/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-max-array-hom.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:05:50,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:05:50,410 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:05:50,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:05:50,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:05:50,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:05:50,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:05:50,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:05:50,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:05:50,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:05:50,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:05:50,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:05:50,452 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:05:50,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:05:50,453 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:05:50,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:05:50,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:05:50,454 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:05:50,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:05:50,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:05:50,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:05:50,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:05:50,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:05:50,455 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:05:50,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:05:50,457 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:05:50,457 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:05:50,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:05:50,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:05:50,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:05:50,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:05:50,459 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:05:50,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:05:50,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:05:50,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:05:50,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:05:50,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:05:50,460 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:05:50,460 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:05:50,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:05:50,460 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:05:50,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:05:50,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:05:50,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:05:50,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:05:50,676 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:05:50,676 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:05:50,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 03:05:51,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:05:51,967 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:05:51,968 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 03:05:51,975 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b8adbd2/3818f80f042a45238b749e5cc53df2e4/FLAGb9dce5ac3 [2023-08-04 03:05:51,994 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b8adbd2/3818f80f042a45238b749e5cc53df2e4 [2023-08-04 03:05:51,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:05:52,000 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:05:52,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:05:52,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:05:52,006 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:05:52,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:05:51" (1/1) ... [2023-08-04 03:05:52,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d038dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52, skipping insertion in model container [2023-08-04 03:05:52,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:05:51" (1/1) ... [2023-08-04 03:05:52,029 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:05:52,180 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-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 03:05:52,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:05:52,198 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:05:52,227 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-max-array-hom.wvr_bound2.c[2829,2842] [2023-08-04 03:05:52,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:05:52,234 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:05:52,234 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:05:52,245 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:05:52,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52 WrapperNode [2023-08-04 03:05:52,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:05:52,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:05:52,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:05:52,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:05:52,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,280 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-04 03:05:52,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:05:52,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:05:52,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:05:52,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:05:52,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:05:52,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:05:52,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:05:52,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:05:52,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (1/1) ... [2023-08-04 03:05:52,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:05:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:05:52,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:05:52,380 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 03:05:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:05:52,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:05:52,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:05:52,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:05:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:05:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:05:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:05:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:05:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:05:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:05:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:05:52,400 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 03:05:52,560 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:05:52,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:05:52,913 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:05:52,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:05:52,972 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:05:52,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:05:52 BoogieIcfgContainer [2023-08-04 03:05:52,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:05:52,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:05:52,975 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:05:52,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:05:52,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:05:51" (1/3) ... [2023-08-04 03:05:52,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5c7099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:05:52, skipping insertion in model container [2023-08-04 03:05:52,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:05:52" (2/3) ... [2023-08-04 03:05:52,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5c7099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:05:52, skipping insertion in model container [2023-08-04 03:05:52,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:05:52" (3/3) ... [2023-08-04 03:05:52,979 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-max-array-hom.wvr_bound2.c [2023-08-04 03:05:52,984 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:05:52,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:05:52,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:05:52,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:05:53,054 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:05:53,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,254 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 03:05:53,255 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:05:53,265 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 03:05:53,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,278 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:05:53,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 428 flow [2023-08-04 03:05:53,348 INFO L124 PetriNetUnfolderBase]: 101/661 cut-off events. [2023-08-04 03:05:53,348 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:05:53,351 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 03:05:53,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 03:05:57,806 INFO L134 LiptonReduction]: Checked pairs total: 8734 [2023-08-04 03:05:57,806 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 03:05:57,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:05:57,826 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;@4a4762e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:05:57,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:05:57,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:05:57,833 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 03:05:57,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:05:57,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:05:57,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:05:57,834 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 03:05:57,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:05:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -244124324, now seen corresponding path program 1 times [2023-08-04 03:05:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:05:57,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005043125] [2023-08-04 03:05:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:05:57,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:05:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:05:58,178 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 03:05:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:05:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005043125] [2023-08-04 03:05:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005043125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:05:58,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:05:58,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:05:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094431010] [2023-08-04 03:05:58,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:05:58,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:05:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:05:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:05:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:05:58,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 361 [2023-08-04 03:05:58,261 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 03:05:58,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:05:58,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 361 [2023-08-04 03:05:58,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:05:58,522 INFO L124 PetriNetUnfolderBase]: 2307/3250 cut-off events. [2023-08-04 03:05:58,522 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-04 03:05:58,526 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 03:05:58,533 INFO L140 encePairwiseOnDemand]: 357/361 looper letters, 19 selfloop transitions, 2 changer transitions 22/49 dead transitions. [2023-08-04 03:05:58,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 220 flow [2023-08-04 03:05:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:05:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:05:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 03:05:58,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47645429362880887 [2023-08-04 03:05:58,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 03:05:58,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 03:05:58,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:05:58,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 03:05:58,559 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 03:05:58,563 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 03:05:58,563 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 03:05:58,565 INFO L175 Difference]: Start difference. First operand has 43 places, 49 transitions, 140 flow. Second operand 3 states and 516 transitions. [2023-08-04 03:05:58,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 220 flow [2023-08-04 03:05:58,568 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 03:05:58,569 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 79 flow [2023-08-04 03:05:58,614 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 03:05:58,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 03:05:58,618 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 79 flow [2023-08-04 03:05:58,618 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 03:05:58,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:05:58,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:05:58,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:05:58,619 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 03:05:58,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:05:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash -466663387, now seen corresponding path program 1 times [2023-08-04 03:05:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:05:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051724352] [2023-08-04 03:05:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:05:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:05:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:05:58,645 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:05:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:05:58,686 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:05:58,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:05:58,688 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:05:58,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:05:58,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:05:58,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:05:58,690 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:05:58,692 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:05:58,692 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:05:58,692 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:05:58,719 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:05:58,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,108 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:05:59,108 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:05:59,136 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 03:05:59,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:05:59,158 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:05:59,518 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:05:59,519 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:05:59,546 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 03:05:59,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:06:03,838 INFO L134 LiptonReduction]: Checked pairs total: 26775 [2023-08-04 03:06:03,838 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 03:06:03,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:06:03,840 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;@4a4762e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:06:03,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:06:03,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:06:03,848 INFO L124 PetriNetUnfolderBase]: 16/117 cut-off events. [2023-08-04 03:06:03,848 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:06:03,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:03,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:06:03,852 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 03:06:03,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 551128001, now seen corresponding path program 1 times [2023-08-04 03:06:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214398125] [2023-08-04 03:06:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:03,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:03,931 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 03:06:03,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214398125] [2023-08-04 03:06:03,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214398125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:03,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103835710] [2023-08-04 03:06:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:03,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:03,947 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 03:06:03,948 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 03:06:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:04,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:06:04,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:04,046 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 03:06:04,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:06:04,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103835710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:04,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:06:04,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:06:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368555283] [2023-08-04 03:06:04,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:06:04,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:06:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:06:04,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:06:04,062 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 03:06:04,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:04,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:06:04,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:25,526 INFO L124 PetriNetUnfolderBase]: 285360/341734 cut-off events. [2023-08-04 03:06:25,541 INFO L125 PetriNetUnfolderBase]: For 33715/33715 co-relation queries the response was YES. [2023-08-04 03:06:26,511 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 03:06:26,892 INFO L140 encePairwiseOnDemand]: 418/423 looper letters, 34 selfloop transitions, 5 changer transitions 31/81 dead transitions. [2023-08-04 03:06:26,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 382 flow [2023-08-04 03:06:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:06:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:06:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 979 transitions. [2023-08-04 03:06:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628841607565012 [2023-08-04 03:06:26,895 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 979 transitions. [2023-08-04 03:06:26,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 979 transitions. [2023-08-04 03:06:26,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:26,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 979 transitions. [2023-08-04 03:06:26,898 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 03:06:26,902 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 03:06:26,903 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 03:06:26,903 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 5 states and 979 transitions. [2023-08-04 03:06:26,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 382 flow [2023-08-04 03:06:26,938 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 03:06:26,939 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 133 flow [2023-08-04 03:06:26,940 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 03:06:26,940 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 03:06:26,940 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 133 flow [2023-08-04 03:06:26,942 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 03:06:26,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:26,943 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:26,950 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 03:06:27,149 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 03:06:27,149 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 03:06:27,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash -837665607, now seen corresponding path program 1 times [2023-08-04 03:06:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:27,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886276470] [2023-08-04 03:06:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:27,370 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 03:06:27,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:27,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886276470] [2023-08-04 03:06:27,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886276470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:27,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:06:27,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:06:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851991956] [2023-08-04 03:06:27,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:27,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:06:27,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:06:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:06:27,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-04 03:06:27,388 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 03:06:27,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:27,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-04 03:06:27,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:29,996 INFO L124 PetriNetUnfolderBase]: 37829/44907 cut-off events. [2023-08-04 03:06:29,996 INFO L125 PetriNetUnfolderBase]: For 1554/1554 co-relation queries the response was YES. [2023-08-04 03:06:30,097 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 03:06:30,246 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 32 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 03:06:30,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 204 flow [2023-08-04 03:06:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:06:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:06:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-04 03:06:30,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594168636721828 [2023-08-04 03:06:30,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-04 03:06:30,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-04 03:06:30,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:30,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-04 03:06:30,250 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 03:06:30,252 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 03:06:30,252 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 03:06:30,252 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 133 flow. Second operand 3 states and 583 transitions. [2023-08-04 03:06:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 204 flow [2023-08-04 03:06:30,255 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 03:06:30,256 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 127 flow [2023-08-04 03:06:30,256 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 03:06:30,258 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -11 predicate places. [2023-08-04 03:06:30,258 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 127 flow [2023-08-04 03:06:30,259 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 03:06:30,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:30,259 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:30,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:06:30,259 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 03:06:30,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 272464353, now seen corresponding path program 1 times [2023-08-04 03:06:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:30,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677321569] [2023-08-04 03:06:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:30,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:30,310 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 03:06:30,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677321569] [2023-08-04 03:06:30,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677321569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692009784] [2023-08-04 03:06:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:30,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:30,312 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 03:06:30,315 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 03:06:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:30,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:06:30,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:30,400 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 03:06:30,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:06:30,424 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 03:06:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692009784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:06:30,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:06:30,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:06:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864184322] [2023-08-04 03:06:30,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:06:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:06:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:06:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:06:30,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:06:30,437 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 03:06:30,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:30,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:06:30,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:32,368 INFO L124 PetriNetUnfolderBase]: 29885/35202 cut-off events. [2023-08-04 03:06:32,368 INFO L125 PetriNetUnfolderBase]: For 958/958 co-relation queries the response was YES. [2023-08-04 03:06:32,465 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 03:06:32,565 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 34 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 03:06:32,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 212 flow [2023-08-04 03:06:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:06:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:06:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 766 transitions. [2023-08-04 03:06:32,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45271867612293143 [2023-08-04 03:06:32,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 766 transitions. [2023-08-04 03:06:32,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 766 transitions. [2023-08-04 03:06:32,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:32,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 766 transitions. [2023-08-04 03:06:32,570 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 03:06:32,572 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 03:06:32,573 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 03:06:32,573 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 127 flow. Second operand 4 states and 766 transitions. [2023-08-04 03:06:32,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 212 flow [2023-08-04 03:06:32,574 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 03:06:32,576 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 124 flow [2023-08-04 03:06:32,576 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 03:06:32,577 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:06:32,577 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 124 flow [2023-08-04 03:06:32,578 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 03:06:32,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:32,578 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:32,585 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 03:06:32,785 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 03:06:32,786 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 03:06:32,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2070696792, now seen corresponding path program 1 times [2023-08-04 03:06:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613221197] [2023-08-04 03:06:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:32,850 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 03:06:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613221197] [2023-08-04 03:06:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613221197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996052545] [2023-08-04 03:06:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:32,852 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 03:06:32,885 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 03:06:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:32,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:06:32,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:32,965 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 03:06:32,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:06:32,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996052545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:32,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:06:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:06:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762620571] [2023-08-04 03:06:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:06:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:06:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:06:32,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:06:32,987 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 03:06:32,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:32,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:06:32,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:34,866 INFO L124 PetriNetUnfolderBase]: 27665/33261 cut-off events. [2023-08-04 03:06:34,866 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2023-08-04 03:06:34,964 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 03:06:35,065 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 47 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-04 03:06:35,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 268 flow [2023-08-04 03:06:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:06:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:06:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 962 transitions. [2023-08-04 03:06:35,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4548463356973995 [2023-08-04 03:06:35,071 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 962 transitions. [2023-08-04 03:06:35,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 962 transitions. [2023-08-04 03:06:35,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:35,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 962 transitions. [2023-08-04 03:06:35,073 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 03:06:35,075 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 03:06:35,077 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 03:06:35,077 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 124 flow. Second operand 5 states and 962 transitions. [2023-08-04 03:06:35,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 268 flow [2023-08-04 03:06:35,078 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 03:06:35,079 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 136 flow [2023-08-04 03:06:35,079 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 03:06:35,081 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:06:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 136 flow [2023-08-04 03:06:35,082 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 03:06:35,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:35,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:35,101 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 03:06:35,286 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 03:06:35,286 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 03:06:35,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:35,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1195809152, now seen corresponding path program 1 times [2023-08-04 03:06:35,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:35,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391865177] [2023-08-04 03:06:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:35,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:35,323 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 03:06:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:35,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391865177] [2023-08-04 03:06:35,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391865177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:35,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:06:35,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:06:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218323921] [2023-08-04 03:06:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:06:35,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:06:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:06:35,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-08-04 03:06:35,332 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 03:06:35,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:35,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-08-04 03:06:35,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:37,190 INFO L124 PetriNetUnfolderBase]: 26273/31464 cut-off events. [2023-08-04 03:06:37,191 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2023-08-04 03:06:37,321 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 03:06:37,446 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 03:06:37,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 225 flow [2023-08-04 03:06:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:06:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:06:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-08-04 03:06:37,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256895193065406 [2023-08-04 03:06:37,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-08-04 03:06:37,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-08-04 03:06:37,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:37,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-08-04 03:06:37,468 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 03:06:37,486 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 03:06:37,487 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 03:06:37,487 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 136 flow. Second operand 3 states and 587 transitions. [2023-08-04 03:06:37,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 225 flow [2023-08-04 03:06:37,489 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 03:06:37,490 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 134 flow [2023-08-04 03:06:37,490 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 03:06:37,491 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:06:37,492 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 134 flow [2023-08-04 03:06:37,492 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 03:06:37,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:37,492 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 03:06:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:06:37,492 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 03:06:37,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2054806421, now seen corresponding path program 1 times [2023-08-04 03:06:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69027787] [2023-08-04 03:06:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:37,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:37,529 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 03:06:37,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:37,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69027787] [2023-08-04 03:06:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69027787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:37,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282036670] [2023-08-04 03:06:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:37,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:37,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:37,547 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 03:06:37,548 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 03:06:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:37,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:06:37,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:37,633 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 03:06:37,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:06:37,645 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 03:06:37,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282036670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:06:37,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:06:37,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:06:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678022368] [2023-08-04 03:06:37,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:06:37,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:06:37,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:06:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:06:37,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:06:37,657 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 03:06:37,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:37,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:06:37,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:38,891 INFO L124 PetriNetUnfolderBase]: 20873/24849 cut-off events. [2023-08-04 03:06:38,891 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-08-04 03:06:38,992 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 03:06:39,081 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 43 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 03:06:39,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 253 flow [2023-08-04 03:06:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:06:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:06:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2023-08-04 03:06:39,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574468085106383 [2023-08-04 03:06:39,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2023-08-04 03:06:39,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2023-08-04 03:06:39,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:39,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2023-08-04 03:06:39,084 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 03:06:39,086 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 03:06:39,086 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 03:06:39,086 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 134 flow. Second operand 4 states and 774 transitions. [2023-08-04 03:06:39,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 253 flow [2023-08-04 03:06:39,087 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 03:06:39,088 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 131 flow [2023-08-04 03:06:39,088 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 03:06:39,088 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-04 03:06:39,088 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 131 flow [2023-08-04 03:06:39,089 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 03:06:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:39,089 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 03:06:39,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:06:39,293 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 03:06:39,293 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 03:06:39,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1631704265, now seen corresponding path program 1 times [2023-08-04 03:06:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:39,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7263523] [2023-08-04 03:06:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:39,345 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 03:06:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7263523] [2023-08-04 03:06:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7263523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:06:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337947998] [2023-08-04 03:06:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:06:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:06:39,363 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 03:06:39,365 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 03:06:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:39,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:06:39,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:06:39,464 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 03:06:39,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:06:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337947998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:06:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:06:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28554591] [2023-08-04 03:06:39,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:06:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:06:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:06:39,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 423 [2023-08-04 03:06:39,476 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 03:06:39,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:39,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 423 [2023-08-04 03:06:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:40,428 INFO L124 PetriNetUnfolderBase]: 15041/18045 cut-off events. [2023-08-04 03:06:40,428 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-04 03:06:40,482 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 03:06:40,492 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 03:06:40,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 317 flow [2023-08-04 03:06:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:06:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:06:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2023-08-04 03:06:40,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595744680851064 [2023-08-04 03:06:40,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2023-08-04 03:06:40,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2023-08-04 03:06:40,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:06:40,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2023-08-04 03:06:40,497 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 03:06:40,499 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 03:06:40,499 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 03:06:40,500 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 131 flow. Second operand 5 states and 972 transitions. [2023-08-04 03:06:40,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 317 flow [2023-08-04 03:06:40,513 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 03:06:40,514 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-04 03:06:40,514 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 03:06:40,514 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:06:40,514 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-04 03:06:40,515 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 03:06:40,515 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:06:40,515 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:06:40,515 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:06:40,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:06:40,719 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 03:06:40,719 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:40,720 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:06:40,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,007 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:06:41,007 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:06:41,036 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 03:06:41,037 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:06:41,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,052 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 560 flow [2023-08-04 03:06:41,339 INFO L124 PetriNetUnfolderBase]: 891/4150 cut-off events. [2023-08-04 03:06:41,339 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:06:41,369 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 03:06:41,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:06:45,967 INFO L134 LiptonReduction]: Checked pairs total: 26762 [2023-08-04 03:06:45,968 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-04 03:06:45,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:06:45,970 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;@4a4762e2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:06:45,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:06:45,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:06:45,973 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:06:45,973 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:06:45,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:06:45,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:06:45,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:06:45,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:06:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1296424842, now seen corresponding path program 1 times [2023-08-04 03:06:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:06:45,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875188326] [2023-08-04 03:06:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:06:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:06:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:06:46,007 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 03:06:46,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:06:46,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875188326] [2023-08-04 03:06:46,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875188326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:06:46,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:06:46,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:06:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545669788] [2023-08-04 03:06:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:06:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:06:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:06:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:06:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:06:46,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 03:06:46,016 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 03:06:46,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:06:46,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 03:06:46,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:07,688 INFO L124 PetriNetUnfolderBase]: 282571/337077 cut-off events. [2023-08-04 03:07:07,688 INFO L125 PetriNetUnfolderBase]: For 35136/35136 co-relation queries the response was YES. [2023-08-04 03:07:08,573 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 03:07:09,700 INFO L140 encePairwiseOnDemand]: 418/422 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 03:07:09,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 03:07:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 612 transitions. [2023-08-04 03:07:09,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834123222748815 [2023-08-04 03:07:09,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 612 transitions. [2023-08-04 03:07:09,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 612 transitions. [2023-08-04 03:07:09,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:09,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 612 transitions. [2023-08-04 03:07:09,705 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 03:07:09,706 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 03:07:09,707 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 03:07:09,707 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 612 transitions. [2023-08-04 03:07:09,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 03:07:09,890 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 03:07:09,891 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 03:07:09,891 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 03:07:09,892 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 03:07:09,892 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 03:07:09,892 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 03:07:09,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:09,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:09,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 03:07:09,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:07:09,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash -855984737, now seen corresponding path program 1 times [2023-08-04 03:07:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054309845] [2023-08-04 03:07:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:09,927 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 03:07:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054309845] [2023-08-04 03:07:09,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054309845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048088497] [2023-08-04 03:07:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:09,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:09,929 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 03:07:09,932 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 03:07:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:10,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:07:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:10,019 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 03:07:10,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:07:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048088497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:07:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:07:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679163363] [2023-08-04 03:07:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:07:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:07:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:07:10,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 422 [2023-08-04 03:07:10,030 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 03:07:10,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:10,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 422 [2023-08-04 03:07:10,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand