/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:07:05,857 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:07:05,934 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:07:05,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:07:05,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:07:05,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:07:05,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:07:05,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:07:05,969 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:07:05,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:07:05,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:07:05,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:07:05,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:07:05,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:07:05,975 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:07:05,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:07:05,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:07:05,976 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:07:05,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:07:05,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:07:05,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:07:05,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:07:05,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:07:05,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:07:05,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:07:05,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:07:05,979 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:07:05,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:07:05,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:07:05,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:07:05,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:07:05,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:07:05,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:07:05,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:07:05,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:07:05,982 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:07:06,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:07:06,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:07:06,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:07:06,246 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:07:06,248 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:07:06,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_power.oepc_bound2.i [2023-08-03 18:07:07,415 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:07:07,630 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:07:07,631 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe009_power.oepc_bound2.i [2023-08-03 18:07:07,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/740a83ec6/3bb81ededb774dda9f8ba48acb8f450e/FLAGed1b73f49 [2023-08-03 18:07:07,668 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/740a83ec6/3bb81ededb774dda9f8ba48acb8f450e [2023-08-03 18:07:07,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:07:07,671 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:07:07,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:07:07,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:07:07,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:07:07,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:07:07" (1/1) ... [2023-08-03 18:07:07,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd10199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:07, skipping insertion in model container [2023-08-03 18:07:07,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:07:07" (1/1) ... [2023-08-03 18:07:07,750 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:07:07,874 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_safe009_power.oepc_bound2.i[995,1008] [2023-08-03 18:07:08,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:07:08,099 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:07:08,112 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_safe009_power.oepc_bound2.i[995,1008] [2023-08-03 18:07:08,130 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:07:08,132 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:07:08,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:07:08,229 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:07:08,229 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:07:08,235 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:07:08,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08 WrapperNode [2023-08-03 18:07:08,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:07:08,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:07:08,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:07:08,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:07:08,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,282 INFO L138 Inliner]: procedures = 176, calls = 76, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 193 [2023-08-03 18:07:08,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:07:08,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:07:08,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:07:08,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:07:08,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,341 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:07:08,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:07:08,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:07:08,342 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:07:08,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (1/1) ... [2023-08-03 18:07:08,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:07:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:07:08,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 18:07:08,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 18:07:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:07:08,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:07:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:07:08,402 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:07:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:07:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:07:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:07:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:07:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:07:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:07:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:07:08,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 18:07:08,536 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:07:08,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:07:08,962 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:07:09,218 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:07:09,218 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:07:09,220 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:07:09 BoogieIcfgContainer [2023-08-03 18:07:09,220 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:07:09,222 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:07:09,222 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:07:09,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:07:09,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:07:07" (1/3) ... [2023-08-03 18:07:09,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e708d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:07:09, skipping insertion in model container [2023-08-03 18:07:09,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:07:08" (2/3) ... [2023-08-03 18:07:09,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e708d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:07:09, skipping insertion in model container [2023-08-03 18:07:09,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:07:09" (3/3) ... [2023-08-03 18:07:09,228 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe009_power.oepc_bound2.i [2023-08-03 18:07:09,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:07:09,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:07:09,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:07:09,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:07:09,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:07:09,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-03 18:07:09,480 INFO L124 PetriNetUnfolderBase]: 30/460 cut-off events. [2023-08-03 18:07:09,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 460 events. 30/460 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1916 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-03 18:07:09,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-03 18:07:09,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 132 transitions, 279 flow [2023-08-03 18:07:09,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:07:09,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 279 flow [2023-08-03 18:07:09,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 132 transitions, 279 flow [2023-08-03 18:07:09,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 279 flow [2023-08-03 18:07:09,557 INFO L124 PetriNetUnfolderBase]: 22/364 cut-off events. [2023-08-03 18:07:09,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:09,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 364 events. 22/364 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1364 event pairs, 0 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 237. Up to 16 conditions per place. [2023-08-03 18:07:09,562 INFO L119 LiptonReduction]: Number of co-enabled transitions 1836 [2023-08-03 18:07:16,528 INFO L134 LiptonReduction]: Checked pairs total: 5158 [2023-08-03 18:07:16,528 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-03 18:07:16,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:07:16,545 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;@263b3559, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:07:16,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:07:16,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:07:16,551 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-03 18:07:16,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:07:16,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:16,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:07:16,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:07:16,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 488675701, now seen corresponding path program 1 times [2023-08-03 18:07:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418340532] [2023-08-03 18:07:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:16,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:07:16,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:07:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:07:16,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:07:16,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:07:16,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 18:07:16,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 18:07:16,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 18:07:16,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 18:07:16,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:07:16,710 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 18:07:16,712 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:07:16,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:07:16,753 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:07:16,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 166 transitions, 368 flow [2023-08-03 18:07:16,960 INFO L124 PetriNetUnfolderBase]: 93/1373 cut-off events. [2023-08-03 18:07:16,960 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:07:16,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 1373 events. 93/1373 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9253 event pairs, 0 based on Foata normal form. 0/1214 useless extension candidates. Maximal degree in co-relation 1005. Up to 54 conditions per place. [2023-08-03 18:07:16,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 166 transitions, 368 flow [2023-08-03 18:07:16,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 154 transitions, 344 flow [2023-08-03 18:07:16,972 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:07:16,972 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 154 transitions, 344 flow [2023-08-03 18:07:16,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 154 transitions, 344 flow [2023-08-03 18:07:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 154 transitions, 344 flow [2023-08-03 18:07:17,095 INFO L124 PetriNetUnfolderBase]: 66/1049 cut-off events. [2023-08-03 18:07:17,095 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:07:17,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 1049 events. 66/1049 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6476 event pairs, 0 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 789. Up to 54 conditions per place. [2023-08-03 18:07:17,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 4508 [2023-08-03 18:07:25,005 INFO L134 LiptonReduction]: Checked pairs total: 15106 [2023-08-03 18:07:25,006 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 18:07:25,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:07:25,010 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;@263b3559, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:07:25,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 18:07:25,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:07:25,016 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-03 18:07:25,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 18:07:25,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:07:25,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:07:25,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:07:25,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:07:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 677542771, now seen corresponding path program 1 times [2023-08-03 18:07:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:07:25,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872930122] [2023-08-03 18:07:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:07:25,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:07:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:07:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:07:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:07:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872930122] [2023-08-03 18:07:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872930122] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:07:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:07:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:07:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240191905] [2023-08-03 18:07:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:07:25,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:07:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:07:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:07:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:07:25,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-03 18:07:25,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:07:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:07:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-03 18:07:25,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:07:58,545 INFO L124 PetriNetUnfolderBase]: 155552/203196 cut-off events. [2023-08-03 18:07:58,545 INFO L125 PetriNetUnfolderBase]: For 3720/3720 co-relation queries the response was YES. [2023-08-03 18:07:59,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406271 conditions, 203196 events. 155552/203196 cut-off events. For 3720/3720 co-relation queries the response was YES. Maximal size of possible extension queue 5414. Compared 1301717 event pairs, 126978 based on Foata normal form. 5292/195899 useless extension candidates. Maximal degree in co-relation 116368. Up to 198414 conditions per place. [2023-08-03 18:08:00,072 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 37 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-03 18:08:00,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 216 flow [2023-08-03 18:08:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:08:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:08:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-03 18:08:00,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551601423487544 [2023-08-03 18:08:00,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-03 18:08:00,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-03 18:08:00,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:08:00,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-03 18:08:00,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:00,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:00,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:00,103 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 130 flow. Second operand 3 states and 468 transitions. [2023-08-03 18:08:00,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 216 flow [2023-08-03 18:08:00,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:08:00,117 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 132 flow [2023-08-03 18:08:00,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-03 18:08:00,123 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-03 18:08:00,124 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 132 flow [2023-08-03 18:08:00,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:00,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:08:00,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:08:00,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:08:00,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:08:00,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:08:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1558843617, now seen corresponding path program 1 times [2023-08-03 18:08:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:08:00,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297137596] [2023-08-03 18:08:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:08:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:08:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:08:00,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297137596] [2023-08-03 18:08:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297137596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:08:00,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:08:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 18:08:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374487774] [2023-08-03 18:08:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:08:00,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:08:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:08:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:08:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:08:00,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 281 [2023-08-03 18:08:00,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:00,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:08:00,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 281 [2023-08-03 18:08:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:08:27,189 INFO L124 PetriNetUnfolderBase]: 135758/177603 cut-off events. [2023-08-03 18:08:27,189 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-03 18:08:27,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355139 conditions, 177603 events. 135758/177603 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 4681. Compared 1125128 event pairs, 91944 based on Foata normal form. 9/170567 useless extension candidates. Maximal degree in co-relation 126715. Up to 173293 conditions per place. [2023-08-03 18:08:28,476 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 40 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-03 18:08:28,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 234 flow [2023-08-03 18:08:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:08:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:08:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-03 18:08:28,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338078291814946 [2023-08-03 18:08:28,480 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-03 18:08:28,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-03 18:08:28,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:08:28,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-03 18:08:28,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:28,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:28,488 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:28,488 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 132 flow. Second operand 5 states and 750 transitions. [2023-08-03 18:08:28,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 234 flow [2023-08-03 18:08:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:08:28,491 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 146 flow [2023-08-03 18:08:28,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-03 18:08:28,492 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-08-03 18:08:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 146 flow [2023-08-03 18:08:28,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:28,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:08:28,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:08:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:08:28,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:08:28,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:08:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1751077388, now seen corresponding path program 1 times [2023-08-03 18:08:28,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:08:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505538716] [2023-08-03 18:08:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:08:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:08:28,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:08:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505538716] [2023-08-03 18:08:28,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505538716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:08:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344495898] [2023-08-03 18:08:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:28,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:08:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:08:28,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:08:28,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:08:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:28,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:08:28,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:08:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:08:28,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:08:28,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344495898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:08:28,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:08:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:08:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752378110] [2023-08-03 18:08:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:08:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:08:28,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:08:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:08:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:08:28,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-03 18:08:28,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:28,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:08:28,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-03 18:08:28,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:08:54,166 INFO L124 PetriNetUnfolderBase]: 131626/170164 cut-off events. [2023-08-03 18:08:54,166 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-03 18:08:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342227 conditions, 170164 events. 131626/170164 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 4655. Compared 1058208 event pairs, 104758 based on Foata normal form. 0/164403 useless extension candidates. Maximal degree in co-relation 98152. Up to 167284 conditions per place. [2023-08-03 18:08:55,308 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 43 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-03 18:08:55,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 256 flow [2023-08-03 18:08:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:08:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:08:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-03 18:08:55,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587188612099644 [2023-08-03 18:08:55,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-03 18:08:55,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-03 18:08:55,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:08:55,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-03 18:08:55,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:55,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:55,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:55,315 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 146 flow. Second operand 3 states and 471 transitions. [2023-08-03 18:08:55,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 256 flow [2023-08-03 18:08:55,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 249 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 18:08:55,320 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 154 flow [2023-08-03 18:08:55,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-03 18:08:55,321 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-03 18:08:55,321 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 154 flow [2023-08-03 18:08:55,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:55,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:08:55,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:08:55,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 18:08:55,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:08:55,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:08:55,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:08:55,529 INFO L85 PathProgramCache]: Analyzing trace with hash -194646611, now seen corresponding path program 1 times [2023-08-03 18:08:55,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:08:55,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620115354] [2023-08-03 18:08:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:55,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:08:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:08:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:08:55,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620115354] [2023-08-03 18:08:55,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620115354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:08:55,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357004403] [2023-08-03 18:08:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:08:55,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:08:55,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:08:55,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:08:55,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:08:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:08:55,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:08:55,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:08:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 18:08:55,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:08:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357004403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:08:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:08:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:08:55,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341866167] [2023-08-03 18:08:55,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:08:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:08:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:08:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:08:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:08:55,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-03 18:08:55,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:08:55,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:08:55,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-03 18:08:55,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:09:20,894 INFO L124 PetriNetUnfolderBase]: 129210/166692 cut-off events. [2023-08-03 18:09:20,894 INFO L125 PetriNetUnfolderBase]: For 1644/1644 co-relation queries the response was YES. [2023-08-03 18:09:21,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335895 conditions, 166692 events. 129210/166692 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 4689. Compared 1013347 event pairs, 101106 based on Foata normal form. 0/161651 useless extension candidates. Maximal degree in co-relation 96468. Up to 159000 conditions per place. [2023-08-03 18:09:22,058 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 51 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-03 18:09:22,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 290 flow [2023-08-03 18:09:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:09:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:09:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-03 18:09:22,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658362989323843 [2023-08-03 18:09:22,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-03 18:09:22,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-03 18:09:22,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:09:22,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-03 18:09:22,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:22,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:22,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:22,064 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 154 flow. Second operand 3 states and 477 transitions. [2023-08-03 18:09:22,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 290 flow [2023-08-03 18:09:22,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:09:22,068 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 163 flow [2023-08-03 18:09:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2023-08-03 18:09:22,069 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-08-03 18:09:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 163 flow [2023-08-03 18:09:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:09:22,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:09:22,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 18:09:22,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:09:22,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:09:22,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:09:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2037797406, now seen corresponding path program 1 times [2023-08-03 18:09:22,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:09:22,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942061389] [2023-08-03 18:09:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:09:22,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:09:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:09:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:09:22,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:09:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942061389] [2023-08-03 18:09:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942061389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:09:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504428646] [2023-08-03 18:09:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:09:22,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:09:22,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:09:22,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:09:22,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:09:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:09:22,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:09:22,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:09:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:09:22,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:09:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 18:09:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504428646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:09:22,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:09:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 18:09:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351718289] [2023-08-03 18:09:22,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:09:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 18:09:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:09:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 18:09:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 18:09:22,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 281 [2023-08-03 18:09:22,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:22,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:09:22,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 281 [2023-08-03 18:09:22,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:09:42,793 INFO L124 PetriNetUnfolderBase]: 101266/129275 cut-off events. [2023-08-03 18:09:42,794 INFO L125 PetriNetUnfolderBase]: For 9552/9552 co-relation queries the response was YES. [2023-08-03 18:09:43,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268621 conditions, 129275 events. 101266/129275 cut-off events. For 9552/9552 co-relation queries the response was YES. Maximal size of possible extension queue 3795. Compared 748153 event pairs, 66420 based on Foata normal form. 3/129097 useless extension candidates. Maximal degree in co-relation 95325. Up to 127384 conditions per place. [2023-08-03 18:09:43,762 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 18:09:43,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 261 flow [2023-08-03 18:09:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:09:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:09:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-03 18:09:43,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409252669039146 [2023-08-03 18:09:43,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-03 18:09:43,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-03 18:09:43,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:09:43,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-03 18:09:43,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:43,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:43,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:43,769 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 163 flow. Second operand 4 states and 608 transitions. [2023-08-03 18:09:43,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 261 flow [2023-08-03 18:09:43,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 54 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:09:43,784 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 159 flow [2023-08-03 18:09:43,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-03 18:09:43,785 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-03 18:09:43,785 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 159 flow [2023-08-03 18:09:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:43,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:09:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:09:43,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 18:09:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:09:43,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:09:43,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:09:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1506266624, now seen corresponding path program 1 times [2023-08-03 18:09:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:09:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196447752] [2023-08-03 18:09:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:09:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:09:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:09:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:09:44,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:09:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196447752] [2023-08-03 18:09:44,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196447752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:09:44,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521836759] [2023-08-03 18:09:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:09:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:09:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:09:44,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:09:44,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 18:09:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:09:44,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:09:44,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:09:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:09:44,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:09:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521836759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:09:44,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:09:44,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:09:44,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61310867] [2023-08-03 18:09:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:09:44,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:09:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:09:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:09:44,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:09:44,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 281 [2023-08-03 18:09:44,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:09:44,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:09:44,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 281 [2023-08-03 18:09:44,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:10:04,359 INFO L124 PetriNetUnfolderBase]: 100858/128584 cut-off events. [2023-08-03 18:10:04,360 INFO L125 PetriNetUnfolderBase]: For 8431/8431 co-relation queries the response was YES. [2023-08-03 18:10:04,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266644 conditions, 128584 events. 100858/128584 cut-off events. For 8431/8431 co-relation queries the response was YES. Maximal size of possible extension queue 3795. Compared 743510 event pairs, 31342 based on Foata normal form. 144/128547 useless extension candidates. Maximal degree in co-relation 94632. Up to 126018 conditions per place. [2023-08-03 18:10:05,191 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 57 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-03 18:10:05,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 327 flow [2023-08-03 18:10:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:10:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:10:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 765 transitions. [2023-08-03 18:10:05,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444839857651246 [2023-08-03 18:10:05,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 765 transitions. [2023-08-03 18:10:05,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 765 transitions. [2023-08-03 18:10:05,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:10:05,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 765 transitions. [2023-08-03 18:10:05,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:10:05,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:10:05,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:10:05,198 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 159 flow. Second operand 5 states and 765 transitions. [2023-08-03 18:10:05,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 327 flow [2023-08-03 18:10:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 18:10:05,207 INFO L231 Difference]: Finished difference. Result has 70 places, 47 transitions, 171 flow [2023-08-03 18:10:05,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2023-08-03 18:10:05,208 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-03 18:10:05,208 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 171 flow [2023-08-03 18:10:05,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:10:05,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:10:05,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:10:05,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 18:10:05,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:10:05,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 18:10:05,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:10:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1016108708, now seen corresponding path program 1 times [2023-08-03 18:10:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:10:05,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856909911] [2023-08-03 18:10:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:10:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:10:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:10:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:10:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:10:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856909911] [2023-08-03 18:10:05,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856909911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:10:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775099886] [2023-08-03 18:10:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:10:05,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:10:05,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:10:05,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:10:05,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 18:10:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:10:05,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:10:05,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:10:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:10:05,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:10:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 18:10:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775099886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:10:05,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:10:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:10:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849482412] [2023-08-03 18:10:05,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:10:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:10:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:10:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:10:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:10:05,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 281 [2023-08-03 18:10:05,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 18:10:05,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:10:05,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 281 [2023-08-03 18:10:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand