:56,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 18:30:56,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:30:56,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:30:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash 114673452, now seen corresponding path program 1 times [2023-08-03 18:30:56,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:30:56,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771652659] [2023-08-03 18:30:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:30:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:30:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:30:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:30:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:30:56,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771652659] [2023-08-03 18:30:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771652659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:30:56,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:30:56,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:30:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953525706] [2023-08-03 18:30:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:30:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:30:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:30:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:30:57,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:30:57,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 215 [2023-08-03 18:30:57,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2023-08-03 18:30:57,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:30:57,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 215 [2023-08-03 18:30:57,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:30:57,414 INFO L124 PetriNetUnfolderBase]: 2144/3322 cut-off events. [2023-08-03 18:30:57,414 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-03 18:30:57,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6768 conditions, 3322 events. 2144/3322 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18273 event pairs, 1782 based on Foata normal form. 0/3055 useless extension candidates. Maximal degree in co-relation 6750. Up to 3228 conditions per place. [2023-08-03 18:30:57,438 INFO L140 encePairwiseOnDemand]: 211/215 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-03 18:30:57,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 148 flow [2023-08-03 18:30:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:30:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:30:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 18:30:57,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643410852713179 [2023-08-03 18:30:57,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 18:30:57,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 18:30:57,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:30:57,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 18:30:57,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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) [2023-08-03 18:30:57,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 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) [2023-08-03 18:30:57,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 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) [2023-08-03 18:30:57,475 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 86 flow. Second operand 3 states and 364 transitions. [2023-08-03 18:30:57,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 148 flow [2023-08-03 18:30:57,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:30:57,480 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 92 flow [2023-08-03 18:30:57,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-03 18:30:57,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-03 18:30:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 92 flow [2023-08-03 18:30:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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) [2023-08-03 18:30:57,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:30:57,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:30:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:30:57,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:30:57,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:30:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 106878043, now seen corresponding path program 1 times [2023-08-03 18:30:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:30:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311249996] [2023-08-03 18:30:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:30:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:30:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:30:57,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:30:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:30:57,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:30:57,568 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:30:57,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-03 18:30:57,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-03 18:30:57,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-03 18:30:57,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-03 18:30:57,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-03 18:30:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:30:57,574 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:30:57,577 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:30:57,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:30:57,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:30:57,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 352 flow [2023-08-03 18:30:58,062 INFO L124 PetriNetUnfolderBase]: 282/4024 cut-off events. [2023-08-03 18:30:58,063 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 18:30:58,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 4024 events. 282/4024 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38240 event pairs, 0 based on Foata normal form. 0/3541 useless extension candidates. Maximal degree in co-relation 2927. Up to 162 conditions per place. [2023-08-03 18:30:58,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 352 flow [2023-08-03 18:30:58,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 138 transitions, 324 flow [2023-08-03 18:30:58,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:30:58,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 138 transitions, 324 flow [2023-08-03 18:30:58,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 138 transitions, 324 flow [2023-08-03 18:30:58,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 138 transitions, 324 flow [2023-08-03 18:30:58,411 INFO L124 PetriNetUnfolderBase]: 201/2890 cut-off events. [2023-08-03 18:30:58,412 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 18:30:58,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 2890 events. 201/2890 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 25393 event pairs, 0 based on Foata normal form. 0/2569 useless extension candidates. Maximal degree in co-relation 2171. Up to 162 conditions per place. [2023-08-03 18:30:58,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 6200 [2023-08-03 18:31:00,436 INFO L134 LiptonReduction]: Checked pairs total: 11213 [2023-08-03 18:31:00,436 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-03 18:31:00,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:31:00,439 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;@61bba795, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:31:00,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 18:31:00,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:31:00,442 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-03 18:31:00,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:31:00,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:31:00,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 18:31:00,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:31:00,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:31:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash -425639733, now seen corresponding path program 1 times [2023-08-03 18:31:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:31:00,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237053330] [2023-08-03 18:31:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:31:00,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:31:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:31:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:31:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:31:00,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237053330] [2023-08-03 18:31:00,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237053330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:31:00,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:31:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:31:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915920525] [2023-08-03 18:31:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:31:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:31:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:31:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:31:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:31:00,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 246 [2023-08-03 18:31:00,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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) [2023-08-03 18:31:00,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:31:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 246 [2023-08-03 18:31:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:31:48,483 INFO L124 PetriNetUnfolderBase]: 576290/737070 cut-off events. [2023-08-03 18:31:48,483 INFO L125 PetriNetUnfolderBase]: For 26316/26316 co-relation queries the response was YES. [2023-08-03 18:31:50,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486717 conditions, 737070 events. 576290/737070 cut-off events. For 26316/26316 co-relation queries the response was YES. Maximal size of possible extension queue 16098. Compared 4995890 event pairs, 485484 based on Foata normal form. 0/706149 useless extension candidates. Maximal degree in co-relation 436515. Up to 712500 conditions per place. [2023-08-03 18:31:54,150 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 40 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-03 18:31:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 240 flow [2023-08-03 18:31:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:31:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:31:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-03 18:31:54,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2023-08-03 18:31:54,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-03 18:31:54,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-03 18:31:54,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:31:54,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-03 18:31:54,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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) [2023-08-03 18:31:54,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:31:54,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:31:54,157 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 148 flow. Second operand 3 states and 442 transitions. [2023-08-03 18:31:54,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 240 flow [2023-08-03 18:31:54,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 54 transitions, 232 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-03 18:31:54,209 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 152 flow [2023-08-03 18:31:54,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-03 18:31:54,210 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-03 18:31:54,210 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 152 flow [2023-08-03 18:31:54,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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) [2023-08-03 18:31:54,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:31:54,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:31:54,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:31:54,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:31:54,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:31:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1151361656, now seen corresponding path program 1 times [2023-08-03 18:31:54,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:31:54,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555547260] [2023-08-03 18:31:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:31:54,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:31:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:31:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:31:54,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:31:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555547260] [2023-08-03 18:31:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555547260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:31:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811582646] [2023-08-03 18:31:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:31:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:31:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:31:54,279 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) [2023-08-03 18:31:54,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:31:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:31:54,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:31:54,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:31:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:31:54,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:31:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811582646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:31:54,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:31:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:31:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012851837] [2023-08-03 18:31:54,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:31:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:31:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:31:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:31:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:31:54,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 246 [2023-08-03 18:31:54,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2023-08-03 18:31:54,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:31:54,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 246 [2023-08-03 18:31:54,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:32:40,578 INFO L124 PetriNetUnfolderBase]: 543278/694616 cut-off events. [2023-08-03 18:32:40,579 INFO L125 PetriNetUnfolderBase]: For 17847/17847 co-relation queries the response was YES. [2023-08-03 18:32:43,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389522 conditions, 694616 events. 543278/694616 cut-off events. For 17847/17847 co-relation queries the response was YES. Maximal size of possible extension queue 15719. Compared 4656606 event pairs, 459424 based on Foata normal form. 0/660056 useless extension candidates. Maximal degree in co-relation 1389483. Up to 668923 conditions per place. [2023-08-03 18:32:45,935 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 18:32:45,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 262 flow [2023-08-03 18:32:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:32:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:32:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-03 18:32:45,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2023-08-03 18:32:45,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-03 18:32:45,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-03 18:32:45,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:32:45,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-03 18:32:45,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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) [2023-08-03 18:32:45,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:32:45,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:32:45,942 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 152 flow. Second operand 3 states and 446 transitions. [2023-08-03 18:32:45,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 262 flow [2023-08-03 18:32:45,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:32:45,949 INFO L231 Difference]: Finished difference. Result has 72 places, 52 transitions, 162 flow [2023-08-03 18:32:45,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2023-08-03 18:32:45,950 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-03 18:32:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 162 flow [2023-08-03 18:32:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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) [2023-08-03 18:32:45,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:32:45,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:32:45,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 18:32:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:32:46,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:32:46,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:32:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1016657793, now seen corresponding path program 1 times [2023-08-03 18:32:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:32:46,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680637107] [2023-08-03 18:32:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:32:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:32:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:32:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:32:46,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:32:46,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680637107] [2023-08-03 18:32:46,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680637107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:32:46,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060523150] [2023-08-03 18:32:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:32:46,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:32:46,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:32:46,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:32:46,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:32:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:32:46,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:32:46,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:32:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:32:46,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:32:46,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060523150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:32:46,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:32:46,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:32:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727758718] [2023-08-03 18:32:46,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:32:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:32:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:32:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:32:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:32:46,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:32:46,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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) [2023-08-03 18:32:46,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:32:46,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:32:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:33:33,066 INFO L124 PetriNetUnfolderBase]: 543266/694575 cut-off events. [2023-08-03 18:33:33,066 INFO L125 PetriNetUnfolderBase]: For 18135/18135 co-relation queries the response was YES. [2023-08-03 18:33:35,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389791 conditions, 694575 events. 543266/694575 cut-off events. For 18135/18135 co-relation queries the response was YES. Maximal size of possible extension queue 15811. Compared 4656963 event pairs, 396552 based on Foata normal form. 9/660168 useless extension candidates. Maximal degree in co-relation 412162. Up to 669001 conditions per place. [2023-08-03 18:33:38,249 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 44 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-03 18:33:38,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 59 transitions, 275 flow [2023-08-03 18:33:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:33:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:33:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-08-03 18:33:38,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2023-08-03 18:33:38,252 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-08-03 18:33:38,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-08-03 18:33:38,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:33:38,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-08-03 18:33:38,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 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) [2023-08-03 18:33:38,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:33:38,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:33:38,258 INFO L175 Difference]: Start difference. First operand has 72 places, 52 transitions, 162 flow. Second operand 5 states and 708 transitions. [2023-08-03 18:33:38,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 59 transitions, 275 flow [2023-08-03 18:33:38,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 59 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:33:38,260 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 178 flow [2023-08-03 18:33:38,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2023-08-03 18:33:38,261 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-03 18:33:38,261 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 178 flow [2023-08-03 18:33:38,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 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) [2023-08-03 18:33:38,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:33:38,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:33:38,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 18:33:38,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:33:38,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:33:38,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:33:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1929095225, now seen corresponding path program 1 times [2023-08-03 18:33:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:33:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852051197] [2023-08-03 18:33:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:33:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:33:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:33:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:33:38,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:33:38,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852051197] [2023-08-03 18:33:38,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852051197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:33:38,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680494049] [2023-08-03 18:33:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:33:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:33:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:33:38,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:33:38,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:33:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:33:38,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:33:38,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:33:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:33:38,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:33:38,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680494049] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:33:38,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:33:38,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:33:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101265703] [2023-08-03 18:33:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:33:38,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:33:38,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:33:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:33:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:33:38,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 246 [2023-08-03 18:33:38,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2023-08-03 18:33:38,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:33:38,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 246 [2023-08-03 18:33:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:34:23,853 INFO L124 PetriNetUnfolderBase]: 512834/647048 cut-off events. [2023-08-03 18:34:23,853 INFO L125 PetriNetUnfolderBase]: For 15577/15577 co-relation queries the response was YES. [2023-08-03 18:34:26,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303198 conditions, 647048 events. 512834/647048 cut-off events. For 15577/15577 co-relation queries the response was YES. Maximal size of possible extension queue 15402. Compared 4210292 event pairs, 434258 based on Foata normal form. 0/619256 useless extension candidates. Maximal degree in co-relation 385616. Up to 626984 conditions per place. [2023-08-03 18:34:29,047 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 51 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-03 18:34:29,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 308 flow [2023-08-03 18:34:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:34:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:34:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-03 18:34:29,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2023-08-03 18:34:29,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-03 18:34:29,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-03 18:34:29,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:34:29,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-03 18:34:29,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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) [2023-08-03 18:34:29,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:34:29,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:34:29,053 INFO L175 Difference]: Start difference. First operand has 75 places, 52 transitions, 178 flow. Second operand 3 states and 450 transitions. [2023-08-03 18:34:29,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 308 flow [2023-08-03 18:34:29,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 64 transitions, 301 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:34:29,064 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 183 flow [2023-08-03 18:34:29,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2023-08-03 18:34:29,065 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-03 18:34:29,065 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 183 flow [2023-08-03 18:34:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2023-08-03 18:34:29,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:34:29,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:34:29,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 18:34:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:34:29,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:34:29,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:34:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1358523132, now seen corresponding path program 1 times [2023-08-03 18:34:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:34:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886018929] [2023-08-03 18:34:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:34:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:34:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:34:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:34:29,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:34:29,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886018929] [2023-08-03 18:34:29,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886018929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:34:29,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806479506] [2023-08-03 18:34:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:34:29,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:34:29,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:34:29,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:34:29,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 18:34:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:34:29,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:34:29,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:34:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:34:29,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:34:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:34:29,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806479506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:34:29,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:34:29,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:34:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323566987] [2023-08-03 18:34:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:34:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:34:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:34:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:34:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:34:29,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:34:29,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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) [2023-08-03 18:34:29,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:34:29,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:34:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:35:06,037 INFO L124 PetriNetUnfolderBase]: 399196/498755 cut-off events. [2023-08-03 18:35:06,037 INFO L125 PetriNetUnfolderBase]: For 13458/13458 co-relation queries the response was YES. [2023-08-03 18:35:08,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008474 conditions, 498755 events. 399196/498755 cut-off events. For 13458/13458 co-relation queries the response was YES. Maximal size of possible extension queue 12048. Compared 3058418 event pairs, 282654 based on Foata normal form. 3/479858 useless extension candidates. Maximal degree in co-relation 355558. Up to 486586 conditions per place. [2023-08-03 18:35:10,271 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 45 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-03 18:35:10,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 59 transitions, 287 flow [2023-08-03 18:35:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:35:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:35:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2023-08-03 18:35:10,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584349593495935 [2023-08-03 18:35:10,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2023-08-03 18:35:10,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2023-08-03 18:35:10,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:35:10,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2023-08-03 18:35:10,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 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) [2023-08-03 18:35:10,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:35:10,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:35:10,278 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 183 flow. Second operand 4 states and 575 transitions. [2023-08-03 18:35:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 59 transitions, 287 flow [2023-08-03 18:35:10,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 59 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:35:10,282 INFO L231 Difference]: Finished difference. Result has 78 places, 52 transitions, 179 flow [2023-08-03 18:35:10,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=78, PETRI_TRANSITIONS=52} [2023-08-03 18:35:10,283 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2023-08-03 18:35:10,283 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 52 transitions, 179 flow [2023-08-03 18:35:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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) [2023-08-03 18:35:10,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:35:10,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:35:10,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 18:35:10,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:35:10,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:35:10,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:35:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash -709161968, now seen corresponding path program 1 times [2023-08-03 18:35:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:35:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126206145] [2023-08-03 18:35:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:10,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:35:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:35:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:35:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126206145] [2023-08-03 18:35:10,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126206145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:35:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415464770] [2023-08-03 18:35:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:10,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:35:10,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:35:10,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:35:10,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 18:35:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:10,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:35:10,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:35:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:35:10,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:35:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415464770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:35:10,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:35:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:35:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203576373] [2023-08-03 18:35:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:35:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:35:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:35:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:35:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:35:10,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:35:10,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 52 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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) [2023-08-03 18:35:10,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:35:10,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:35:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:35:44,805 INFO L124 PetriNetUnfolderBase]: 398980/498463 cut-off events. [2023-08-03 18:35:44,805 INFO L125 PetriNetUnfolderBase]: For 12886/12886 co-relation queries the response was YES. [2023-08-03 18:35:47,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007547 conditions, 498463 events. 398980/498463 cut-off events. For 12886/12886 co-relation queries the response was YES. Maximal size of possible extension queue 12048. Compared 3056691 event pairs, 180814 based on Foata normal form. 81/479644 useless extension candidates. Maximal degree in co-relation 355229. Up to 485757 conditions per place. [2023-08-03 18:35:50,260 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 57 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 18:35:50,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 341 flow [2023-08-03 18:35:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:35:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:35:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-08-03 18:35:50,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2023-08-03 18:35:50,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-08-03 18:35:50,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-08-03 18:35:50,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:35:50,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-08-03 18:35:50,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 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) [2023-08-03 18:35:50,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:35:50,290 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:35:50,290 INFO L175 Difference]: Start difference. First operand has 78 places, 52 transitions, 179 flow. Second operand 5 states and 720 transitions. [2023-08-03 18:35:50,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 341 flow [2023-08-03 18:35:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 334 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:35:50,318 INFO L231 Difference]: Finished difference. Result has 79 places, 52 transitions, 191 flow [2023-08-03 18:35:50,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=79, PETRI_TRANSITIONS=52} [2023-08-03 18:35:50,319 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 12 predicate places. [2023-08-03 18:35:50,320 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 52 transitions, 191 flow [2023-08-03 18:35:50,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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) [2023-08-03 18:35:50,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:35:50,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:35:50,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 18:35:50,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:35:50,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:35:50,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:35:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -477528917, now seen corresponding path program 1 times [2023-08-03 18:35:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:35:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658228459] [2023-08-03 18:35:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:50,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:35:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:35:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:35:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658228459] [2023-08-03 18:35:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658228459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:35:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004776477] [2023-08-03 18:35:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:35:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:35:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:35:50,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:35:50,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 18:35:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:35:50,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:35:50,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:35:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:35:50,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:35:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004776477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:35:50,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:35:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 18:35:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444165655] [2023-08-03 18:35:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:35:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:35:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:35:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:35:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:35:50,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 246 [2023-08-03 18:35:50,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 52 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-08-03 18:35:50,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:35:50,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 246 [2023-08-03 18:35:50,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:36:26,691 INFO L124 PetriNetUnfolderBase]: 389476/486367 cut-off events. [2023-08-03 18:36:26,691 INFO L125 PetriNetUnfolderBase]: For 8110/8110 co-relation queries the response was YES. [2023-08-03 18:36:29,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983712 conditions, 486367 events. 389476/486367 cut-off events. For 8110/8110 co-relation queries the response was YES. Maximal size of possible extension queue 12097. Compared 2952832 event pairs, 316468 based on Foata normal form. 0/469411 useless extension candidates. Maximal degree in co-relation 346709. Up to 443983 conditions per place. [2023-08-03 18:36:31,815 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 56 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-03 18:36:31,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 339 flow [2023-08-03 18:36:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:36:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:36:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-03 18:36:31,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2023-08-03 18:36:31,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-03 18:36:31,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-03 18:36:31,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:36:31,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-03 18:36:31,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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) [2023-08-03 18:36:31,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:36:31,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 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) [2023-08-03 18:36:31,839 INFO L175 Difference]: Start difference. First operand has 79 places, 52 transitions, 191 flow. Second operand 3 states and 454 transitions. [2023-08-03 18:36:31,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 339 flow [2023-08-03 18:36:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 68 transitions, 332 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:36:31,871 INFO L231 Difference]: Finished difference. Result has 80 places, 53 transitions, 196 flow [2023-08-03 18:36:31,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=80, PETRI_TRANSITIONS=53} [2023-08-03 18:36:31,874 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 13 predicate places. [2023-08-03 18:36:31,874 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 53 transitions, 196 flow [2023-08-03 18:36:31,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-08-03 18:36:31,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:36:31,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:36:31,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 18:36:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:36:32,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:36:32,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:36:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1430076749, now seen corresponding path program 1 times [2023-08-03 18:36:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:36:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516047146] [2023-08-03 18:36:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:36:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:36:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:36:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:36:32,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:36:32,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516047146] [2023-08-03 18:36:32,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516047146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:36:32,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299371017] [2023-08-03 18:36:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:36:32,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:36:32,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:36:32,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:36:32,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 18:36:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:36:32,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:36:32,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:36:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:36:32,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:36:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 18:36:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299371017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:36:32,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:36:32,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:36:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639446843] [2023-08-03 18:36:32,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:36:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:36:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:36:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:36:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:36:32,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:36:32,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 53 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 18:36:32,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:36:32,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:36:32,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:36:59,375 INFO L124 PetriNetUnfolderBase]: 302806/375316 cut-off events. [2023-08-03 18:36:59,375 INFO L125 PetriNetUnfolderBase]: For 32992/32992 co-relation queries the response was YES. [2023-08-03 18:37:01,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786334 conditions, 375316 events. 302806/375316 cut-off events. For 32992/32992 co-relation queries the response was YES. Maximal size of possible extension queue 10037. Compared 2179113 event pairs, 217912 based on Foata normal form. 27/374047 useless extension candidates. Maximal degree in co-relation 276224. Up to 365929 conditions per place. [2023-08-03 18:37:04,009 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 54 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-03 18:37:04,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 334 flow [2023-08-03 18:37:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:37:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:37:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2023-08-03 18:37:04,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592479674796748 [2023-08-03 18:37:04,012 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2023-08-03 18:37:04,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2023-08-03 18:37:04,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:37:04,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2023-08-03 18:37:04,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 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) [2023-08-03 18:37:04,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:37:04,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:37:04,016 INFO L175 Difference]: Start difference. First operand has 80 places, 53 transitions, 196 flow. Second operand 4 states and 583 transitions. [2023-08-03 18:37:04,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 334 flow [2023-08-03 18:37:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 67 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:37:04,262 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 192 flow [2023-08-03 18:37:04,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2023-08-03 18:37:04,264 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-08-03 18:37:04,264 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 192 flow [2023-08-03 18:37:04,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 18:37:04,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:37:04,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:37:04,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 18:37:04,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:37:04,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:37:04,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:37:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1044350479, now seen corresponding path program 1 times [2023-08-03 18:37:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:37:04,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778110295] [2023-08-03 18:37:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:37:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:37:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:37:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:37:04,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:37:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778110295] [2023-08-03 18:37:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778110295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:37:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382017880] [2023-08-03 18:37:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:37:04,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:37:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:37:04,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:37:04,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 18:37:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:37:04,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:37:04,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:37:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:37:04,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:37:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382017880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:37:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:37:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:37:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954994642] [2023-08-03 18:37:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:37:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:37:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:37:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:37:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:37:04,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:37:04,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 52 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 18:37:04,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:37:04,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:37:04,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:37:31,219 INFO L124 PetriNetUnfolderBase]: 299890/370294 cut-off events. [2023-08-03 18:37:31,220 INFO L125 PetriNetUnfolderBase]: For 28603/28603 co-relation queries the response was YES. [2023-08-03 18:37:33,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774625 conditions, 370294 events. 299890/370294 cut-off events. For 28603/28603 co-relation queries the response was YES. Maximal size of possible extension queue 10033. Compared 2128752 event pairs, 60832 based on Foata normal form. 729/369970 useless extension candidates. Maximal degree in co-relation 272159. Up to 355185 conditions per place. [2023-08-03 18:37:34,576 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 70 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-03 18:37:34,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 404 flow [2023-08-03 18:37:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:37:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:37:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2023-08-03 18:37:34,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2023-08-03 18:37:34,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2023-08-03 18:37:34,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2023-08-03 18:37:34,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:37:34,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2023-08-03 18:37:34,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 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) [2023-08-03 18:37:34,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:37:34,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:37:34,582 INFO L175 Difference]: Start difference. First operand has 82 places, 52 transitions, 192 flow. Second operand 5 states and 732 transitions. [2023-08-03 18:37:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 404 flow [2023-08-03 18:37:34,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:37:34,760 INFO L231 Difference]: Finished difference. Result has 83 places, 52 transitions, 204 flow [2023-08-03 18:37:34,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=83, PETRI_TRANSITIONS=52} [2023-08-03 18:37:34,761 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 16 predicate places. [2023-08-03 18:37:34,761 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 52 transitions, 204 flow [2023-08-03 18:37:34,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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) [2023-08-03 18:37:34,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:37:34,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:37:34,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 18:37:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 18:37:34,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:37:34,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:37:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2048595713, now seen corresponding path program 1 times [2023-08-03 18:37:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:37:34,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999724362] [2023-08-03 18:37:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:37:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:37:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:37:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:37:35,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:37:35,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999724362] [2023-08-03 18:37:35,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999724362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:37:35,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072276863] [2023-08-03 18:37:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:37:35,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:37:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:37:35,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:37:35,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 18:37:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:37:35,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:37:35,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:37:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:37:35,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:37:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 18:37:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072276863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:37:35,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:37:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:37:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967102579] [2023-08-03 18:37:35,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:37:35,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:37:35,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:37:35,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:37:35,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:37:35,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:37:35,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 52 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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) [2023-08-03 18:37:35,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:37:35,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:37:35,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:37:57,598 INFO L124 PetriNetUnfolderBase]: 234604/288241 cut-off events. [2023-08-03 18:37:57,598 INFO L125 PetriNetUnfolderBase]: For 26818/26818 co-relation queries the response was YES. [2023-08-03 18:37:59,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605219 conditions, 288241 events. 234604/288241 cut-off events. For 26818/26818 co-relation queries the response was YES. Maximal size of possible extension queue 9081. Compared 1620726 event pairs, 168238 based on Foata normal form. 243/287674 useless extension candidates. Maximal degree in co-relation 212342. Up to 275692 conditions per place. [2023-08-03 18:38:00,367 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 62 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-03 18:38:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 372 flow [2023-08-03 18:38:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:38:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:38:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-03 18:38:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2023-08-03 18:38:00,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-03 18:38:00,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-03 18:38:00,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:38:00,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-03 18:38:00,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 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) [2023-08-03 18:38:00,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:38:00,372 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:38:00,373 INFO L175 Difference]: Start difference. First operand has 83 places, 52 transitions, 204 flow. Second operand 4 states and 591 transitions. [2023-08-03 18:38:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 372 flow [2023-08-03 18:38:00,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 367 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:38:00,520 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 195 flow [2023-08-03 18:38:00,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2023-08-03 18:38:00,521 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 17 predicate places. [2023-08-03 18:38:00,521 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 195 flow [2023-08-03 18:38:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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) [2023-08-03 18:38:00,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:38:00,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:38:00,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 18:38:00,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:38:00,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:38:00,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:38:00,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1759015548, now seen corresponding path program 1 times [2023-08-03 18:38:00,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:38:00,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780932414] [2023-08-03 18:38:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:38:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:38:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:38:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:38:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:38:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780932414] [2023-08-03 18:38:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780932414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:38:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799543423] [2023-08-03 18:38:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:38:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:38:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:38:00,791 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:38:00,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 18:38:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:38:00,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:38:00,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:38:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:38:00,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:38:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:38:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799543423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:38:00,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:38:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:38:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180007480] [2023-08-03 18:38:00,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:38:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:38:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:38:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:38:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:38:00,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:38:00,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2023-08-03 18:38:00,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:38:00,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:38:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:38:18,668 INFO L124 PetriNetUnfolderBase]: 214192/263860 cut-off events. [2023-08-03 18:38:18,669 INFO L125 PetriNetUnfolderBase]: For 21310/21310 co-relation queries the response was YES. [2023-08-03 18:38:20,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554108 conditions, 263860 events. 214192/263860 cut-off events. For 21310/21310 co-relation queries the response was YES. Maximal size of possible extension queue 8532. Compared 1448230 event pairs, 91720 based on Foata normal form. 2187/265237 useless extension candidates. Maximal degree in co-relation 194333. Up to 135913 conditions per place. [2023-08-03 18:38:21,204 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 70 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-03 18:38:21,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 407 flow [2023-08-03 18:38:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:38:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:38:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-03 18:38:21,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2023-08-03 18:38:21,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-03 18:38:21,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-03 18:38:21,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:38:21,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-03 18:38:21,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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) [2023-08-03 18:38:21,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:38:21,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 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) [2023-08-03 18:38:21,209 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 195 flow. Second operand 4 states and 600 transitions. [2023-08-03 18:38:21,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 407 flow [2023-08-03 18:38:21,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 83 transitions, 401 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:38:21,262 INFO L231 Difference]: Finished difference. Result has 86 places, 52 transitions, 209 flow [2023-08-03 18:38:21,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=86, PETRI_TRANSITIONS=52} [2023-08-03 18:38:21,263 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-03 18:38:21,263 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 52 transitions, 209 flow [2023-08-03 18:38:21,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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) [2023-08-03 18:38:21,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:38:21,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:38:21,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 18:38:21,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 18:38:21,464 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:38:21,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:38:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1598147241, now seen corresponding path program 1 times [2023-08-03 18:38:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:38:21,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7590991] [2023-08-03 18:38:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:38:21,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:38:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:38:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:38:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:38:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7590991] [2023-08-03 18:38:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7590991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:38:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856809165] [2023-08-03 18:38:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:38:21,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:38:21,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:38:21,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:38:21,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 18:38:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:38:21,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:38:21,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:38:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 18:38:21,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:38:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856809165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:38:21,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:38:21,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:38:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632572382] [2023-08-03 18:38:21,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:38:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:38:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:38:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:38:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:38:21,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 246 [2023-08-03 18:38:21,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 52 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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) [2023-08-03 18:38:21,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:38:21,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 246 [2023-08-03 18:38:21,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:38:36,384 INFO L124 PetriNetUnfolderBase]: 179200/220120 cut-off events. [2023-08-03 18:38:36,384 INFO L125 PetriNetUnfolderBase]: For 64294/64294 co-relation queries the response was YES. [2023-08-03 18:38:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491820 conditions, 220120 events. 179200/220120 cut-off events. For 64294/64294 co-relation queries the response was YES. Maximal size of possible extension queue 6644. Compared 1159939 event pairs, 8614 based on Foata normal form. 6561/225871 useless extension candidates. Maximal degree in co-relation 172112. Up to 124659 conditions per place. [2023-08-03 18:38:38,576 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 82 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-03 18:38:38,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 457 flow [2023-08-03 18:38:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:38:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:38:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 743 transitions. [2023-08-03 18:38:38,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040650406504066 [2023-08-03 18:38:38,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 743 transitions. [2023-08-03 18:38:38,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 743 transitions. [2023-08-03 18:38:38,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:38:38,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 743 transitions. [2023-08-03 18:38:38,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 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) [2023-08-03 18:38:38,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:38:38,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-08-03 18:38:38,582 INFO L175 Difference]: Start difference. First operand has 86 places, 52 transitions, 209 flow. Second operand 5 states and 743 transitions. [2023-08-03 18:38:38,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 457 flow [2023-08-03 18:38:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 18:38:40,013 INFO L231 Difference]: Finished difference. Result has 86 places, 50 transitions, 198 flow [2023-08-03 18:38:40,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=86, PETRI_TRANSITIONS=50} [2023-08-03 18:38:40,014 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-03 18:38:40,014 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 50 transitions, 198 flow [2023-08-03 18:38:40,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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) [2023-08-03 18:38:40,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:38:40,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:38:40,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-03 18:38:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-03 18:38:40,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 18:38:40,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:38:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1598147671, now seen corresponding path program 1 times [2023-08-03 18:38:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:38:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309964417] [2023-08-03 18:38:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:38:40,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:38:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:38:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-03 18:38:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:38:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309964417] [2023-08-03 18:38:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309964417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:38:40,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:38:40,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 18:38:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581825231] [2023-08-03 18:38:40,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:38:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:38:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:38:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:38:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:38:40,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 246 [2023-08-03 18:38:40,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 50 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-03 18:38:40,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:38:40,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 246 [2023-08-03 18:38:40,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-03 18:40:25,343 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 18:40:26,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown