/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_safe020_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:49:54,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:49:54,409 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:49:54,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:49:54,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:49:54,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:49:54,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:49:54,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:49:54,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:49:54,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:49:54,430 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:49:54,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:49:54,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:49:54,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:49:54,431 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:49:54,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:49:54,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:49:54,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:49:54,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:49:54,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:49:54,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:49:54,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:49:54,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:49:54,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:49:54,433 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:49:54,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:49:54,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:49:54,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:49:54,435 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:49:54,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:49:54,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:49:54,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:49:54,611 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:49:54,611 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:49:54,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe020_rmo_bound2.i [2023-08-04 00:49:55,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:49:55,617 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:49:55,617 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe020_rmo_bound2.i [2023-08-04 00:49:55,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29087acb5/fa58c62f231f48e782073949ef2f35c9/FLAGe75003211 [2023-08-04 00:49:55,640 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29087acb5/fa58c62f231f48e782073949ef2f35c9 [2023-08-04 00:49:55,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:49:55,643 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:49:55,643 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:49:55,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:49:55,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:49:55,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:49:55" (1/1) ... [2023-08-04 00:49:55,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a512af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:55, skipping insertion in model container [2023-08-04 00:49:55,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:49:55" (1/1) ... [2023-08-04 00:49:55,675 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:49:55,778 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_safe020_rmo_bound2.i[988,1001] [2023-08-04 00:49:55,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:49:55,934 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:49:55,941 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_safe020_rmo_bound2.i[988,1001] [2023-08-04 00:49:55,958 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:49:55,959 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:49:56,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:49:56,025 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:49:56,025 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:49:56,030 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:49:56,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56 WrapperNode [2023-08-04 00:49:56,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:49:56,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:49:56,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:49:56,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:49:56,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,080 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 160 [2023-08-04 00:49:56,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:49:56,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:49:56,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:49:56,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:49:56,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:49:56,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:49:56,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:49:56,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:49:56,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (1/1) ... [2023-08-04 00:49:56,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:49:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:49:56,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:49:56,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:49:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:49:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:49:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:49:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:49:56,182 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:49:56,294 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:49:56,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:49:56,584 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:49:56,726 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:49:56,726 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:49:56,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:49:56 BoogieIcfgContainer [2023-08-04 00:49:56,728 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:49:56,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:49:56,730 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:49:56,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:49:56,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:49:55" (1/3) ... [2023-08-04 00:49:56,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b2e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:49:56, skipping insertion in model container [2023-08-04 00:49:56,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:49:56" (2/3) ... [2023-08-04 00:49:56,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b2e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:49:56, skipping insertion in model container [2023-08-04 00:49:56,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:49:56" (3/3) ... [2023-08-04 00:49:56,733 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe020_rmo_bound2.i [2023-08-04 00:49:56,738 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:49:56,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:49:56,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:49:56,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:49:56,784 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:49:56,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:49:56,887 INFO L124 PetriNetUnfolderBase]: 30/462 cut-off events. [2023-08-04 00:49:56,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:49:56,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 462 events. 30/462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1913 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 283. Up to 16 conditions per place. [2023-08-04 00:49:56,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:49:56,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 115 transitions, 245 flow [2023-08-04 00:49:56,900 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:49:56,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:49:56,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:49:56,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 115 transitions, 245 flow [2023-08-04 00:49:56,934 INFO L124 PetriNetUnfolderBase]: 6/230 cut-off events. [2023-08-04 00:49:56,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:49:56,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 6/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 596 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2023-08-04 00:49:56,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 1160 [2023-08-04 00:50:01,047 INFO L134 LiptonReduction]: Checked pairs total: 3035 [2023-08-04 00:50:01,047 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 00:50:01,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:50:01,060 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;@1605fb40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:50:01,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:50:01,064 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:50:01,064 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:50:01,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:50:01,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:50:01,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:01,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1894174579, now seen corresponding path program 1 times [2023-08-04 00:50:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:01,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66340979] [2023-08-04 00:50:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:01,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:50:01,155 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:50:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:50:01,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:50:01,188 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:50:01,188 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:50:01,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:50:01,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:50:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:50:01,190 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:50:01,192 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:50:01,192 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:50:01,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:50:01,219 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:50:01,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 166 transitions, 368 flow [2023-08-04 00:50:01,328 INFO L124 PetriNetUnfolderBase]: 93/1385 cut-off events. [2023-08-04 00:50:01,328 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:50:01,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 1385 events. 93/1385 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9282 event pairs, 0 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 1008. Up to 54 conditions per place. [2023-08-04 00:50:01,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 166 transitions, 368 flow [2023-08-04 00:50:01,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 137 transitions, 310 flow [2023-08-04 00:50:01,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:50:01,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 137 transitions, 310 flow [2023-08-04 00:50:01,336 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 137 transitions, 310 flow [2023-08-04 00:50:01,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 137 transitions, 310 flow [2023-08-04 00:50:01,399 INFO L124 PetriNetUnfolderBase]: 12/602 cut-off events. [2023-08-04 00:50:01,399 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:50:01,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 602 events. 12/602 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2930 event pairs, 0 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 486. Up to 27 conditions per place. [2023-08-04 00:50:01,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 3152 [2023-08-04 00:50:05,480 INFO L134 LiptonReduction]: Checked pairs total: 9746 [2023-08-04 00:50:05,480 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 00:50:05,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:50:05,482 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;@1605fb40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:50:05,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:50:05,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:50:05,488 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2023-08-04 00:50:05,488 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:50:05,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:05,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:05,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:05,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1687779690, now seen corresponding path program 1 times [2023-08-04 00:50:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:05,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152014693] [2023-08-04 00:50:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:50:05,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152014693] [2023-08-04 00:50:05,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152014693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:50:05,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:50:05,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:50:05,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906801591] [2023-08-04 00:50:05,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:50:05,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:50:05,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:50:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:50:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 268 [2023-08-04 00:50:05,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:05,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:05,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 268 [2023-08-04 00:50:05,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:14,468 INFO L124 PetriNetUnfolderBase]: 64827/86050 cut-off events. [2023-08-04 00:50:14,469 INFO L125 PetriNetUnfolderBase]: For 6008/6008 co-relation queries the response was YES. [2023-08-04 00:50:14,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176829 conditions, 86050 events. 64827/86050 cut-off events. For 6008/6008 co-relation queries the response was YES. Maximal size of possible extension queue 2454. Compared 521795 event pairs, 50940 based on Foata normal form. 0/84689 useless extension candidates. Maximal degree in co-relation 40573. Up to 83344 conditions per place. [2023-08-04 00:50:14,936 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 00:50:14,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 200 flow [2023-08-04 00:50:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:50:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:50:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-04 00:50:14,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5696517412935324 [2023-08-04 00:50:14,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-04 00:50:14,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-04 00:50:14,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:14,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-04 00:50:14,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:14,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:14,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:14,968 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 458 transitions. [2023-08-04 00:50:14,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 200 flow [2023-08-04 00:50:14,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 194 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:50:14,981 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-04 00:50:14,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-04 00:50:14,986 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 00:50:14,987 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-04 00:50:14,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:14,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:14,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:50:14,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:50:14,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:14,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1611302440, now seen corresponding path program 1 times [2023-08-04 00:50:14,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:14,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78739484] [2023-08-04 00:50:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:14,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:50:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78739484] [2023-08-04 00:50:15,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78739484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:15,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491706377] [2023-08-04 00:50:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:15,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:15,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:15,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:50:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:15,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:50:15,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:50:15,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:50:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491706377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:50:15,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:50:15,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:50:15,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435615720] [2023-08-04 00:50:15,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:50:15,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:50:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:50:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:50:15,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 268 [2023-08-04 00:50:15,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:15,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:15,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 268 [2023-08-04 00:50:15,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:24,182 INFO L124 PetriNetUnfolderBase]: 64803/86054 cut-off events. [2023-08-04 00:50:24,182 INFO L125 PetriNetUnfolderBase]: For 5324/5324 co-relation queries the response was YES. [2023-08-04 00:50:24,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176212 conditions, 86054 events. 64803/86054 cut-off events. For 5324/5324 co-relation queries the response was YES. Maximal size of possible extension queue 2451. Compared 522288 event pairs, 39840 based on Foata normal form. 16/84749 useless extension candidates. Maximal degree in co-relation 46355. Up to 83261 conditions per place. [2023-08-04 00:50:24,876 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 40 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-04 00:50:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 230 flow [2023-08-04 00:50:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:50:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:50:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 740 transitions. [2023-08-04 00:50:24,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522388059701493 [2023-08-04 00:50:24,878 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 740 transitions. [2023-08-04 00:50:24,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 740 transitions. [2023-08-04 00:50:24,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:24,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 740 transitions. [2023-08-04 00:50:24,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:24,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:24,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:24,883 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 740 transitions. [2023-08-04 00:50:24,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 230 flow [2023-08-04 00:50:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:50:24,884 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-04 00:50:24,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-04 00:50:24,886 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 00:50:24,886 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-04 00:50:24,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:24,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:24,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:24,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:50:25,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:25,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:25,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2090401876, now seen corresponding path program 1 times [2023-08-04 00:50:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369671520] [2023-08-04 00:50:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:50:25,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369671520] [2023-08-04 00:50:25,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369671520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354064186] [2023-08-04 00:50:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:25,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:25,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:25,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:50:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:25,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:50:25,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:50:25,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:50:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354064186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:50:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:50:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:50:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537767645] [2023-08-04 00:50:25,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:50:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:50:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:50:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:50:25,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 268 [2023-08-04 00:50:25,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:25,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:25,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 268 [2023-08-04 00:50:25,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:33,888 INFO L124 PetriNetUnfolderBase]: 62916/86227 cut-off events. [2023-08-04 00:50:33,888 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-04 00:50:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174121 conditions, 86227 events. 62916/86227 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 2661. Compared 563146 event pairs, 49614 based on Foata normal form. 0/84786 useless extension candidates. Maximal degree in co-relation 39790. Up to 80321 conditions per place. [2023-08-04 00:50:34,337 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 42 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 00:50:34,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 248 flow [2023-08-04 00:50:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:50:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:50:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-04 00:50:34,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771144278606966 [2023-08-04 00:50:34,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-04 00:50:34,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-04 00:50:34,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:34,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-04 00:50:34,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:34,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:34,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:34,342 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 464 transitions. [2023-08-04 00:50:34,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 248 flow [2023-08-04 00:50:34,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 241 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:50:34,344 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-04 00:50:34,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-04 00:50:34,348 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-04 00:50:34,349 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-04 00:50:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:34,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:34,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:34,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:50:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 00:50:34,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:34,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1674474894, now seen corresponding path program 1 times [2023-08-04 00:50:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:34,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386059874] [2023-08-04 00:50:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:50:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386059874] [2023-08-04 00:50:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386059874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753372593] [2023-08-04 00:50:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:34,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:34,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:34,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:50:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:34,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:50:34,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:50:34,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:50:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:50:34,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753372593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:50:34,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:50:34,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:50:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603960971] [2023-08-04 00:50:34,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:50:34,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:50:34,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:50:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:50:34,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 268 [2023-08-04 00:50:34,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:34,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:34,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 268 [2023-08-04 00:50:34,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:42,042 INFO L124 PetriNetUnfolderBase]: 52458/71117 cut-off events. [2023-08-04 00:50:42,042 INFO L125 PetriNetUnfolderBase]: For 4616/4616 co-relation queries the response was YES. [2023-08-04 00:50:42,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144285 conditions, 71117 events. 52458/71117 cut-off events. For 4616/4616 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 444520 event pairs, 31248 based on Foata normal form. 4/70272 useless extension candidates. Maximal degree in co-relation 37817. Up to 66569 conditions per place. [2023-08-04 00:50:42,403 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 41 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-04 00:50:42,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 245 flow [2023-08-04 00:50:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:50:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:50:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-04 00:50:42,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2023-08-04 00:50:42,405 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-04 00:50:42,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-04 00:50:42,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:42,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-04 00:50:42,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:42,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:42,408 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:42,408 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 600 transitions. [2023-08-04 00:50:42,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 245 flow [2023-08-04 00:50:42,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:50:42,410 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-04 00:50:42,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 00:50:42,411 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:50:42,411 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-04 00:50:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:42,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:42,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:50:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:42,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:42,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1250189101, now seen corresponding path program 1 times [2023-08-04 00:50:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615968256] [2023-08-04 00:50:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:50:42,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615968256] [2023-08-04 00:50:42,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615968256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043982874] [2023-08-04 00:50:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:42,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:42,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:42,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:50:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:42,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:50:42,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:50:42,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:50:42,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043982874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:50:42,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:50:42,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:50:42,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263066015] [2023-08-04 00:50:42,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:50:42,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:50:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:42,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:50:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:50:42,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 268 [2023-08-04 00:50:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 268 [2023-08-04 00:50:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:49,698 INFO L124 PetriNetUnfolderBase]: 51690/70477 cut-off events. [2023-08-04 00:50:49,698 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2023-08-04 00:50:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142514 conditions, 70477 events. 51690/70477 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 2380. Compared 446699 event pairs, 12522 based on Foata normal form. 256/70076 useless extension candidates. Maximal degree in co-relation 37341. Up to 64016 conditions per place. [2023-08-04 00:50:50,029 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 59 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-04 00:50:50,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 321 flow [2023-08-04 00:50:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:50:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:50:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-04 00:50:50,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656716417910448 [2023-08-04 00:50:50,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-04 00:50:50,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-04 00:50:50,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:50,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-04 00:50:50,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:50,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:50,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:50,035 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 758 transitions. [2023-08-04 00:50:50,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 321 flow [2023-08-04 00:50:50,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:50:50,037 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-04 00:50:50,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2023-08-04 00:50:50,038 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 00:50:50,038 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-04 00:50:50,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:50,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:50,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:50,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:50:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:50,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:50,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -33779755, now seen corresponding path program 1 times [2023-08-04 00:50:50,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:50,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469433112] [2023-08-04 00:50:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:50:50,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469433112] [2023-08-04 00:50:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469433112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482011744] [2023-08-04 00:50:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:50,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:50:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:50,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:50:50,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:50:50,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:50:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:50:50,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482011744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:50:50,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:50:50,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:50:50,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077156299] [2023-08-04 00:50:50,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:50:50,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:50:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:50:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:50:50,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 268 [2023-08-04 00:50:50,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:50,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:50,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 268 [2023-08-04 00:50:50,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:50:56,198 INFO L124 PetriNetUnfolderBase]: 43290/58493 cut-off events. [2023-08-04 00:50:56,198 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-04 00:50:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119262 conditions, 58493 events. 43290/58493 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 355347 event pairs, 26154 based on Foata normal form. 64/58028 useless extension candidates. Maximal degree in co-relation 31201. Up to 53081 conditions per place. [2023-08-04 00:50:56,513 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 53 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-04 00:50:56,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 299 flow [2023-08-04 00:50:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:50:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:50:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-04 00:50:56,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708955223880597 [2023-08-04 00:50:56,515 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-04 00:50:56,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-04 00:50:56,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:50:56,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-04 00:50:56,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:56,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:56,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:56,517 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 612 transitions. [2023-08-04 00:50:56,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 299 flow [2023-08-04 00:50:56,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:50:56,520 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-04 00:50:56,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-04 00:50:56,520 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-04 00:50:56,520 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-04 00:50:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.4) internal successors, (712), 5 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:56,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:50:56,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:50:56,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 00:50:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:56,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:50:56,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:50:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1152216034, now seen corresponding path program 1 times [2023-08-04 00:50:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:50:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492773735] [2023-08-04 00:50:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:50:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:50:56,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:50:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492773735] [2023-08-04 00:50:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492773735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:50:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435169632] [2023-08-04 00:50:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:50:56,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:50:56,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:56,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:50:56,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:50:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:50:56,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:50:56,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:50:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:50:56,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:50:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435169632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:50:56,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:50:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:50:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205716923] [2023-08-04 00:50:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:50:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:50:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:50:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:50:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:50:56,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 268 [2023-08-04 00:50:56,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:50:56,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:50:56,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 268 [2023-08-04 00:50:56,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:00,441 INFO L124 PetriNetUnfolderBase]: 24858/34685 cut-off events. [2023-08-04 00:51:00,441 INFO L125 PetriNetUnfolderBase]: For 3818/3818 co-relation queries the response was YES. [2023-08-04 00:51:00,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72222 conditions, 34685 events. 24858/34685 cut-off events. For 3818/3818 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 203687 event pairs, 1818 based on Foata normal form. 4096/38764 useless extension candidates. Maximal degree in co-relation 28177. Up to 24320 conditions per place. [2023-08-04 00:51:00,534 INFO L140 encePairwiseOnDemand]: 266/268 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-08-04 00:51:00,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 314 flow [2023-08-04 00:51:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:51:00,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783582089552238 [2023-08-04 00:51:00,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:51:00,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:51:00,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:00,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:51:00,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:00,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:00,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:00,541 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:51:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 314 flow [2023-08-04 00:51:00,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:51:00,726 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 00:51:00,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 00:51:00,727 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:51:00,727 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 00:51:00,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:00,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:51:00,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:51:00,727 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:51:00,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:51:00,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:00,929 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:00,929 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:51:00,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 166 transitions, 368 flow [2023-08-04 00:51:01,007 INFO L124 PetriNetUnfolderBase]: 93/1385 cut-off events. [2023-08-04 00:51:01,008 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:01,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 1385 events. 93/1385 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9282 event pairs, 0 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 1008. Up to 54 conditions per place. [2023-08-04 00:51:01,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 166 transitions, 368 flow [2023-08-04 00:51:01,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 151 transitions, 326 flow [2023-08-04 00:51:01,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:01,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 151 transitions, 326 flow [2023-08-04 00:51:01,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 151 transitions, 326 flow [2023-08-04 00:51:01,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 151 transitions, 326 flow [2023-08-04 00:51:01,070 INFO L124 PetriNetUnfolderBase]: 66/1048 cut-off events. [2023-08-04 00:51:01,070 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:51:01,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 1048 events. 66/1048 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6383 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 780. Up to 54 conditions per place. [2023-08-04 00:51:01,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-04 00:51:05,595 INFO L134 LiptonReduction]: Checked pairs total: 12903 [2023-08-04 00:51:05,595 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 00:51:05,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:51:05,603 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;@1605fb40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:05,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:51:05,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:05,606 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 00:51:05,606 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:51:05,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:05,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:05,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:05,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 997567864, now seen corresponding path program 1 times [2023-08-04 00:51:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695360389] [2023-08-04 00:51:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:51:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695360389] [2023-08-04 00:51:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695360389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:05,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848271124] [2023-08-04 00:51:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:05,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:51:05,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:05,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:05,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:51:05,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:40,305 INFO L124 PetriNetUnfolderBase]: 272349/356636 cut-off events. [2023-08-04 00:51:40,305 INFO L125 PetriNetUnfolderBase]: For 5332/5332 co-relation queries the response was YES. [2023-08-04 00:51:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706609 conditions, 356636 events. 272349/356636 cut-off events. For 5332/5332 co-relation queries the response was YES. Maximal size of possible extension queue 7836. Compared 2307503 event pairs, 218772 based on Foata normal form. 8820/344503 useless extension candidates. Maximal degree in co-relation 152744. Up to 343786 conditions per place. [2023-08-04 00:51:41,843 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 40 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-04 00:51:41,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 206 flow [2023-08-04 00:51:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 00:51:41,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516014234875445 [2023-08-04 00:51:41,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 00:51:41,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 00:51:41,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:41,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 00:51:41,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:41,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:41,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:41,847 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 465 transitions. [2023-08-04 00:51:41,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 206 flow [2023-08-04 00:51:41,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:51:41,849 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 00:51:41,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 00:51:41,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 00:51:41,850 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 00:51:41,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:41,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:41,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:51:41,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:51:41,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1533387356, now seen corresponding path program 1 times [2023-08-04 00:51:41,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:41,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876440042] [2023-08-04 00:51:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:41,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:51:41,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876440042] [2023-08-04 00:51:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876440042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630527686] [2023-08-04 00:51:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:41,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:41,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:41,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:51:41,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:51:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:41,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:51:41,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:51:41,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630527686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:51:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460548379] [2023-08-04 00:51:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:41,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:42,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:51:42,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:51:42,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:42,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:51:42,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand