/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/weaver_popl20-more-min-array-hom.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:07:14,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:07:14,235 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:07:14,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:07:14,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:07:14,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:07:14,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:07:14,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:07:14,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:07:14,272 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:07:14,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:07:14,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:07:14,273 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:07:14,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:07:14,275 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:07:14,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:07:14,275 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:07:14,275 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:07:14,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:07:14,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:07:14,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:07:14,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:07:14,276 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:07:14,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:07:14,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:07:14,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:07:14,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:07:14,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:07:14,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:07:14,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:07:14,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:07:14,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:07:14,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:07:14,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:07:14,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:07:14,281 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:07:14,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:07:14,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:07:14,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:07:14,500 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:07:14,500 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:07:14,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array-hom.wvr_bound2.c [2023-08-04 03:07:15,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:07:15,793 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:07:15,793 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array-hom.wvr_bound2.c [2023-08-04 03:07:15,799 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e81a08be/7ea5a7c854dd4f6fb11dd8895021c44a/FLAG61fb95839 [2023-08-04 03:07:15,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e81a08be/7ea5a7c854dd4f6fb11dd8895021c44a [2023-08-04 03:07:15,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:07:15,812 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:07:15,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:07:15,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:07:15,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:07:15,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:07:15" (1/1) ... [2023-08-04 03:07:15,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b15c0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:15, skipping insertion in model container [2023-08-04 03:07:15,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:07:15" (1/1) ... [2023-08-04 03:07:15,843 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:07:16,001 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 03:07:16,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:07:16,019 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:07:16,059 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 03:07:16,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:07:16,074 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:07:16,074 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:07:16,079 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:07:16,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16 WrapperNode [2023-08-04 03:07:16,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:07:16,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:07:16,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:07:16,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:07:16,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,099 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,122 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-04 03:07:16,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:07:16,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:07:16,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:07:16,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:07:16,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:07:16,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:07:16,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:07:16,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:07:16,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (1/1) ... [2023-08-04 03:07:16,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:07:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:16,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:07:16,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:07:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:07:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:07:16,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:07:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:07:16,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:07:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:07:16,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:07:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:07:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:07:16,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:07:16,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:07:16,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:07:16,248 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:07:16,376 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:07:16,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:07:16,649 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:07:16,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:07:16,714 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:07:16,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:07:16 BoogieIcfgContainer [2023-08-04 03:07:16,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:07:16,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:07:16,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:07:16,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:07:16,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:07:15" (1/3) ... [2023-08-04 03:07:16,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44902d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:07:16, skipping insertion in model container [2023-08-04 03:07:16,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:16" (2/3) ... [2023-08-04 03:07:16,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44902d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:07:16, skipping insertion in model container [2023-08-04 03:07:16,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:07:16" (3/3) ... [2023-08-04 03:07:16,723 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-min-array-hom.wvr_bound2.c [2023-08-04 03:07:16,729 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:07:16,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:07:16,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:07:16,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:07:16,807 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:07:16,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,098 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 03:07:17,099 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:07:17,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 03:07:17,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,132 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:07:17,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:07:17,263 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 03:07:17,263 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:07:17,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 101/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3250 event pairs, 0 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 386. Up to 16 conditions per place. [2023-08-04 03:07:17,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 03:07:22,499 INFO L134 LiptonReduction]: Checked pairs total: 8734 [2023-08-04 03:07:22,500 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 03:07:22,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:07:22,519 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;@1f0b96e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:07:22,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:07:22,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:07:22,525 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 03:07:22,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:07:22,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:22,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:07:22,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:22,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -244124324, now seen corresponding path program 1 times [2023-08-04 03:07:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784661104] [2023-08-04 03:07:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:07:23,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784661104] [2023-08-04 03:07:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784661104] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:23,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:07:23,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:07:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177878628] [2023-08-04 03:07:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:23,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:07:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:07:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:07:23,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 361 [2023-08-04 03:07:23,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 49 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 03:07:23,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:23,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 361 [2023-08-04 03:07:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:23,427 INFO L124 PetriNetUnfolderBase]: 2307/3250 cut-off events. [2023-08-04 03:07:23,427 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-04 03:07:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 3250 events. 2307/3250 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15269 event pairs, 1053 based on Foata normal form. 0/1868 useless extension candidates. Maximal degree in co-relation 5016. Up to 3086 conditions per place. [2023-08-04 03:07:23,438 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 19 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 03:07:23,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-04 03:07:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 03:07:23,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47645429362880887 [2023-08-04 03:07:23,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 03:07:23,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 03:07:23,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:23,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 03:07:23,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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 03:07:23,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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 03:07:23,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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 03:07:23,478 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 516 transitions. [2023-08-04 03:07:23,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-04 03:07:23,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:07:23,485 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 79 flow [2023-08-04 03:07:23,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 03:07:23,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 03:07:23,491 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 79 flow [2023-08-04 03:07:23,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 03:07:23,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:23,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:07:23,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:23,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash -466663387, now seen corresponding path program 1 times [2023-08-04 03:07:23,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:23,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794181634] [2023-08-04 03:07:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:23,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:07:23,545 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:07:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:07:23,585 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:07:23,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:07:23,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:07:23,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:07:23,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:07:23,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:07:23,588 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:07:23,590 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:07:23,591 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:07:23,591 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:07:23,618 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:07:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,173 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:07:24,173 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:07:24,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 03:07:24,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:07:24,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:07:24,656 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:07:24,656 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:07:24,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 03:07:24,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:07:29,905 INFO L134 LiptonReduction]: Checked pairs total: 26775 [2023-08-04 03:07:29,905 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 03:07:29,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:07:29,908 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;@1f0b96e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:07:29,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:07:29,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:07:29,916 INFO L124 PetriNetUnfolderBase]: 16/117 cut-off events. [2023-08-04 03:07:29,916 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:07:29,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:29,916 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:07:29,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:29,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash 551128001, now seen corresponding path program 1 times [2023-08-04 03:07:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:29,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803169392] [2023-08-04 03:07:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:29,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:07:29,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:29,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803169392] [2023-08-04 03:07:29,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803169392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:29,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852392062] [2023-08-04 03:07:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:30,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:07:30,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:07:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:30,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:07:30,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:07:30,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:07:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852392062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:30,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:07:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:07:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118175443] [2023-08-04 03:07:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:07:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:07:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:07:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:07:30,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:07:30,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:30,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:07:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:52,160 INFO L124 PetriNetUnfolderBase]: 285360/341734 cut-off events. [2023-08-04 03:07:52,161 INFO L125 PetriNetUnfolderBase]: For 33715/33715 co-relation queries the response was YES. [2023-08-04 03:07:52,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693432 conditions, 341734 events. 285360/341734 cut-off events. For 33715/33715 co-relation queries the response was YES. Maximal size of possible extension queue 6453. Compared 1646852 event pairs, 99744 based on Foata normal form. 0/191930 useless extension candidates. Maximal degree in co-relation 226063. Up to 330728 conditions per place. [2023-08-04 03:07:53,125 INFO L140 encePairwiseOnDemand]: 418/423 looper letters, 34 selfloop transitions, 5 changer transitions 31/81 dead transitions. [2023-08-04 03:07:53,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 382 flow [2023-08-04 03:07:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:07:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:07:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 979 transitions. [2023-08-04 03:07:53,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628841607565012 [2023-08-04 03:07:53,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 979 transitions. [2023-08-04 03:07:53,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 979 transitions. [2023-08-04 03:07:53,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:53,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 979 transitions. [2023-08-04 03:07:53,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 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 03:07:53,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:07:53,136 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:07:53,136 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 5 states and 979 transitions. [2023-08-04 03:07:53,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 382 flow [2023-08-04 03:07:53,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:07:53,170 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 133 flow [2023-08-04 03:07:53,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-04 03:07:53,171 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 03:07:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 133 flow [2023-08-04 03:07:53,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:07:53,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:53,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:53,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:07:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:53,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:53,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash -837665607, now seen corresponding path program 1 times [2023-08-04 03:07:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701112020] [2023-08-04 03:07:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:53,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:07:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701112020] [2023-08-04 03:07:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701112020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:53,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:07:53,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:07:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687970118] [2023-08-04 03:07:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:07:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:07:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:07:53,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-04 03:07:53,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 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 03:07:53,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:53,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-04 03:07:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:56,033 INFO L124 PetriNetUnfolderBase]: 37829/44907 cut-off events. [2023-08-04 03:07:56,033 INFO L125 PetriNetUnfolderBase]: For 1554/1554 co-relation queries the response was YES. [2023-08-04 03:07:56,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91240 conditions, 44907 events. 37829/44907 cut-off events. For 1554/1554 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 165176 event pairs, 16071 based on Foata normal form. 1/25162 useless extension candidates. Maximal degree in co-relation 26119. Up to 43863 conditions per place. [2023-08-04 03:07:56,474 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 32 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 03:07:56,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 204 flow [2023-08-04 03:07:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-04 03:07:56,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594168636721828 [2023-08-04 03:07:56,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-04 03:07:56,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-04 03:07:56,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:56,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-04 03:07:56,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:07:56,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:07:56,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:07:56,482 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 133 flow. Second operand 3 states and 583 transitions. [2023-08-04 03:07:56,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 204 flow [2023-08-04 03:07:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 199 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:07:56,487 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 127 flow [2023-08-04 03:07:56,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 03:07:56,489 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -11 predicate places. [2023-08-04 03:07:56,489 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 127 flow [2023-08-04 03:07:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 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 03:07:56,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:07:56,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:56,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash 272464353, now seen corresponding path program 1 times [2023-08-04 03:07:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386248762] [2023-08-04 03:07:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:07:56,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386248762] [2023-08-04 03:07:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386248762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925975550] [2023-08-04 03:07:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:56,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:07:56,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:07:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:56,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:07:56,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:07:56,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:07:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:07:56,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925975550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:07:56,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:07:56,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:07:56,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754910293] [2023-08-04 03:07:56,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:07:56,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:07:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:07:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:07:56,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:07:56,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:07:56,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:56,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:07:56,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:58,748 INFO L124 PetriNetUnfolderBase]: 29885/35202 cut-off events. [2023-08-04 03:07:58,748 INFO L125 PetriNetUnfolderBase]: For 958/958 co-relation queries the response was YES. [2023-08-04 03:07:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71266 conditions, 35202 events. 29885/35202 cut-off events. For 958/958 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 122199 event pairs, 9795 based on Foata normal form. 3/19638 useless extension candidates. Maximal degree in co-relation 51513. Up to 34386 conditions per place. [2023-08-04 03:07:58,921 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 34 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 03:07:58,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 212 flow [2023-08-04 03:07:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:07:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:07:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2023-08-04 03:07:58,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45271867612293143 [2023-08-04 03:07:58,925 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2023-08-04 03:07:58,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2023-08-04 03:07:58,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:58,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2023-08-04 03:07:58,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 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 03:07:58,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:07:58,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:07:58,932 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 127 flow. Second operand 4 states and 766 transitions. [2023-08-04 03:07:58,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 212 flow [2023-08-04 03:07:58,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:07:58,934 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 124 flow [2023-08-04 03:07:58,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, 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=124, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-04 03:07:58,936 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:07:58,936 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 124 flow [2023-08-04 03:07:58,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:07:58,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:58,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:58,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:07:59,148 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 [2023-08-04 03:07:59,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:59,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2070696792, now seen corresponding path program 1 times [2023-08-04 03:07:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:59,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260466215] [2023-08-04 03:07:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:07:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:59,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260466215] [2023-08-04 03:07:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260466215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024047054] [2023-08-04 03:07:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:59,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:59,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:59,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:07:59,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:07:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:59,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:07:59,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:07:59,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:07:59,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024047054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:59,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:07:59,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:07:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028250952] [2023-08-04 03:07:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:07:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:07:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:07:59,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:07:59,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:07:59,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:59,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:07:59,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:01,357 INFO L124 PetriNetUnfolderBase]: 27665/33261 cut-off events. [2023-08-04 03:08:01,357 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2023-08-04 03:08:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66940 conditions, 33261 events. 27665/33261 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 128453 event pairs, 4237 based on Foata normal form. 0/18885 useless extension candidates. Maximal degree in co-relation 24164. Up to 31128 conditions per place. [2023-08-04 03:08:01,508 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 47 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-04 03:08:01,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 268 flow [2023-08-04 03:08:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:08:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:08:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 962 transitions. [2023-08-04 03:08:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548463356973995 [2023-08-04 03:08:01,511 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 962 transitions. [2023-08-04 03:08:01,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 962 transitions. [2023-08-04 03:08:01,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:01,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 962 transitions. [2023-08-04 03:08:01,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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 03:08:01,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:08:01,519 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:08:01,519 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 124 flow. Second operand 5 states and 962 transitions. [2023-08-04 03:08:01,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 268 flow [2023-08-04 03:08:01,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 261 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:08:01,522 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 136 flow [2023-08-04 03:08:01,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=5, PETRI_FLOW=136, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-04 03:08:01,522 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:08:01,523 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 136 flow [2023-08-04 03:08:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:08:01,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:01,523 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:01,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 03:08:01,729 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 [2023-08-04 03:08:01,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:01,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1195809152, now seen corresponding path program 1 times [2023-08-04 03:08:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62952001] [2023-08-04 03:08:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:08:01,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:01,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62952001] [2023-08-04 03:08:01,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62952001] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:01,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:08:01,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:08:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615002228] [2023-08-04 03:08:01,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:01,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:01,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:08:01,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-04 03:08:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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 03:08:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:01,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-04 03:08:01,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:03,660 INFO L124 PetriNetUnfolderBase]: 26273/31464 cut-off events. [2023-08-04 03:08:03,660 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2023-08-04 03:08:03,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63535 conditions, 31464 events. 26273/31464 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 118566 event pairs, 11329 based on Foata normal form. 9/17864 useless extension candidates. Maximal degree in co-relation 22894. Up to 30056 conditions per place. [2023-08-04 03:08:03,787 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 03:08:03,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 225 flow [2023-08-04 03:08:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-04 03:08:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256895193065406 [2023-08-04 03:08:03,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-04 03:08:03,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-04 03:08:03,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:03,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-04 03:08:03,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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 03:08:03,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:08:03,795 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:08:03,795 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 136 flow. Second operand 3 states and 587 transitions. [2023-08-04 03:08:03,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 225 flow [2023-08-04 03:08:03,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:08:03,797 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 134 flow [2023-08-04 03:08:03,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-04 03:08:03,799 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:08:03,799 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 134 flow [2023-08-04 03:08:03,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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 03:08:03,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:03,799 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:08:03,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:03,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:03,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2054806421, now seen corresponding path program 1 times [2023-08-04 03:08:03,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:03,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537856107] [2023-08-04 03:08:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:08:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537856107] [2023-08-04 03:08:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537856107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:03,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718503017] [2023-08-04 03:08:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:03,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:08:03,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:08:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:03,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:08:03,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:08:03,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:08:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:08:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718503017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:08:03,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:08:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:08:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417611380] [2023-08-04 03:08:03,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:08:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:03,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:08:03,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 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 03:08:03,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:03,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:08:03,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:05,334 INFO L124 PetriNetUnfolderBase]: 20873/24849 cut-off events. [2023-08-04 03:08:05,334 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-04 03:08:05,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50224 conditions, 24849 events. 20873/24849 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 89901 event pairs, 7009 based on Foata normal form. 27/14075 useless extension candidates. Maximal degree in co-relation 18049. Up to 23180 conditions per place. [2023-08-04 03:08:05,605 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 43 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 03:08:05,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 253 flow [2023-08-04 03:08:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:08:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:08:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2023-08-04 03:08:05,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574468085106383 [2023-08-04 03:08:05,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2023-08-04 03:08:05,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2023-08-04 03:08:05,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:05,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2023-08-04 03:08:05,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 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 03:08:05,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:08:05,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:08:05,612 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 134 flow. Second operand 4 states and 774 transitions. [2023-08-04 03:08:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 253 flow [2023-08-04 03:08:05,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:08:05,613 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 131 flow [2023-08-04 03:08:05,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=131, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-04 03:08:05,614 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-04 03:08:05,614 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 131 flow [2023-08-04 03:08:05,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 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 03:08:05,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:05,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:05,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:08:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:05,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:05,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1631704265, now seen corresponding path program 1 times [2023-08-04 03:08:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:05,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044710144] [2023-08-04 03:08:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:05,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:08:05,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044710144] [2023-08-04 03:08:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044710144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957340313] [2023-08-04 03:08:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:05,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:08:05,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:08:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:05,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:08:05,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:08:06,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957340313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:06,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:06,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:08:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251343695] [2023-08-04 03:08:06,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:06,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:06,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:08:06,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:08:06,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 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 03:08:06,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:06,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:08:06,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:07,223 INFO L124 PetriNetUnfolderBase]: 15041/18045 cut-off events. [2023-08-04 03:08:07,224 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-04 03:08:07,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36670 conditions, 18045 events. 15041/18045 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65300 event pairs, 703 based on Foata normal form. 729/10889 useless extension candidates. Maximal degree in co-relation 14872. Up to 7614 conditions per place. [2023-08-04 03:08:07,253 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 03:08:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 317 flow [2023-08-04 03:08:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:08:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:08:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2023-08-04 03:08:07,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595744680851064 [2023-08-04 03:08:07,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2023-08-04 03:08:07,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2023-08-04 03:08:07,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:07,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2023-08-04 03:08:07,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 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 03:08:07,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:08:07,262 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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 03:08:07,262 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 131 flow. Second operand 5 states and 972 transitions. [2023-08-04 03:08:07,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 317 flow [2023-08-04 03:08:07,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:08:07,280 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-04 03:08:07,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-04 03:08:07,280 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:08:07,280 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-04 03:08:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 185.8) internal successors, (929), 5 states have internal predecessors, (929), 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 03:08:07,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:08:07,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:08:07,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:08:07,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:08:07,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:07,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:07,488 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:08:07,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:07,789 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:08:07,790 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:07,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 03:08:07,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:07,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:07,826 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:08:07,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:07,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:07,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:08:08,137 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:08:08,137 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4824 conditions, 4150 events. 891/4150 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33086 event pairs, 11 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 2464. Up to 192 conditions per place. [2023-08-04 03:08:08,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:08:13,147 INFO L134 LiptonReduction]: Checked pairs total: 26762 [2023-08-04 03:08:13,147 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-04 03:08:13,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:08:13,149 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;@1f0b96e3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:08:13,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:08:13,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:08:13,152 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:08:13,152 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:08:13,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:13,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:13,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:13,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1296424842, now seen corresponding path program 1 times [2023-08-04 03:08:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929311828] [2023-08-04 03:08:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:08:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929311828] [2023-08-04 03:08:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929311828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:13,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:08:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:08:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914281022] [2023-08-04 03:08:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:08:13,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 03:08:13,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:08:13,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:13,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 03:08:13,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:34,369 INFO L124 PetriNetUnfolderBase]: 282571/337077 cut-off events. [2023-08-04 03:08:34,369 INFO L125 PetriNetUnfolderBase]: For 35136/35136 co-relation queries the response was YES. [2023-08-04 03:08:35,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685367 conditions, 337077 events. 282571/337077 cut-off events. For 35136/35136 co-relation queries the response was YES. Maximal size of possible extension queue 6409. Compared 1591214 event pairs, 121223 based on Foata normal form. 0/188813 useless extension candidates. Maximal degree in co-relation 224693. Up to 327405 conditions per place. [2023-08-04 03:08:36,224 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 03:08:36,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 03:08:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 03:08:36,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834123222748815 [2023-08-04 03:08:36,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 03:08:36,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 03:08:36,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:36,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 03:08:36,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:08:36,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 03:08:36,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 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 03:08:36,231 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 612 transitions. [2023-08-04 03:08:36,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 03:08:36,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:08:36,264 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 03:08:36,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 03:08:36,265 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 03:08:36,265 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 03:08:36,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:08:36,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:36,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:36,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 03:08:36,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:36,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash -855984737, now seen corresponding path program 1 times [2023-08-04 03:08:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:36,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159402340] [2023-08-04 03:08:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:36,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:08:36,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:36,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159402340] [2023-08-04 03:08:36,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159402340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:36,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754333754] [2023-08-04 03:08:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:36,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:36,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:36,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:08:36,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:08:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:36,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:08:36,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:08:36,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:36,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754333754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:36,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:08:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822334683] [2023-08-04 03:08:36,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:36,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 03:08:36,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 03:08:36,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:36,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 03:08:36,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand