/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_rfi009_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:57:09,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:57:09,080 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:57:09,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:57:09,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:57:09,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:57:09,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:57:09,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:57:09,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:57:09,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:57:09,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:57:09,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:57:09,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:57:09,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:57:09,109 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:57:09,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:57:09,111 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:57:09,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:57:09,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:57:09,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:57:09,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:57:09,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:57:09,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:57:09,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:57:09,113 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:57:09,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:57:09,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:57:09,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:57:09,270 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:57:09,270 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:57:09,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-03 23:57:10,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:57:10,462 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:57:10,463 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-03 23:57:10,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb699445/41f5067c6eba4f3ba0b91d708c97e031/FLAGe768e892e [2023-08-03 23:57:10,489 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cb699445/41f5067c6eba4f3ba0b91d708c97e031 [2023-08-03 23:57:10,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:57:10,491 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:57:10,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:57:10,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:57:10,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:57:10,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5684e842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10, skipping insertion in model container [2023-08-03 23:57:10,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,521 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:57:10,645 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_rfi009_power.oepc_bound2.i[994,1007] [2023-08-03 23:57:10,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:57:10,844 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:57:10,853 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_rfi009_power.oepc_bound2.i[994,1007] [2023-08-03 23:57:10,869 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:57:10,871 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:57:10,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:57:10,946 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:57:10,949 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:57:10,953 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:57:10,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10 WrapperNode [2023-08-03 23:57:10,954 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:57:10,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:57:10,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:57:10,955 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:57:10,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,985 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 162 [2023-08-03 23:57:10,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:57:10,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:57:10,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:57:10,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:57:10,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:10,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:57:11,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:57:11,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:57:11,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:57:11,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (1/1) ... [2023-08-03 23:57:11,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:57:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:11,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:57:11,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:57:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 23:57:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:57:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:57:11,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:57:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:57:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:57:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:57:11,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:57:11,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:57:11,124 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:57:11,225 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:57:11,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:57:11,485 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:57:11,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:57:11,793 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:57:11,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:57:11 BoogieIcfgContainer [2023-08-03 23:57:11,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:57:11,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:57:11,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:57:11,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:57:11,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:57:10" (1/3) ... [2023-08-03 23:57:11,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3da10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:57:11, skipping insertion in model container [2023-08-03 23:57:11,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:10" (2/3) ... [2023-08-03 23:57:11,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3da10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:57:11, skipping insertion in model container [2023-08-03 23:57:11,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:57:11" (3/3) ... [2023-08-03 23:57:11,802 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-03 23:57:11,807 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:57:11,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:57:11,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 23:57:11,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:57:11,854 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:57:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:57:11,954 INFO L124 PetriNetUnfolderBase]: 30/462 cut-off events. [2023-08-03 23:57:11,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:11,961 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 1926 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-03 23:57:11,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:57:11,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:11,966 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:11,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:11,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:11,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:11,995 INFO L124 PetriNetUnfolderBase]: 6/230 cut-off events. [2023-08-03 23:57:11,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:11,996 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 600 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 23:57:11,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 1190 [2023-08-03 23:57:16,612 INFO L134 LiptonReduction]: Checked pairs total: 2688 [2023-08-03 23:57:16,612 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-03 23:57:16,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:57:16,624 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;@1a8322c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:16,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:57:16,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:16,646 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-03 23:57:16,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:16,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:16,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:57:16,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:16,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash -883093679, now seen corresponding path program 1 times [2023-08-03 23:57:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350289232] [2023-08-03 23:57:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:57:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:16,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350289232] [2023-08-03 23:57:16,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350289232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:16,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:16,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:57:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873110764] [2023-08-03 23:57:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:57:16,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 245 [2023-08-03 23:57:16,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:16,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:16,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 245 [2023-08-03 23:57:16,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:16,982 INFO L124 PetriNetUnfolderBase]: 266/472 cut-off events. [2023-08-03 23:57:16,982 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-03 23:57:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 472 events. 266/472 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1926 event pairs, 204 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 969. Up to 450 conditions per place. [2023-08-03 23:57:16,986 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 20 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-03 23:57:16,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 111 flow [2023-08-03 23:57:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:57:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:57:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-03 23:57:16,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537414965986395 [2023-08-03 23:57:16,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-03 23:57:16,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-03 23:57:16,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:16,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-03 23:57:17,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:17,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:17,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:17,008 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 407 transitions. [2023-08-03 23:57:17,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 111 flow [2023-08-03 23:57:17,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:57:17,011 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-03 23:57:17,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-03 23:57:17,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 23:57:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-03 23:57:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:57:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:57:17,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:17,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -894900337, now seen corresponding path program 1 times [2023-08-03 23:57:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396178977] [2023-08-03 23:57:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:57:17,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:57:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:57:17,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:57:17,080 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:57:17,081 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:57:17,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:57:17,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:57:17,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:57:17,082 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:57:17,084 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:57:17,084 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:57:17,084 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:57:17,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:57:17,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:57:17,226 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-03 23:57:17,227 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9293 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-03 23:57:17,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:57:17,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:17,233 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:17,233 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:17,234 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:17,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:17,274 INFO L124 PetriNetUnfolderBase]: 12/592 cut-off events. [2023-08-03 23:57:17,275 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:17,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 592 events. 12/592 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2855 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 485. Up to 27 conditions per place. [2023-08-03 23:57:17,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2023-08-03 23:57:23,209 INFO L134 LiptonReduction]: Checked pairs total: 10241 [2023-08-03 23:57:23,209 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-03 23:57:23,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:57:23,219 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;@1a8322c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:23,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:57:23,238 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:23,239 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2023-08-03 23:57:23,239 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:57:23,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:23,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:23,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:23,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:23,240 INFO L85 PathProgramCache]: Analyzing trace with hash -482466874, now seen corresponding path program 1 times [2023-08-03 23:57:23,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:23,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471758588] [2023-08-03 23:57:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:23,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:57:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471758588] [2023-08-03 23:57:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471758588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:23,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:23,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:57:23,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86001721] [2023-08-03 23:57:23,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:23,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:23,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:23,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:57:23,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:57:23,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:23,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:23,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:57:23,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:30,876 INFO L124 PetriNetUnfolderBase]: 36860/50232 cut-off events. [2023-08-03 23:57:30,876 INFO L125 PetriNetUnfolderBase]: For 3606/3606 co-relation queries the response was YES. [2023-08-03 23:57:31,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102671 conditions, 50232 events. 36860/50232 cut-off events. For 3606/3606 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 315109 event pairs, 29454 based on Foata normal form. 0/49470 useless extension candidates. Maximal degree in co-relation 29280. Up to 47970 conditions per place. [2023-08-03 23:57:31,220 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-03 23:57:31,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 192 flow [2023-08-03 23:57:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:57:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:57:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-03 23:57:31,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723039215686274 [2023-08-03 23:57:31,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-03 23:57:31,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-03 23:57:31,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:31,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-03 23:57:31,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:31,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:31,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:31,227 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 467 transitions. [2023-08-03 23:57:31,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 192 flow [2023-08-03 23:57:31,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 186 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:57:31,234 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-03 23:57:31,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:57:31,236 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-03 23:57:31,236 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-03 23:57:31,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:31,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:31,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:57:31,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:57:31,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:31,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash -169704640, now seen corresponding path program 1 times [2023-08-03 23:57:31,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:31,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10577450] [2023-08-03 23:57:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:31,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:57:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10577450] [2023-08-03 23:57:31,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10577450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:31,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983081155] [2023-08-03 23:57:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:31,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:31,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:57:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:31,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:57:31,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:57:31,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983081155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:31,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:31,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:57:31,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425994532] [2023-08-03 23:57:31,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:57:31,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:57:31,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:31,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:31,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:57:31,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:39,055 INFO L124 PetriNetUnfolderBase]: 36848/50193 cut-off events. [2023-08-03 23:57:39,055 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-03 23:57:39,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102263 conditions, 50193 events. 36848/50193 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 1654. Compared 314690 event pairs, 23904 based on Foata normal form. 9/49458 useless extension candidates. Maximal degree in co-relation 36543. Up to 47923 conditions per place. [2023-08-03 23:57:39,281 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 35 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-03 23:57:39,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 214 flow [2023-08-03 23:57:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:57:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:57:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 23:57:39,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551470588235294 [2023-08-03 23:57:39,283 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 23:57:39,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 23:57:39,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:39,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 23:57:39,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:39,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:39,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:39,287 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 755 transitions. [2023-08-03 23:57:39,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 214 flow [2023-08-03 23:57:39,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:57:39,290 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-03 23:57:39,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:57:39,290 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-03 23:57:39,290 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-03 23:57:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:39,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:39,291 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:39,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:57:39,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:39,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:39,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2135806777, now seen corresponding path program 1 times [2023-08-03 23:57:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:39,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72708484] [2023-08-03 23:57:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:57:39,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72708484] [2023-08-03 23:57:39,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72708484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550890928] [2023-08-03 23:57:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:39,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:39,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:39,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:57:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:39,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:57:39,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:39,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550890928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:57:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945101870] [2023-08-03 23:57:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:39,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:57:39,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:39,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:39,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:57:39,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:46,318 INFO L124 PetriNetUnfolderBase]: 35806/48472 cut-off events. [2023-08-03 23:57:46,319 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-03 23:57:46,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99323 conditions, 48472 events. 35806/48472 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 300618 event pairs, 27838 based on Foata normal form. 0/47980 useless extension candidates. Maximal degree in co-relation 28384. Up to 46264 conditions per place. [2023-08-03 23:57:46,613 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 38 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 23:57:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 236 flow [2023-08-03 23:57:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:57:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:57:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-03 23:57:46,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2023-08-03 23:57:46,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-03 23:57:46,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-03 23:57:46,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:46,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-03 23:57:46,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,618 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 472 transitions. [2023-08-03 23:57:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 236 flow [2023-08-03 23:57:46,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 229 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:57:46,620 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-03 23:57:46,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:57:46,622 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-03 23:57:46,622 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-03 23:57:46,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:46,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:46,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:46,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:46,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:46,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1627518948, now seen corresponding path program 1 times [2023-08-03 23:57:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129936035] [2023-08-03 23:57:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:57:46,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129936035] [2023-08-03 23:57:46,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129936035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:46,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154710184] [2023-08-03 23:57:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:46,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:46,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:57:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:47,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:57:47,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:57:47,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:57:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:57:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154710184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:57:47,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:57:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:57:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250864] [2023-08-03 23:57:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:57:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:57:47,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:47,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:47,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:57:47,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:52,890 INFO L124 PetriNetUnfolderBase]: 28183/37688 cut-off events. [2023-08-03 23:57:52,890 INFO L125 PetriNetUnfolderBase]: For 2628/2628 co-relation queries the response was YES. [2023-08-03 23:57:52,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77562 conditions, 37688 events. 28183/37688 cut-off events. For 2628/2628 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 220299 event pairs, 17577 based on Foata normal form. 3/37502 useless extension candidates. Maximal degree in co-relation 27599. Up to 36121 conditions per place. [2023-08-03 23:57:53,086 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-03 23:57:53,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 229 flow [2023-08-03 23:57:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-03 23:57:53,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615808823529411 [2023-08-03 23:57:53,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-03 23:57:53,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-03 23:57:53,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:53,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-03 23:57:53,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:53,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:53,092 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:53,092 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 611 transitions. [2023-08-03 23:57:53,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 229 flow [2023-08-03 23:57:53,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:57:53,093 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-03 23:57:53,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:57:53,094 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-03 23:57:53,094 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-03 23:57:53,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:53,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:53,095 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:53,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:53,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:53,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:53,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1147609362, now seen corresponding path program 1 times [2023-08-03 23:57:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:53,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5614200] [2023-08-03 23:57:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:53,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5614200] [2023-08-03 23:57:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5614200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651862985] [2023-08-03 23:57:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:53,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:53,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:53,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:57:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:53,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:57:53,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:53,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651862985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:53,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:57:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745092631] [2023-08-03 23:57:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:57:53,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:57:53,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:53,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:53,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:57:53,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:59,015 INFO L124 PetriNetUnfolderBase]: 27775/37321 cut-off events. [2023-08-03 23:57:59,015 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-03 23:57:59,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76737 conditions, 37321 events. 27775/37321 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 221631 event pairs, 7042 based on Foata normal form. 144/37276 useless extension candidates. Maximal degree in co-relation 27290. Up to 34755 conditions per place. [2023-08-03 23:57:59,229 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 51 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-08-03 23:57:59,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 293 flow [2023-08-03 23:57:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:57:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:57:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 770 transitions. [2023-08-03 23:57:59,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2023-08-03 23:57:59,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 770 transitions. [2023-08-03 23:57:59,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 770 transitions. [2023-08-03 23:57:59,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:59,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 770 transitions. [2023-08-03 23:57:59,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:59,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:59,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:59,236 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 770 transitions. [2023-08-03 23:57:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 293 flow [2023-08-03 23:57:59,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:57:59,239 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-03 23:57:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:57:59,240 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-03 23:57:59,240 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-03 23:57:59,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:59,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:59,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:59,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:59,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:59,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:59,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:59,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1050954275, now seen corresponding path program 1 times [2023-08-03 23:57:59,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:59,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400363894] [2023-08-03 23:57:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:59,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400363894] [2023-08-03 23:57:59,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400363894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35994304] [2023-08-03 23:57:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:59,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:59,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:57:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:59,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:57:59,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:59,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:57:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35994304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:57:59,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:57:59,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:57:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686283981] [2023-08-03 23:57:59,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:57:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:59,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:59,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:57:59,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:59,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:59,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:57:59,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:04,604 INFO L124 PetriNetUnfolderBase]: 23296/31042 cut-off events. [2023-08-03 23:58:04,605 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2023-08-03 23:58:04,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64329 conditions, 31042 events. 23296/31042 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 177607 event pairs, 13702 based on Foata normal form. 36/30925 useless extension candidates. Maximal degree in co-relation 22827. Up to 28852 conditions per place. [2023-08-03 23:58:04,747 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 23:58:04,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 279 flow [2023-08-03 23:58:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:58:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:58:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-08-03 23:58:04,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5716911764705882 [2023-08-03 23:58:04,749 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-08-03 23:58:04,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-08-03 23:58:04,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:04,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-08-03 23:58:04,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:04,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:04,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:04,751 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 622 transitions. [2023-08-03 23:58:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 279 flow [2023-08-03 23:58:04,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 274 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:58:04,756 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-03 23:58:04,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:58:04,757 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-03 23:58:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-03 23:58:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:04,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:04,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:04,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 23:58:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:04,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:04,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 576029820, now seen corresponding path program 1 times [2023-08-03 23:58:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825013337] [2023-08-03 23:58:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:04,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:58:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825013337] [2023-08-03 23:58:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825013337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841466175] [2023-08-03 23:58:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:05,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:05,018 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:05,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:58:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:05,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:58:05,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:58:05,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841466175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:58:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824359374] [2023-08-03 23:58:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:58:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:58:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:05,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:58:05,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:05,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:05,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:58:05,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:08,121 INFO L124 PetriNetUnfolderBase]: 13312/18223 cut-off events. [2023-08-03 23:58:08,121 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2023-08-03 23:58:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38682 conditions, 18223 events. 13312/18223 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 100603 event pairs, 952 based on Foata normal form. 2304/20374 useless extension candidates. Maximal degree in co-relation 15245. Up to 13200 conditions per place. [2023-08-03 23:58:08,159 INFO L140 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2023-08-03 23:58:08,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 294 flow [2023-08-03 23:58:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:58:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:58:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-03 23:58:08,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790441176470589 [2023-08-03 23:58:08,161 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-03 23:58:08,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-03 23:58:08,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:08,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-03 23:58:08,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:08,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:08,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:08,164 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 630 transitions. [2023-08-03 23:58:08,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 294 flow [2023-08-03 23:58:08,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:58:08,225 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-03 23:58:08,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, 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} [2023-08-03 23:58:08,225 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-03 23:58:08,225 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-03 23:58:08,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:08,225 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:58:08,226 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:58:08,226 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:58:08,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:08,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:08,434 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:08,435 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:58:08,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:58:08,509 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-03 23:58:08,509 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:58:08,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9293 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-03 23:58:08,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:58:08,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:08,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:58:08,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:08,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:08,568 INFO L124 PetriNetUnfolderBase]: 66/1038 cut-off events. [2023-08-03 23:58:08,569 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-03 23:58:08,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 1038 events. 66/1038 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6338 event pairs, 0 based on Foata normal form. 0/933 useless extension candidates. Maximal degree in co-relation 779. Up to 54 conditions per place. [2023-08-03 23:58:08,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 4356 [2023-08-03 23:58:14,427 INFO L134 LiptonReduction]: Checked pairs total: 13157 [2023-08-03 23:58:14,428 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-03 23:58:14,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:58:14,429 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;@1a8322c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:58:14,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 23:58:14,432 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:58:14,432 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-03 23:58:14,432 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 23:58:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:14,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:14,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:58:14,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1645021000, now seen corresponding path program 1 times [2023-08-03 23:58:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171912151] [2023-08-03 23:58:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:14,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171912151] [2023-08-03 23:58:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171912151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:14,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:58:14,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:58:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760019272] [2023-08-03 23:58:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:14,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:14,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:58:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:58:14,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:14,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:14,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:58:14,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:42,168 INFO L124 PetriNetUnfolderBase]: 155552/201513 cut-off events. [2023-08-03 23:58:42,169 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2023-08-03 23:58:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403646 conditions, 201513 events. 155552/201513 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 5436. Compared 1265968 event pairs, 126978 based on Foata normal form. 5292/195615 useless extension candidates. Maximal degree in co-relation 115493. Up to 198414 conditions per place. [2023-08-03 23:58:43,144 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 37 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-03 23:58:43,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 198 flow [2023-08-03 23:58:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-03 23:58:43,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543859649122806 [2023-08-03 23:58:43,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-03 23:58:43,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-03 23:58:43,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:43,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-03 23:58:43,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:43,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:43,148 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:43,148 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 474 transitions. [2023-08-03 23:58:43,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 198 flow [2023-08-03 23:58:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:58:43,150 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-03 23:58:43,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, 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} [2023-08-03 23:58:43,151 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-03 23:58:43,151 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-03 23:58:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:43,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:43,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:43,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:58:43,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:58:43,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 775863959, now seen corresponding path program 1 times [2023-08-03 23:58:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:43,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316104329] [2023-08-03 23:58:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:43,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316104329] [2023-08-03 23:58:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316104329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196868325] [2023-08-03 23:58:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:43,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:43,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:58:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:43,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:58:43,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:58:43,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196868325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:43,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:43,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:58:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978958848] [2023-08-03 23:58:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:43,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:43,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:43,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:43,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:58:43,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:43,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:43,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:58:43,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:06,956 INFO L124 PetriNetUnfolderBase]: 131638/169000 cut-off events. [2023-08-03 23:59:06,956 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-03 23:59:07,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340037 conditions, 169000 events. 131638/169000 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4567. Compared 1028813 event pairs, 104770 based on Foata normal form. 0/163420 useless extension candidates. Maximal degree in co-relation 340000. Up to 167305 conditions per place. [2023-08-03 23:59:07,829 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 43 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 23:59:07,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 228 flow [2023-08-03 23:59:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-03 23:59:07,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2023-08-03 23:59:07,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-03 23:59:07,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-03 23:59:07,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:07,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-03 23:59:07,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:07,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:07,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:07,833 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 477 transitions. [2023-08-03 23:59:07,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 228 flow [2023-08-03 23:59:07,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:07,836 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-03 23:59:07,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, 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=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-03 23:59:07,836 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-03 23:59:07,836 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-03 23:59:07,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:07,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:07,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:07,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 23:59:08,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:08,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:08,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:08,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1221005052, now seen corresponding path program 1 times [2023-08-03 23:59:08,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:08,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664718308] [2023-08-03 23:59:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:08,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:59:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664718308] [2023-08-03 23:59:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664718308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528291338] [2023-08-03 23:59:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:08,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:08,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:08,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 23:59:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:08,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:59:08,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:08,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:08,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528291338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:08,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:08,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:59:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646980638] [2023-08-03 23:59:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:08,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:59:08,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:08,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:08,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:59:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:31,011 INFO L124 PetriNetUnfolderBase]: 129222/165726 cut-off events. [2023-08-03 23:59:31,011 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-03 23:59:31,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333925 conditions, 165726 events. 129222/165726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4602. Compared 989199 event pairs, 101118 based on Foata normal form. 0/160671 useless extension candidates. Maximal degree in co-relation 95808. Up to 159021 conditions per place. [2023-08-03 23:59:32,054 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 23:59:32,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 264 flow [2023-08-03 23:59:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-03 23:59:32,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649122807017544 [2023-08-03 23:59:32,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-03 23:59:32,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-03 23:59:32,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:32,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-03 23:59:32,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,058 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 483 transitions. [2023-08-03 23:59:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 264 flow [2023-08-03 23:59:32,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:32,061 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-03 23:59:32,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-03 23:59:32,061 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-03 23:59:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-03 23:59:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:32,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:32,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:32,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 23:59:32,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:32,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:32,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1334323821, now seen corresponding path program 1 times [2023-08-03 23:59:32,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539317075] [2023-08-03 23:59:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:32,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:32,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:32,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539317075] [2023-08-03 23:59:32,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539317075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:32,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819560007] [2023-08-03 23:59:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:32,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:32,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 23:59:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:32,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:32,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:32,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819560007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:32,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:32,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:59:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584134035] [2023-08-03 23:59:32,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:32,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 23:59:32,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:32,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:32,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 23:59:32,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:50,895 INFO L124 PetriNetUnfolderBase]: 101278/128552 cut-off events. [2023-08-03 23:59:50,896 INFO L125 PetriNetUnfolderBase]: For 9501/9501 co-relation queries the response was YES. [2023-08-03 23:59:51,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267146 conditions, 128552 events. 101278/128552 cut-off events. For 9501/9501 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 730573 event pairs, 66426 based on Foata normal form. 3/128366 useless extension candidates. Maximal degree in co-relation 94838. Up to 127384 conditions per place. [2023-08-03 23:59:51,601 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 42 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-03 23:59:51,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 248 flow [2023-08-03 23:59:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-03 23:59:51,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412280701754386 [2023-08-03 23:59:51,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-03 23:59:51,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-03 23:59:51,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:51,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-03 23:59:51,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,606 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 617 transitions. [2023-08-03 23:59:51,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 248 flow [2023-08-03 23:59:51,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:51,610 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-03 23:59:51,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-03 23:59:51,610 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-03 23:59:51,610 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-03 23:59:51,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:51,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:51,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:51,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 23:59:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 23:59:51,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:51,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash -677486591, now seen corresponding path program 1 times [2023-08-03 23:59:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:51,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508135871] [2023-08-03 23:59:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:51,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:51,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508135871] [2023-08-03 23:59:51,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508135871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:51,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980950651] [2023-08-03 23:59:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:51,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:51,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 23:59:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:51,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:51,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:52,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:52,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980950651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:52,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:52,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:52,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309182693] [2023-08-03 23:59:52,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:52,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:52,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:52,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 23:59:52,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:52,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:52,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 23:59:52,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:08,042 INFO L124 PetriNetUnfolderBase]: 84352/106246 cut-off events. [2023-08-04 00:00:08,047 INFO L125 PetriNetUnfolderBase]: For 6813/6813 co-relation queries the response was YES. [2023-08-04 00:00:08,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220094 conditions, 106246 events. 84352/106246 cut-off events. For 6813/6813 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 591913 event pairs, 52642 based on Foata normal form. 36/106129 useless extension candidates. Maximal degree in co-relation 78012. Up to 104044 conditions per place. [2023-08-04 00:00:08,786 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 53 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-04 00:00:08,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 304 flow [2023-08-04 00:00:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:00:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:00:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-04 00:00:08,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2023-08-04 00:00:08,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-04 00:00:08,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-04 00:00:08,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:08,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-04 00:00:08,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:08,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 00:00:08,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 00:00:08,805 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 628 transitions. [2023-08-04 00:00:08,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 304 flow [2023-08-04 00:00:08,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:00:08,811 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-04 00:00:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-04 00:00:08,811 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 00:00:08,811 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-04 00:00:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 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 00:00:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:08,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 00:00:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:00:09,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:09,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1866545605, now seen corresponding path program 1 times [2023-08-04 00:00:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718981464] [2023-08-04 00:00:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:00:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:09,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718981464] [2023-08-04 00:00:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718981464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:09,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400213447] [2023-08-04 00:00:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:09,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:09,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:00:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:09,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:00:09,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:00:09,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:00:09,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400213447] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:09,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:09,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:00:09,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551911273] [2023-08-04 00:00:09,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:09,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:00:09,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:00:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:00:09,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 00:00:09,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 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 00:00:09,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:09,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 00:00:09,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand