/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:12:29,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:12:29,328 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:12:29,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:12:29,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:12:29,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:12:29,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:12:29,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:12:29,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:12:29,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:12:29,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:12:29,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:12:29,369 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:12:29,370 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:12:29,370 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:12:29,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:12:29,371 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:12:29,371 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:12:29,371 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:12:29,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:12:29,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:12:29,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:12:29,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:12:29,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:12:29,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:12:29,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:12:29,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:12:29,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:12:29,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:12:29,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:29,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:12:29,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:12:29,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:12:29,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:12:29,376 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:12:29,376 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:12:29,376 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:12:29,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:12:29,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:12:29,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:12:29,652 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:12:29,653 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:12:29,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:12:30,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:12:31,057 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:12:31,057 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:12:31,088 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dc3c5945/b95dca59c7fc4e6191d930c8ffa80ddb/FLAG0237fb215 [2023-08-03 23:12:31,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dc3c5945/b95dca59c7fc4e6191d930c8ffa80ddb [2023-08-03 23:12:31,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:12:31,104 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:12:31,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:31,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:12:31,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:12:31,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7c40da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31, skipping insertion in model container [2023-08-03 23:12:31,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,174 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:12:31,345 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_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:12:31,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:31,535 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:12:31,550 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_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:12:31,565 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:31,572 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:31,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:31,629 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:31,630 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:31,635 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:12:31,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31 WrapperNode [2023-08-03 23:12:31,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:31,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:31,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:12:31,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:12:31,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,679 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2023-08-03 23:12:31,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:31,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:12:31,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:12:31,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:12:31,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,714 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:12:31,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:12:31,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:12:31,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:12:31,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (1/1) ... [2023-08-03 23:12:31,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:31,761 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 23:12:31,763 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 23:12:31,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:12:31,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:12:31,787 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:12:31,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:12:31,788 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:12:31,788 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:12:31,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:12:31,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:12:31,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:12:31,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:12:31,789 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 23:12:31,917 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:12:31,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:12:32,295 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:12:32,418 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:12:32,418 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:12:32,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:32 BoogieIcfgContainer [2023-08-03 23:12:32,420 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:12:32,423 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:12:32,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:12:32,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:12:32,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:12:31" (1/3) ... [2023-08-03 23:12:32,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453c6b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:32, skipping insertion in model container [2023-08-03 23:12:32,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:31" (2/3) ... [2023-08-03 23:12:32,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453c6b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:32, skipping insertion in model container [2023-08-03 23:12:32,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:32" (3/3) ... [2023-08-03 23:12:32,430 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix011_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:12:32,437 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:12:32,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:12:32,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:12:32,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:12:32,503 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 135 transitions, 285 flow [2023-08-03 23:12:32,679 INFO L124 PetriNetUnfolderBase]: 30/459 cut-off events. [2023-08-03 23:12:32,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:32,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 459 events. 30/459 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2037 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 276. Up to 16 conditions per place. [2023-08-03 23:12:32,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 135 transitions, 285 flow [2023-08-03 23:12:32,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:32,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:32,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:32,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:32,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:32,737 INFO L124 PetriNetUnfolderBase]: 6/227 cut-off events. [2023-08-03 23:12:32,737 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:32,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 227 events. 6/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 683 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2023-08-03 23:12:32,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 1666 [2023-08-03 23:12:35,852 INFO L134 LiptonReduction]: Checked pairs total: 3737 [2023-08-03 23:12:35,853 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 23:12:35,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:35,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@762f23cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:35,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:35,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:35,875 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:12:35,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:35,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:35,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:12:35,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:35,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -837133811, now seen corresponding path program 1 times [2023-08-03 23:12:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:35,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483255309] [2023-08-03 23:12:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:36,138 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 23:12:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483255309] [2023-08-03 23:12:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483255309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:36,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:12:36,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:12:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450849213] [2023-08-03 23:12:36,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:36,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:12:36,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 220 [2023-08-03 23:12:36,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 23:12:36,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:36,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 220 [2023-08-03 23:12:36,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:36,454 INFO L124 PetriNetUnfolderBase]: 720/1176 cut-off events. [2023-08-03 23:12:36,454 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:12:36,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 1176 events. 720/1176 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5156 event pairs, 548 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 2409. Up to 1146 conditions per place. [2023-08-03 23:12:36,465 INFO L140 encePairwiseOnDemand]: 217/220 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 23:12:36,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 135 flow [2023-08-03 23:12:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:12:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:12:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-03 23:12:36,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-03 23:12:36,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-03 23:12:36,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-03 23:12:36,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:36,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-03 23:12:36,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 23:12:36,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 23:12:36,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 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 23:12:36,497 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 374 transitions. [2023-08-03 23:12:36,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 135 flow [2023-08-03 23:12:36,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:12:36,501 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:12:36,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:12:36,505 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:12:36,505 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:12:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 23:12:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:36,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:12:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:12:36,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:36,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash -844929038, now seen corresponding path program 1 times [2023-08-03 23:12:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442879763] [2023-08-03 23:12:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:36,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:12:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:36,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:12:36,553 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:12:36,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:12:36,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:12:36,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:12:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:12:36,557 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:12:36,559 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:12:36,559 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:12:36,559 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:12:36,589 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:36,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:12:36,784 INFO L124 PetriNetUnfolderBase]: 93/1410 cut-off events. [2023-08-03 23:12:36,785 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:36,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 1410 events. 93/1410 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9796 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 1024. Up to 54 conditions per place. [2023-08-03 23:12:36,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:12:36,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:36,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:36,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:36,798 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:36,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:36,885 INFO L124 PetriNetUnfolderBase]: 12/627 cut-off events. [2023-08-03 23:12:36,885 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:36,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 627 events. 12/627 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3291 event pairs, 0 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 502. Up to 27 conditions per place. [2023-08-03 23:12:36,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 4732 [2023-08-03 23:12:39,912 INFO L134 LiptonReduction]: Checked pairs total: 17915 [2023-08-03 23:12:39,912 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 23:12:39,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:39,915 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;@762f23cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:39,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:39,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:39,922 INFO L124 PetriNetUnfolderBase]: 0/70 cut-off events. [2023-08-03 23:12:39,922 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:12:39,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:39,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:39,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:39,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1724552743, now seen corresponding path program 1 times [2023-08-03 23:12:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:39,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909265306] [2023-08-03 23:12:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:39,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:12:40,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:40,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909265306] [2023-08-03 23:12:40,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909265306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:40,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:12:40,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:12:40,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132899209] [2023-08-03 23:12:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:40,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:40,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:12:40,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:12:40,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:40,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:40,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:12:40,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:59,399 INFO L124 PetriNetUnfolderBase]: 150910/207529 cut-off events. [2023-08-03 23:12:59,400 INFO L125 PetriNetUnfolderBase]: For 10735/10735 co-relation queries the response was YES. [2023-08-03 23:12:59,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411426 conditions, 207529 events. 150910/207529 cut-off events. For 10735/10735 co-relation queries the response was YES. Maximal size of possible extension queue 6596. Compared 1564495 event pairs, 118610 based on Foata normal form. 0/187518 useless extension candidates. Maximal degree in co-relation 86503. Up to 191286 conditions per place. [2023-08-03 23:13:00,943 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 40 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-03 23:13:00,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 236 flow [2023-08-03 23:13:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:13:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:13:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-03 23:13:00,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886243386243386 [2023-08-03 23:13:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-03 23:13:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-03 23:13:00,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:00,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-03 23:13:00,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 23:13:00,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 23:13:00,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 23:13:00,953 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 140 flow. Second operand 3 states and 445 transitions. [2023-08-03 23:13:00,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 236 flow [2023-08-03 23:13:00,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 230 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:13:00,976 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 146 flow [2023-08-03 23:13:00,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-03 23:13:00,977 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-03 23:13:00,977 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 146 flow [2023-08-03 23:13:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:00,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:00,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:13:00,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:13:00,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:00,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 671852590, now seen corresponding path program 1 times [2023-08-03 23:13:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:00,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354023878] [2023-08-03 23:13:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:13:01,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:01,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354023878] [2023-08-03 23:13:01,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354023878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:01,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305316507] [2023-08-03 23:13:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:01,077 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 23:13:01,089 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 23:13:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:01,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:01,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:01,283 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 23:13:01,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305316507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:13:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662795294] [2023-08-03 23:13:01,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:01,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:13:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-03 23:13:01,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:01,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:01,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-03 23:13:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:19,450 INFO L124 PetriNetUnfolderBase]: 150870/207619 cut-off events. [2023-08-03 23:13:19,451 INFO L125 PetriNetUnfolderBase]: For 9965/9965 co-relation queries the response was YES. [2023-08-03 23:13:19,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410789 conditions, 207619 events. 150870/207619 cut-off events. For 9965/9965 co-relation queries the response was YES. Maximal size of possible extension queue 6596. Compared 1568147 event pairs, 91710 based on Foata normal form. 25/187658 useless extension candidates. Maximal degree in co-relation 101516. Up to 191157 conditions per place. [2023-08-03 23:13:20,650 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 47 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-08-03 23:13:20,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 274 flow [2023-08-03 23:13:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:13:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:13:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-03 23:13:20,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2023-08-03 23:13:20,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-03 23:13:20,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-03 23:13:20,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:20,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-03 23:13:20,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 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 23:13:20,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 23:13:20,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 23:13:20,660 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 146 flow. Second operand 5 states and 717 transitions. [2023-08-03 23:13:20,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 274 flow [2023-08-03 23:13:20,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 66 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:20,662 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 160 flow [2023-08-03 23:13:20,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-03 23:13:20,663 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-03 23:13:20,663 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 160 flow [2023-08-03 23:13:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:20,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:20,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:20,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:13:20,873 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 23:13:20,873 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:20,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 588170003, now seen corresponding path program 1 times [2023-08-03 23:13:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491865644] [2023-08-03 23:13:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:13:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491865644] [2023-08-03 23:13:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491865644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543451501] [2023-08-03 23:13:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:20,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:20,941 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 23:13:20,952 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 23:13:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:21,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:13:21,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:13:21,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543451501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:13:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909227043] [2023-08-03 23:13:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:13:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:13:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:21,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:13:21,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:21,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:21,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:13:21,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:38,029 INFO L124 PetriNetUnfolderBase]: 146266/196211 cut-off events. [2023-08-03 23:13:38,029 INFO L125 PetriNetUnfolderBase]: For 9275/9275 co-relation queries the response was YES. [2023-08-03 23:13:38,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393370 conditions, 196211 events. 146266/196211 cut-off events. For 9275/9275 co-relation queries the response was YES. Maximal size of possible extension queue 6770. Compared 1422520 event pairs, 117292 based on Foata normal form. 0/178312 useless extension candidates. Maximal degree in co-relation 126819. Up to 184350 conditions per place. [2023-08-03 23:13:39,189 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 48 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-03 23:13:39,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 288 flow [2023-08-03 23:13:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:13:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:13:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-03 23:13:39,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2023-08-03 23:13:39,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-03 23:13:39,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-03 23:13:39,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:39,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-03 23:13:39,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 23:13:39,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 23:13:39,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 23:13:39,195 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 160 flow. Second operand 3 states and 452 transitions. [2023-08-03 23:13:39,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 288 flow [2023-08-03 23:13:39,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 281 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:39,200 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 168 flow [2023-08-03 23:13:39,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-03 23:13:39,201 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-03 23:13:39,201 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 168 flow [2023-08-03 23:13:39,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:39,201 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:39,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 23:13:39,406 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 23:13:39,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:39,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1686249890, now seen corresponding path program 1 times [2023-08-03 23:13:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:39,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085604662] [2023-08-03 23:13:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:39,507 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 23:13:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085604662] [2023-08-03 23:13:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085604662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:39,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157502167] [2023-08-03 23:13:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:39,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:39,522 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 23:13:39,526 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 23:13:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:39,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:13:39,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:39,634 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 23:13:39,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:13:39,656 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 23:13:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157502167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:13:39,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:13:39,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:13:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400719455] [2023-08-03 23:13:39,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:13:39,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:39,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:39,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-03 23:13:39,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:39,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-03 23:13:39,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:53,914 INFO L124 PetriNetUnfolderBase]: 126173/166402 cut-off events. [2023-08-03 23:13:53,914 INFO L125 PetriNetUnfolderBase]: For 8880/8880 co-relation queries the response was YES. [2023-08-03 23:13:54,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336088 conditions, 166402 events. 126173/166402 cut-off events. For 8880/8880 co-relation queries the response was YES. Maximal size of possible extension queue 5913. Compared 1143061 event pairs, 74825 based on Foata normal form. 5/151489 useless extension candidates. Maximal degree in co-relation 82604. Up to 158221 conditions per place. [2023-08-03 23:13:54,878 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 48 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-03 23:13:54,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 66 transitions, 289 flow [2023-08-03 23:13:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 583 transitions. [2023-08-03 23:13:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783730158730159 [2023-08-03 23:13:54,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 583 transitions. [2023-08-03 23:13:54,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 583 transitions. [2023-08-03 23:13:54,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:54,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 583 transitions. [2023-08-03 23:13:54,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:54,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:13:54,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:13:54,884 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 168 flow. Second operand 4 states and 583 transitions. [2023-08-03 23:13:54,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 66 transitions, 289 flow [2023-08-03 23:13:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:13:54,887 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 163 flow [2023-08-03 23:13:54,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-03 23:13:54,888 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:13:54,888 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 163 flow [2023-08-03 23:13:54,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:54,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:54,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:54,897 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 23:13:55,097 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 23:13:55,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:55,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:55,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2026394185, now seen corresponding path program 1 times [2023-08-03 23:13:55,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:55,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407959620] [2023-08-03 23:13:55,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:55,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:55,225 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 23:13:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407959620] [2023-08-03 23:13:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407959620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952012610] [2023-08-03 23:13:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:55,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:55,230 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 23:13:55,233 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 23:13:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:55,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:55,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:55,348 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 23:13:55,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:55,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952012610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:55,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:55,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:13:55,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334654867] [2023-08-03 23:13:55,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:55,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:13:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-03 23:13:55,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:55,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-03 23:13:55,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:09,518 INFO L124 PetriNetUnfolderBase]: 124933/165668 cut-off events. [2023-08-03 23:14:09,518 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2023-08-03 23:14:09,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333870 conditions, 165668 events. 124933/165668 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 6022. Compared 1160188 event pairs, 32068 based on Foata normal form. 400/151760 useless extension candidates. Maximal degree in co-relation 125893. Up to 154115 conditions per place. [2023-08-03 23:14:10,479 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 69 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-03 23:14:10,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 377 flow [2023-08-03 23:14:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:14:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:14:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 738 transitions. [2023-08-03 23:14:10,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2023-08-03 23:14:10,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 738 transitions. [2023-08-03 23:14:10,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 738 transitions. [2023-08-03 23:14:10,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:10,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 738 transitions. [2023-08-03 23:14:10,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 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 23:14:10,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 23:14:10,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 23:14:10,485 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 163 flow. Second operand 5 states and 738 transitions. [2023-08-03 23:14:10,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 377 flow [2023-08-03 23:14:10,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 87 transitions, 370 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:14:10,489 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 173 flow [2023-08-03 23:14:10,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-03 23:14:10,490 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-03 23:14:10,490 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 173 flow [2023-08-03 23:14:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:10,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:10,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:10,499 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 23:14:10,695 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 23:14:10,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:14:10,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1819261548, now seen corresponding path program 1 times [2023-08-03 23:14:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:10,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112573080] [2023-08-03 23:14:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:10,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:14:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:10,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112573080] [2023-08-03 23:14:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112573080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:14:10,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617796031] [2023-08-03 23:14:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:10,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:14:10,769 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 23:14:10,772 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 23:14:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:10,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:14:10,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:14:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:14:10,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:14:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:14:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617796031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:14:10,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:14:10,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:14:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038491945] [2023-08-03 23:14:10,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:14:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:14:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:14:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:14:10,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 252 [2023-08-03 23:14:10,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 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 23:14:10,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:10,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 252 [2023-08-03 23:14:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:23,912 INFO L124 PetriNetUnfolderBase]: 104198/136233 cut-off events. [2023-08-03 23:14:23,912 INFO L125 PetriNetUnfolderBase]: For 9540/9540 co-relation queries the response was YES. [2023-08-03 23:14:24,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276620 conditions, 136233 events. 104198/136233 cut-off events. For 9540/9540 co-relation queries the response was YES. Maximal size of possible extension queue 5391. Compared 909171 event pairs, 77548 based on Foata normal form. 100/124865 useless extension candidates. Maximal degree in co-relation 104459. Up to 127416 conditions per place. [2023-08-03 23:14:24,868 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 61 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-03 23:14:24,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 347 flow [2023-08-03 23:14:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:14:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:14:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2023-08-03 23:14:24,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2023-08-03 23:14:24,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2023-08-03 23:14:24,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2023-08-03 23:14:24,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:24,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2023-08-03 23:14:24,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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 23:14:24,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:14:24,873 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:14:24,873 INFO L175 Difference]: Start difference. First operand has 75 places, 53 transitions, 173 flow. Second operand 4 states and 596 transitions. [2023-08-03 23:14:24,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 347 flow [2023-08-03 23:14:24,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 342 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:14:24,880 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 166 flow [2023-08-03 23:14:24,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2023-08-03 23:14:24,881 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-03 23:14:24,881 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 166 flow [2023-08-03 23:14:24,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 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 23:14:24,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:24,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:24,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:14:25,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:25,082 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:14:25,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1405399789, now seen corresponding path program 1 times [2023-08-03 23:14:25,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:25,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142803306] [2023-08-03 23:14:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:14:25,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142803306] [2023-08-03 23:14:25,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142803306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:14:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756583172] [2023-08-03 23:14:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:25,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:14:25,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:14:25,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:14:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:25,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:14:25,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:14:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:14:25,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:14:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756583172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:14:25,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:14:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:14:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501689126] [2023-08-03 23:14:25,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:14:25,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:14:25,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:14:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:14:25,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:14:25,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 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 23:14:25,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:25,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:14:25,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:31,627 INFO L124 PetriNetUnfolderBase]: 57198/78408 cut-off events. [2023-08-03 23:14:31,627 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-03 23:14:31,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160995 conditions, 78408 events. 57198/78408 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 3227. Compared 534393 event pairs, 2958 based on Foata normal form. 10000/81540 useless extension candidates. Maximal degree in co-relation 60609. Up to 58800 conditions per place. [2023-08-03 23:14:31,854 INFO L140 encePairwiseOnDemand]: 250/252 looper letters, 0 selfloop transitions, 0 changer transitions 83/83 dead transitions. [2023-08-03 23:14:31,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 366 flow [2023-08-03 23:14:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:14:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:14:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 605 transitions. [2023-08-03 23:14:31,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6001984126984127 [2023-08-03 23:14:31,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 605 transitions. [2023-08-03 23:14:31,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 605 transitions. [2023-08-03 23:14:31,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:31,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 605 transitions. [2023-08-03 23:14:31,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 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 23:14:31,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:14:31,859 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 23:14:31,859 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 166 flow. Second operand 4 states and 605 transitions. [2023-08-03 23:14:31,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 366 flow [2023-08-03 23:14:32,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 359 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:14:32,600 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:32,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-03 23:14:32,600 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:14:32,601 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:32,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 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 23:14:32,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:14:32,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:14:32,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:14:32,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 23:14:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:32,806 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:32,807 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:14:32,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:32,918 INFO L124 PetriNetUnfolderBase]: 93/1410 cut-off events. [2023-08-03 23:14:32,918 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:14:32,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 1410 events. 93/1410 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9796 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 1024. Up to 54 conditions per place. [2023-08-03 23:14:32,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:32,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:32,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:14:32,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:32,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:33,033 INFO L124 PetriNetUnfolderBase]: 93/1410 cut-off events. [2023-08-03 23:14:33,033 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:14:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1508 conditions, 1410 events. 93/1410 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9796 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 1024. Up to 54 conditions per place. [2023-08-03 23:14:33,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 7632 [2023-08-03 23:14:36,109 INFO L134 LiptonReduction]: Checked pairs total: 28783 [2023-08-03 23:14:36,109 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-03 23:14:36,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:14:36,111 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;@762f23cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:14:36,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:14:36,113 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:14:36,113 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-03 23:14:36,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:14:36,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:36,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:14:36,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:14:36,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash 29295982, now seen corresponding path program 1 times [2023-08-03 23:14:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793312108] [2023-08-03 23:14:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:36,194 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 23:14:36,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:36,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793312108] [2023-08-03 23:14:36,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793312108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:14:36,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:14:36,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:14:36,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110115262] [2023-08-03 23:14:36,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:14:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:14:36,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:14:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:14:36,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 283 [2023-08-03 23:14:36,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:36,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:36,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 283 [2023-08-03 23:14:36,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:15:46,343 INFO L124 PetriNetUnfolderBase]: 633758/831886 cut-off events. [2023-08-03 23:15:46,343 INFO L125 PetriNetUnfolderBase]: For 9494/9494 co-relation queries the response was YES. [2023-08-03 23:15:48,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635317 conditions, 831886 events. 633758/831886 cut-off events. For 9494/9494 co-relation queries the response was YES. Maximal size of possible extension queue 25430. Compared 6518698 event pairs, 105182 based on Foata normal form. 17577/751753 useless extension candidates. Maximal degree in co-relation 1376859. Up to 729279 conditions per place. [2023-08-03 23:15:50,866 INFO L140 encePairwiseOnDemand]: 277/283 looper letters, 75 selfloop transitions, 3 changer transitions 0/94 dead transitions. [2023-08-03 23:15:50,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 401 flow [2023-08-03 23:15:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:15:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:15:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-03 23:15:50,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806831566548881 [2023-08-03 23:15:50,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-03 23:15:50,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-03 23:15:50,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:15:50,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-03 23:15:50,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 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 23:15:50,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 23:15:50,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 23:15:50,871 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 156 flow. Second operand 3 states and 493 transitions. [2023-08-03 23:15:50,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 401 flow [2023-08-03 23:15:50,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 395 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:15:50,879 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 169 flow [2023-08-03 23:15:50,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-03 23:15:50,880 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-03 23:15:50,880 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 169 flow [2023-08-03 23:15:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:50,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:15:50,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:15:50,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:15:50,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:15:50,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:15:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1365275874, now seen corresponding path program 1 times [2023-08-03 23:15:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:15:50,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104566192] [2023-08-03 23:15:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:15:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:15:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:15:50,908 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 23:15:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:15:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104566192] [2023-08-03 23:15:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104566192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:15:50,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:15:50,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:15:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767802834] [2023-08-03 23:15:50,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:15:50,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:15:50,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:15:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:15:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:15:50,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 283 [2023-08-03 23:15:50,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 23:15:50,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:15:50,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 283 [2023-08-03 23:15:50,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:05,047 INFO L124 PetriNetUnfolderBase]: 618374/800449 cut-off events. [2023-08-03 23:17:05,048 INFO L125 PetriNetUnfolderBase]: For 61758/61758 co-relation queries the response was YES. [2023-08-03 23:17:06,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689324 conditions, 800449 events. 618374/800449 cut-off events. For 61758/61758 co-relation queries the response was YES. Maximal size of possible extension queue 23946. Compared 5855038 event pairs, 518026 based on Foata normal form. 0/705060 useless extension candidates. Maximal degree in co-relation 1112369. Up to 771849 conditions per place. [2023-08-03 23:17:09,767 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 48 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-03 23:17:09,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 282 flow [2023-08-03 23:17:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-03 23:17:09,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5312131919905771 [2023-08-03 23:17:09,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-03 23:17:09,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-03 23:17:09,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:09,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-03 23:17:09,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 23:17:09,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 23:17:09,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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 23:17:09,772 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 169 flow. Second operand 3 states and 451 transitions. [2023-08-03 23:17:09,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 282 flow [2023-08-03 23:17:09,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:17:09,795 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 178 flow [2023-08-03 23:17:09,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-03 23:17:09,796 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2023-08-03 23:17:09,796 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 178 flow [2023-08-03 23:17:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 23:17:09,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:09,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:09,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 23:17:09,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:17:09,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1557355709, now seen corresponding path program 1 times [2023-08-03 23:17:09,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803853986] [2023-08-03 23:17:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:09,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:09,811 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:17:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:09,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:17:09,825 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:17:09,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:17:09,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:17:09,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:17:09,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:17:09,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 23:17:09,826 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 23:17:09,826 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:17:09,829 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:17:09,829 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:17:09,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:17:09 BasicIcfg [2023-08-03 23:17:09,876 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:17:09,877 INFO L158 Benchmark]: Toolchain (without parser) took 278772.83ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 488.8MB in the beginning and 9.7GB in the end (delta: -9.2GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2023-08-03 23:17:09,877 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 343.9MB. Free memory was 293.2MB in the beginning and 293.0MB in the end (delta: 122.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:17:09,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.81ms. Allocated memory is still 541.1MB. Free memory was 488.4MB in the beginning and 464.6MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-03 23:17:09,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.70ms. Allocated memory is still 541.1MB. Free memory was 464.6MB in the beginning and 462.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:17:09,878 INFO L158 Benchmark]: Boogie Preprocessor took 43.17ms. Allocated memory is still 541.1MB. Free memory was 462.1MB in the beginning and 460.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:17:09,878 INFO L158 Benchmark]: RCFGBuilder took 687.32ms. Allocated memory is still 541.1MB. Free memory was 460.0MB in the beginning and 501.0MB in the end (delta: -41.0MB). Peak memory consumption was 38.3MB. Max. memory is 16.0GB. [2023-08-03 23:17:09,878 INFO L158 Benchmark]: TraceAbstraction took 277453.59ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 500.2MB in the beginning and 9.7GB in the end (delta: -9.2GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2023-08-03 23:17:09,879 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 343.9MB. Free memory was 293.2MB in the beginning and 293.0MB in the end (delta: 122.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 530.81ms. Allocated memory is still 541.1MB. Free memory was 488.4MB in the beginning and 464.6MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.70ms. Allocated memory is still 541.1MB. Free memory was 464.6MB in the beginning and 462.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.17ms. Allocated memory is still 541.1MB. Free memory was 462.1MB in the beginning and 460.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 687.32ms. Allocated memory is still 541.1MB. Free memory was 460.0MB in the beginning and 501.0MB in the end (delta: -41.0MB). Peak memory consumption was 38.3MB. Max. memory is 16.0GB. * TraceAbstraction took 277453.59ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 500.2MB in the beginning and 9.7GB in the end (delta: -9.2GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 111 PlacesBefore, 34 PlacesAfterwards, 106 TransitionsBefore, 27 TransitionsAfterwards, 1666 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 85 TotalNumberOfCompositions, 3737 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2021, independent: 1899, independent conditional: 0, independent unconditional: 1899, dependent: 122, dependent conditional: 0, dependent unconditional: 122, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 850, independent: 832, independent conditional: 0, independent unconditional: 832, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2021, independent: 1067, independent conditional: 0, independent unconditional: 1067, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 850, unknown conditional: 0, unknown unconditional: 850] , Statistics on independence cache: Total cache size (in pairs): 100, Positive cache size: 92, Positive conditional cache size: 0, Positive unconditional cache size: 92, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 145 PlacesBefore, 65 PlacesAfterwards, 134 TransitionsBefore, 52 TransitionsAfterwards, 4732 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 89 TotalNumberOfCompositions, 17915 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7585, independent: 7251, independent conditional: 0, independent unconditional: 7251, dependent: 334, dependent conditional: 0, dependent unconditional: 334, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2256, independent: 2208, independent conditional: 0, independent unconditional: 2208, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7585, independent: 5043, independent conditional: 0, independent unconditional: 5043, dependent: 286, dependent conditional: 0, dependent unconditional: 286, unknown: 2256, unknown conditional: 0, unknown unconditional: 2256] , Statistics on independence cache: Total cache size (in pairs): 467, Positive cache size: 443, Positive conditional cache size: 0, Positive unconditional cache size: 443, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 171 PlacesBefore, 72 PlacesAfterwards, 163 TransitionsBefore, 60 TransitionsAfterwards, 7632 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 4 ChoiceCompositions, 120 TotalNumberOfCompositions, 28783 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10957, independent: 10528, independent conditional: 0, independent unconditional: 10528, dependent: 429, dependent conditional: 0, dependent unconditional: 429, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3863, independent: 3794, independent conditional: 0, independent unconditional: 3794, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10957, independent: 6734, independent conditional: 0, independent unconditional: 6734, dependent: 360, dependent conditional: 0, dependent unconditional: 360, unknown: 3863, unknown conditional: 0, unknown unconditional: 3863] , Statistics on independence cache: Total cache size (in pairs): 580, Positive cache size: 544, Positive conditional cache size: 0, Positive unconditional cache size: 544, Negative cache size: 36, Negative conditional cache size: 0, Negative unconditional cache size: 36, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p1_EAX = 0; [L713] 0 int __unbuffered_p1_EBX = 0; [L715] 0 int __unbuffered_p2_EAX = 0; [L717] 0 int __unbuffered_p2_EBX = 0; [L719] 0 int a = 0; [L720] 0 _Bool a$flush_delayed; [L721] 0 int a$mem_tmp; [L722] 0 _Bool a$r_buff0_thd0; [L723] 0 _Bool a$r_buff0_thd1; [L724] 0 _Bool a$r_buff0_thd2; [L725] 0 _Bool a$r_buff0_thd3; [L726] 0 _Bool a$r_buff1_thd0; [L727] 0 _Bool a$r_buff1_thd1; [L728] 0 _Bool a$r_buff1_thd2; [L729] 0 _Bool a$r_buff1_thd3; [L730] 0 _Bool a$read_delayed; [L731] 0 int *a$read_delayed_var; [L732] 0 int a$w_buff0; [L733] 0 _Bool a$w_buff0_used; [L734] 0 int a$w_buff1; [L735] 0 _Bool a$w_buff1_used; [L736] 0 _Bool main$tmp_guard0; [L737] 0 _Bool main$tmp_guard1; [L739] 0 int x = 0; [L741] 0 int y = 0; [L743] 0 int z = 0; [L744] 0 _Bool weak$$choice0; [L745] 0 _Bool weak$$choice2; [L848] 0 pthread_t t281[2]; [L849] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=0, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=0, a$w_buff0_used=0, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t281={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L849] COND TRUE 0 asdf<2 [L849] FCALL, FORK 0 pthread_create(&t281[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=0, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=0, a$w_buff0_used=0, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t281[asdf], ((void *)0), P0, ((void *)0))=-1, t281={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L749] 1 a$w_buff1 = a$w_buff0 [L750] 1 a$w_buff0 = 1 [L751] 1 a$w_buff1_used = a$w_buff0_used [L752] 1 a$w_buff0_used = (_Bool)1 [L753] CALL 1 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L753] RET 1 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L754] 1 a$r_buff1_thd0 = a$r_buff0_thd0 [L755] 1 a$r_buff1_thd1 = a$r_buff0_thd1 [L756] 1 a$r_buff1_thd2 = a$r_buff0_thd2 [L757] 1 a$r_buff1_thd3 = a$r_buff0_thd3 [L758] 1 a$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L849] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t281={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L849] COND TRUE 0 asdf<2 [L849] FCALL, FORK 0 pthread_create(&t281[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t281[asdf], ((void *)0), P0, ((void *)0))=0, t281={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L749] 2 a$w_buff1 = a$w_buff0 [L750] 2 a$w_buff0 = 1 [L751] 2 a$w_buff1_used = a$w_buff0_used [L752] 2 a$w_buff0_used = (_Bool)1 [L753] CALL 2 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=1, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=1, a$w_buff1_used=1, a=0, expression=1, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 159 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 187 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 116.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 110.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 368 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 312 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 764 IncrementalHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 4 mSDtfsCounter, 764 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1155 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 138/158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 187 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 157.0s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 153.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 46 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 179 IncrementalHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 1 mSDtfsCounter, 179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 23:17:09,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...