/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:03:49,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:03:49,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:03:49,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:03:49,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:03:49,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:03:49,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:03:49,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:03:49,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:03:49,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:03:49,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:03:49,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:03:49,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:03:49,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:03:49,782 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:03:49,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:03:49,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:03:49,783 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:03:49,783 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:03:49,783 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:03:49,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:03:49,784 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:03:49,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:03:49,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:03:49,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:03:49,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:03:49,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:03:49,785 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:03:49,786 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:03:49,786 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:03:49,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:03:49,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:03:49,787 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:03:49,787 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:03:49,787 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:03:49,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:03:49,788 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:03:50,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:03:50,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:03:50,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:03:50,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:03:50,053 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:03:50,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i [2023-08-04 00:03:51,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:03:51,525 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:03:51,525 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i [2023-08-04 00:03:51,541 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b132212d0/bbea1847194b4b8d9a87afc17e3f70fe/FLAG600175b98 [2023-08-04 00:03:51,553 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b132212d0/bbea1847194b4b8d9a87afc17e3f70fe [2023-08-04 00:03:51,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:03:51,556 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:03:51,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:03:51,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:03:51,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:03:51,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:03:51" (1/1) ... [2023-08-04 00:03:51,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0bcb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:51, skipping insertion in model container [2023-08-04 00:03:51,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:03:51" (1/1) ... [2023-08-04 00:03:51,598 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:03:51,774 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_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i[1019,1032] [2023-08-04 00:03:51,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:03:51,936 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:03:51,946 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_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i[1019,1032] [2023-08-04 00:03:51,955 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:03:51,957 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:03:51,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:03:52,013 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:03:52,013 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:03:52,019 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:03:52,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52 WrapperNode [2023-08-04 00:03:52,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:03:52,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:03:52,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:03:52,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:03:52,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,064 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 152 [2023-08-04 00:03:52,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:03:52,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:03:52,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:03:52,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:03:52,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,103 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:03:52,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:03:52,104 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:03:52,104 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:03:52,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (1/1) ... [2023-08-04 00:03:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:03:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:03:52,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:03:52,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:03:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:03:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:03:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:03:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:03:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:03:52,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:03:52,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:03:52,169 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:03:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:03:52,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:03:52,171 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:03:52,281 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:03:52,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:03:52,561 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:03:52,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:03:52,658 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:03:52,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:03:52 BoogieIcfgContainer [2023-08-04 00:03:52,659 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:03:52,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:03:52,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:03:52,666 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:03:52,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:03:51" (1/3) ... [2023-08-04 00:03:52,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89e1b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:03:52, skipping insertion in model container [2023-08-04 00:03:52,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:03:52" (2/3) ... [2023-08-04 00:03:52,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89e1b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:03:52, skipping insertion in model container [2023-08-04 00:03:52,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:03:52" (3/3) ... [2023-08-04 00:03:52,668 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe002_power.opt_pso.oepc_pso.opt_rmo.opt_bound2.i [2023-08-04 00:03:52,676 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:03:52,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:03:52,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 00:03:52,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:03:52,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:03:52,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 128 transitions, 271 flow [2023-08-04 00:03:52,861 INFO L124 PetriNetUnfolderBase]: 30/448 cut-off events. [2023-08-04 00:03:52,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:03:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 448 events. 30/448 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1958 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-04 00:03:52,870 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 128 transitions, 271 flow [2023-08-04 00:03:52,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 99 transitions, 213 flow [2023-08-04 00:03:52,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:03:52,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 99 transitions, 213 flow [2023-08-04 00:03:52,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 99 transitions, 213 flow [2023-08-04 00:03:52,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 99 transitions, 213 flow [2023-08-04 00:03:52,916 INFO L124 PetriNetUnfolderBase]: 6/216 cut-off events. [2023-08-04 00:03:52,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:03:52,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 216 events. 6/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 00:03:52,919 INFO L119 LiptonReduction]: Number of co-enabled transitions 1312 [2023-08-04 00:03:58,229 INFO L134 LiptonReduction]: Checked pairs total: 3172 [2023-08-04 00:03:58,229 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 00:03:58,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:03:58,266 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;@21465e37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:03:58,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:03:58,273 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:03:58,273 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 00:03:58,273 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:03:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:03:58,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:03:58,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:03:58,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:03:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1811507147, now seen corresponding path program 1 times [2023-08-04 00:03:58,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:03:58,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522006667] [2023-08-04 00:03:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:03:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:03:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:03:58,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:03:58,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522006667] [2023-08-04 00:03:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522006667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:03:58,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:03:58,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:03:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268266566] [2023-08-04 00:03:58,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:03:58,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:03:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:03:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:03:58,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:03:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 207 [2023-08-04 00:03:58,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:58,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:03:58,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 207 [2023-08-04 00:03:58,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:03:58,911 INFO L124 PetriNetUnfolderBase]: 467/869 cut-off events. [2023-08-04 00:03:58,911 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 00:03:58,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 869 events. 467/869 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4398 event pairs, 248 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 1756. Up to 760 conditions per place. [2023-08-04 00:03:58,921 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 00:03:58,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 125 flow [2023-08-04 00:03:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:03:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:03:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-04 00:03:58,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684380032206119 [2023-08-04 00:03:58,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-04 00:03:58,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-04 00:03:58,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:03:58,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-04 00:03:58,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:58,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:58,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:58,951 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 67 flow. Second operand 3 states and 353 transitions. [2023-08-04 00:03:58,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 125 flow [2023-08-04 00:03:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:03:58,955 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 75 flow [2023-08-04 00:03:58,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-04 00:03:58,959 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-04 00:03:58,959 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 75 flow [2023-08-04 00:03:58,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:58,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:03:58,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:03:58,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:03:58,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:03:58,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:03:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1822904295, now seen corresponding path program 1 times [2023-08-04 00:03:58,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:03:58,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455562413] [2023-08-04 00:03:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:03:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:03:58,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:03:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:03:59,012 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:03:59,013 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:03:59,014 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:03:59,015 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:03:59,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:03:59,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:03:59,016 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:03:59,018 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:03:59,018 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:03:59,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:03:59,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:03:59,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 152 transitions, 340 flow [2023-08-04 00:03:59,213 INFO L124 PetriNetUnfolderBase]: 93/1379 cut-off events. [2023-08-04 00:03:59,214 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:03:59,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477 conditions, 1379 events. 93/1379 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9462 event pairs, 0 based on Foata normal form. 0/1214 useless extension candidates. Maximal degree in co-relation 1002. Up to 54 conditions per place. [2023-08-04 00:03:59,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 152 transitions, 340 flow [2023-08-04 00:03:59,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 123 transitions, 282 flow [2023-08-04 00:03:59,225 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:03:59,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 123 transitions, 282 flow [2023-08-04 00:03:59,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 123 transitions, 282 flow [2023-08-04 00:03:59,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 123 transitions, 282 flow [2023-08-04 00:03:59,300 INFO L124 PetriNetUnfolderBase]: 12/596 cut-off events. [2023-08-04 00:03:59,301 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:03:59,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 596 events. 12/596 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3022 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 480. Up to 27 conditions per place. [2023-08-04 00:03:59,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 3628 [2023-08-04 00:04:03,337 INFO L134 LiptonReduction]: Checked pairs total: 10475 [2023-08-04 00:04:03,337 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 00:04:03,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:04:03,340 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;@21465e37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:04:03,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:04:03,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:04:03,354 INFO L124 PetriNetUnfolderBase]: 0/67 cut-off events. [2023-08-04 00:04:03,355 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:04:03,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:03,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:03,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:04:03,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1811664921, now seen corresponding path program 1 times [2023-08-04 00:04:03,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:03,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052074490] [2023-08-04 00:04:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:04:03,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:03,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052074490] [2023-08-04 00:04:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052074490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:04:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:04:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:04:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44042677] [2023-08-04 00:04:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:04:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:04:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:04:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:04:03,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:04:03,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:03,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:03,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:04:03,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:19,605 INFO L124 PetriNetUnfolderBase]: 99287/133330 cut-off events. [2023-08-04 00:04:19,606 INFO L125 PetriNetUnfolderBase]: For 8696/8696 co-relation queries the response was YES. [2023-08-04 00:04:20,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270229 conditions, 133330 events. 99287/133330 cut-off events. For 8696/8696 co-relation queries the response was YES. Maximal size of possible extension queue 3986. Compared 886107 event pairs, 78800 based on Foata normal form. 0/122477 useless extension candidates. Maximal degree in co-relation 62573. Up to 126604 conditions per place. [2023-08-04 00:04:20,695 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 00:04:20,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 212 flow [2023-08-04 00:04:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:04:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:04:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 00:04:20,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5812324929971989 [2023-08-04 00:04:20,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 00:04:20,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 00:04:20,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:20,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 00:04:20,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-04 00:04:20,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:20,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:20,705 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 124 flow. Second operand 3 states and 415 transitions. [2023-08-04 00:04:20,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 212 flow [2023-08-04 00:04:20,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 206 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:04:20,728 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 130 flow [2023-08-04 00:04:20,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-08-04 00:04:20,729 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 00:04:20,729 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 130 flow [2023-08-04 00:04:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:20,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:20,731 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:04:20,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:04:20,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:04:20,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:20,732 INFO L85 PathProgramCache]: Analyzing trace with hash 290855255, now seen corresponding path program 1 times [2023-08-04 00:04:20,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:20,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086121744] [2023-08-04 00:04:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:20,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:04:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:20,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086121744] [2023-08-04 00:04:20,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086121744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:04:20,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:04:20,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:04:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846729851] [2023-08-04 00:04:20,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:04:20,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:04:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:04:20,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:04:20,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:04:20,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:20,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:20,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:04:20,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:32,973 INFO L124 PetriNetUnfolderBase]: 99263/133434 cut-off events. [2023-08-04 00:04:32,973 INFO L125 PetriNetUnfolderBase]: For 7984/7984 co-relation queries the response was YES. [2023-08-04 00:04:33,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269712 conditions, 133434 events. 99263/133434 cut-off events. For 7984/7984 co-relation queries the response was YES. Maximal size of possible extension queue 3992. Compared 888371 event pairs, 62420 based on Foata normal form. 16/122629 useless extension candidates. Maximal degree in co-relation 70830. Up to 126521 conditions per place. [2023-08-04 00:04:34,336 INFO L140 encePairwiseOnDemand]: 234/238 looper letters, 42 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-04 00:04:34,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 242 flow [2023-08-04 00:04:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:04:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:04:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-08-04 00:04:34,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5605042016806723 [2023-08-04 00:04:34,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-08-04 00:04:34,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-08-04 00:04:34,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:34,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-08-04 00:04:34,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:34,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:34,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:34,351 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 130 flow. Second operand 5 states and 667 transitions. [2023-08-04 00:04:34,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 242 flow [2023-08-04 00:04:34,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:04:34,353 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 144 flow [2023-08-04 00:04:34,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-08-04 00:04:34,354 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-04 00:04:34,354 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 144 flow [2023-08-04 00:04:34,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:34,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:34,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 00:04:34,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:04:34,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2037869037, now seen corresponding path program 1 times [2023-08-04 00:04:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000933299] [2023-08-04 00:04:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:04:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000933299] [2023-08-04 00:04:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000933299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:04:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535354658] [2023-08-04 00:04:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:34,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:34,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:04:34,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:04:34,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:04:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:34,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:04:34,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:04:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:04:34,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:04:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535354658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:04:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:04:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:04:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752604250] [2023-08-04 00:04:34,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:04:34,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:04:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:04:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:04:34,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:04:34,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:34,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:34,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:04:34,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:49,013 INFO L124 PetriNetUnfolderBase]: 97376/132707 cut-off events. [2023-08-04 00:04:49,013 INFO L125 PetriNetUnfolderBase]: For 7480/7480 co-relation queries the response was YES. [2023-08-04 00:04:49,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267041 conditions, 132707 events. 97376/132707 cut-off events. For 7480/7480 co-relation queries the response was YES. Maximal size of possible extension queue 4204. Compared 910627 event pairs, 76147 based on Foata normal form. 0/121026 useless extension candidates. Maximal degree in co-relation 61570. Up to 123534 conditions per place. [2023-08-04 00:04:50,131 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 45 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 00:04:50,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 264 flow [2023-08-04 00:04:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:04:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:04:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-04 00:04:50,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910364145658263 [2023-08-04 00:04:50,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-04 00:04:50,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-04 00:04:50,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:50,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-04 00:04:50,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:50,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:50,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:50,139 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 144 flow. Second operand 3 states and 422 transitions. [2023-08-04 00:04:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 264 flow [2023-08-04 00:04:50,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 257 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:04:50,146 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 152 flow [2023-08-04 00:04:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-04 00:04:50,147 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-08-04 00:04:50,147 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 152 flow [2023-08-04 00:04:50,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:50,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:50,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:50,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:04:50,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:50,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:04:50,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:50,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1230600813, now seen corresponding path program 1 times [2023-08-04 00:04:50,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:50,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246670795] [2023-08-04 00:04:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:50,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:04:50,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246670795] [2023-08-04 00:04:50,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246670795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:04:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099753686] [2023-08-04 00:04:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:50,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:50,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:04:50,451 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) [2023-08-04 00:04:50,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:04:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:50,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:04:50,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:04:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:04:50,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:04:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:04:50,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099753686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:04:50,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:04:50,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 00:04:50,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232669468] [2023-08-04 00:04:50,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:04:50,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:04:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:50,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:04:50,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:04:50,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:04:50,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:50,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:50,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:04:50,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:00,500 INFO L124 PetriNetUnfolderBase]: 81082/110125 cut-off events. [2023-08-04 00:05:00,500 INFO L125 PetriNetUnfolderBase]: For 7064/7064 co-relation queries the response was YES. [2023-08-04 00:05:00,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221821 conditions, 110125 events. 81082/110125 cut-off events. For 7064/7064 co-relation queries the response was YES. Maximal size of possible extension queue 3697. Compared 736053 event pairs, 49312 based on Foata normal form. 4/101936 useless extension candidates. Maximal degree in co-relation 58081. Up to 102233 conditions per place. [2023-08-04 00:05:01,418 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 43 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 00:05:01,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 257 flow [2023-08-04 00:05:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:05:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:05:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2023-08-04 00:05:01,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569327731092437 [2023-08-04 00:05:01,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2023-08-04 00:05:01,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2023-08-04 00:05:01,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:01,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2023-08-04 00:05:01,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:01,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:01,424 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:01,424 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 152 flow. Second operand 4 states and 542 transitions. [2023-08-04 00:05:01,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 257 flow [2023-08-04 00:05:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:05:01,429 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 147 flow [2023-08-04 00:05:01,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 00:05:01,430 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-04 00:05:01,430 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 147 flow [2023-08-04 00:05:01,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:01,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:01,430 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:01,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:05:01,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 00:05:01,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:05:01,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash 20063878, now seen corresponding path program 1 times [2023-08-04 00:05:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322238929] [2023-08-04 00:05:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:05:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322238929] [2023-08-04 00:05:01,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322238929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:05:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072174732] [2023-08-04 00:05:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:05:01,706 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) [2023-08-04 00:05:01,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:05:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:01,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:05:01,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:05:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:05:01,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:05:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072174732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:05:01,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:05:01,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:05:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055329045] [2023-08-04 00:05:01,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:05:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:05:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:05:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:05:01,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:05:01,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:01,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:01,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:05:01,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:12,716 INFO L124 PetriNetUnfolderBase]: 79842/108997 cut-off events. [2023-08-04 00:05:12,716 INFO L125 PetriNetUnfolderBase]: For 5562/5562 co-relation queries the response was YES. [2023-08-04 00:05:13,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219170 conditions, 108997 events. 79842/108997 cut-off events. For 5562/5562 co-relation queries the response was YES. Maximal size of possible extension queue 3750. Compared 738476 event pairs, 18762 based on Foata normal form. 400/101332 useless extension candidates. Maximal degree in co-relation 57367. Up to 98424 conditions per place. [2023-08-04 00:05:13,809 INFO L140 encePairwiseOnDemand]: 234/238 looper letters, 64 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-08-04 00:05:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 345 flow [2023-08-04 00:05:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:05:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:05:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 688 transitions. [2023-08-04 00:05:13,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781512605042017 [2023-08-04 00:05:13,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 688 transitions. [2023-08-04 00:05:13,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 688 transitions. [2023-08-04 00:05:13,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:13,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 688 transitions. [2023-08-04 00:05:13,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:13,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:13,817 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:13,818 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 147 flow. Second operand 5 states and 688 transitions. [2023-08-04 00:05:13,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 345 flow [2023-08-04 00:05:13,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 338 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:05:13,824 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 157 flow [2023-08-04 00:05:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2023-08-04 00:05:13,825 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-08-04 00:05:13,825 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 157 flow [2023-08-04 00:05:13,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:13,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:13,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:13,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:05:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:14,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:05:14,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -963663045, now seen corresponding path program 1 times [2023-08-04 00:05:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458439248] [2023-08-04 00:05:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:05:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458439248] [2023-08-04 00:05:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458439248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:05:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303198369] [2023-08-04 00:05:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:05:14,099 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) [2023-08-04 00:05:14,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:05:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:14,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:05:14,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:05:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:05:14,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:05:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:05:14,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303198369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:05:14,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:05:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:05:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474419433] [2023-08-04 00:05:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:05:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:05:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:05:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:05:14,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 238 [2023-08-04 00:05:14,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:14,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:14,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 238 [2023-08-04 00:05:14,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:25,142 INFO L124 PetriNetUnfolderBase]: 69178/93693 cut-off events. [2023-08-04 00:05:25,143 INFO L125 PetriNetUnfolderBase]: For 7378/7378 co-relation queries the response was YES. [2023-08-04 00:05:25,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189854 conditions, 93693 events. 69178/93693 cut-off events. For 7378/7378 co-relation queries the response was YES. Maximal size of possible extension queue 3527. Compared 612967 event pairs, 40842 based on Foata normal form. 80/86444 useless extension candidates. Maximal degree in co-relation 49629. Up to 84569 conditions per place. [2023-08-04 00:05:26,019 INFO L140 encePairwiseOnDemand]: 235/238 looper letters, 58 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-04 00:05:26,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 323 flow [2023-08-04 00:05:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:05:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:05:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-04 00:05:26,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850840336134454 [2023-08-04 00:05:26,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-04 00:05:26,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-04 00:05:26,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:26,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-04 00:05:26,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:26,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:26,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:26,025 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 157 flow. Second operand 4 states and 557 transitions. [2023-08-04 00:05:26,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 323 flow [2023-08-04 00:05:26,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 318 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:05:26,031 INFO L231 Difference]: Finished difference. Result has 68 places, 44 transitions, 150 flow [2023-08-04 00:05:26,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=44} [2023-08-04 00:05:26,032 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-04 00:05:26,032 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 44 transitions, 150 flow [2023-08-04 00:05:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:26,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:05:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:26,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:05:26,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1170117963, now seen corresponding path program 1 times [2023-08-04 00:05:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120043565] [2023-08-04 00:05:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:05:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120043565] [2023-08-04 00:05:26,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120043565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:05:26,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133879672] [2023-08-04 00:05:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:05:26,403 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) [2023-08-04 00:05:26,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:05:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:26,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:05:26,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:05:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:05:26,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:05:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133879672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:05:26,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:05:26,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:05:26,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052762995] [2023-08-04 00:05:26,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:05:26,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:05:26,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:26,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:05:26,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:05:26,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 238 [2023-08-04 00:05:26,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 44 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:26,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:26,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 238 [2023-08-04 00:05:26,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:32,665 INFO L124 PetriNetUnfolderBase]: 39738/55149 cut-off events. [2023-08-04 00:05:32,666 INFO L125 PetriNetUnfolderBase]: For 5818/5818 co-relation queries the response was YES. [2023-08-04 00:05:32,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114350 conditions, 55149 events. 39738/55149 cut-off events. For 5818/5818 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 349401 event pairs, 2738 based on Foata normal form. 6400/56780 useless extension candidates. Maximal degree in co-relation 44257. Up to 38800 conditions per place. [2023-08-04 00:05:33,030 INFO L140 encePairwiseOnDemand]: 236/238 looper letters, 0 selfloop transitions, 0 changer transitions 74/74 dead transitions. [2023-08-04 00:05:33,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 342 flow [2023-08-04 00:05:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:05:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:05:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-04 00:05:33,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945378151260504 [2023-08-04 00:05:33,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-04 00:05:33,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-04 00:05:33,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:33,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-04 00:05:33,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:33,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:33,061 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 238.0) internal successors, (1190), 5 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:33,061 INFO L175 Difference]: Start difference. First operand has 68 places, 44 transitions, 150 flow. Second operand 4 states and 566 transitions. [2023-08-04 00:05:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 342 flow [2023-08-04 00:05:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 335 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:05:33,630 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2023-08-04 00:05:33,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2023-08-04 00:05:33,632 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-08-04 00:05:33,632 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2023-08-04 00:05:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:33,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:05:33,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:05:33,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:05:33,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:05:33,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:05:33,839 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:33,840 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:05:33,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 152 transitions, 340 flow [2023-08-04 00:05:34,203 INFO L124 PetriNetUnfolderBase]: 93/1379 cut-off events. [2023-08-04 00:05:34,204 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:05:34,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477 conditions, 1379 events. 93/1379 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9462 event pairs, 0 based on Foata normal form. 0/1214 useless extension candidates. Maximal degree in co-relation 1002. Up to 54 conditions per place. [2023-08-04 00:05:34,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 152 transitions, 340 flow [2023-08-04 00:05:34,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 151 transitions, 334 flow [2023-08-04 00:05:34,231 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:05:34,231 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 151 transitions, 334 flow [2023-08-04 00:05:34,231 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 151 transitions, 334 flow [2023-08-04 00:05:34,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 151 transitions, 334 flow [2023-08-04 00:05:34,395 INFO L124 PetriNetUnfolderBase]: 93/1378 cut-off events. [2023-08-04 00:05:34,395 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 00:05:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 1378 events. 93/1378 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9451 event pairs, 0 based on Foata normal form. 0/1213 useless extension candidates. Maximal degree in co-relation 999. Up to 54 conditions per place. [2023-08-04 00:05:34,430 INFO L119 LiptonReduction]: Number of co-enabled transitions 6040 [2023-08-04 00:05:38,246 INFO L134 LiptonReduction]: Checked pairs total: 15719 [2023-08-04 00:05:38,247 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 00:05:38,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:05:38,248 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;@21465e37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:05:38,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:05:38,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:05:38,252 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-08-04 00:05:38,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:05:38,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:38,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:05:38,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:05:38,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 856214731, now seen corresponding path program 1 times [2023-08-04 00:05:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651134627] [2023-08-04 00:05:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:05:38,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651134627] [2023-08-04 00:05:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651134627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:05:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:05:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:05:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836733630] [2023-08-04 00:05:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:05:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:05:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:05:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:05:38,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-08-04 00:05:38,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:38,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:38,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-08-04 00:05:38,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:06:29,317 INFO L124 PetriNetUnfolderBase]: 363272/479815 cut-off events. [2023-08-04 00:06:29,318 INFO L125 PetriNetUnfolderBase]: For 8764/8764 co-relation queries the response was YES. [2023-08-04 00:06:30,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946031 conditions, 479815 events. 363272/479815 cut-off events. For 8764/8764 co-relation queries the response was YES. Maximal size of possible extension queue 11825. Compared 3352975 event pairs, 293960 based on Foata normal form. 0/417206 useless extension candidates. Maximal degree in co-relation 203983. Up to 455689 conditions per place. [2023-08-04 00:06:32,135 INFO L140 encePairwiseOnDemand]: 265/269 looper letters, 42 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 00:06:32,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 226 flow [2023-08-04 00:06:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:06:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:06:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 00:06:32,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216852540272615 [2023-08-04 00:06:32,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 00:06:32,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 00:06:32,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:06:32,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 00:06:32,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:32,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:32,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:32,139 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 130 flow. Second operand 3 states and 421 transitions. [2023-08-04 00:06:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 226 flow [2023-08-04 00:06:32,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 222 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 00:06:32,145 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 136 flow [2023-08-04 00:06:32,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-04 00:06:32,146 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-04 00:06:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 136 flow [2023-08-04 00:06:32,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:06:32,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:06:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:06:32,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:06:32,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:06:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 627882996, now seen corresponding path program 1 times [2023-08-04 00:06:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:06:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505747658] [2023-08-04 00:06:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:06:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:06:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:06:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:06:32,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:06:32,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505747658] [2023-08-04 00:06:32,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505747658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:06:32,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674503916] [2023-08-04 00:06:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:06:32,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:06:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:06:32,185 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) [2023-08-04 00:06:32,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:06:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:06:32,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:06:32,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:06:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:06:32,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:06:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:06:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674503916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:06:32,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:06:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:06:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249723710] [2023-08-04 00:06:32,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:06:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:06:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:06:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:06:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:06:32,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 269 [2023-08-04 00:06:32,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:32,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:06:32,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 269 [2023-08-04 00:06:32,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:07:15,693 INFO L124 PetriNetUnfolderBase]: 301714/395013 cut-off events. [2023-08-04 00:07:15,699 INFO L125 PetriNetUnfolderBase]: For 6392/6392 co-relation queries the response was YES. [2023-08-04 00:07:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778550 conditions, 395013 events. 301714/395013 cut-off events. For 6392/6392 co-relation queries the response was YES. Maximal size of possible extension queue 10238. Compared 2648511 event pairs, 190828 based on Foata normal form. 4/344952 useless extension candidates. Maximal degree in co-relation 203870. Up to 375577 conditions per place. [2023-08-04 00:07:19,076 INFO L140 encePairwiseOnDemand]: 265/269 looper letters, 47 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 00:07:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 260 flow [2023-08-04 00:07:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:07:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:07:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 548 transitions. [2023-08-04 00:07:19,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092936802973977 [2023-08-04 00:07:19,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 548 transitions. [2023-08-04 00:07:19,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 548 transitions. [2023-08-04 00:07:19,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:07:19,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 548 transitions. [2023-08-04 00:07:19,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:07:19,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:07:19,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:07:19,091 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 136 flow. Second operand 4 states and 548 transitions. [2023-08-04 00:07:19,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 260 flow [2023-08-04 00:07:19,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:07:19,096 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 148 flow [2023-08-04 00:07:19,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2023-08-04 00:07:19,098 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-04 00:07:19,098 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 148 flow [2023-08-04 00:07:19,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:07:19,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:07:19,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:07:19,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 00:07:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:07:19,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:07:19,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:07:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1922487842, now seen corresponding path program 1 times [2023-08-04 00:07:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:07:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451691314] [2023-08-04 00:07:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:07:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:07:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:07:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:07:19,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:07:19,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451691314] [2023-08-04 00:07:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451691314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:07:19,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:07:19,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:07:19,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070602041] [2023-08-04 00:07:19,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:07:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:07:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:07:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:07:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:07:19,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 269 [2023-08-04 00:07:19,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:07:19,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:07:19,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 269 [2023-08-04 00:07:19,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand