/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_test-easy10.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:30:36,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:30:36,656 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:30:36,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:30:36,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:30:36,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:30:36,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:30:36,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:30:36,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:30:36,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:30:36,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:30:36,691 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:30:36,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:30:36,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:30:36,693 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:30:36,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:30:36,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:30:36,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:30:36,695 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:30:36,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:30:36,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:30:36,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:30:36,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:30:36,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:30:36,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:30:36,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:30:36,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:30:36,697 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:30:36,697 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:30:36,698 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:30:36,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:30:36,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:30:36,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:30:36,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:30:36,953 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:30:36,953 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:30:36,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy10.wvr_bound2.c [2023-08-04 03:30:37,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:30:38,122 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:30:38,123 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy10.wvr_bound2.c [2023-08-04 03:30:38,130 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8837a6e/9ad86503c0074135953a2b9a7876ee8e/FLAGc39413e84 [2023-08-04 03:30:38,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8837a6e/9ad86503c0074135953a2b9a7876ee8e [2023-08-04 03:30:38,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:30:38,150 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:30:38,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:30:38,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:30:38,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:30:38,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf75bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38, skipping insertion in model container [2023-08-04 03:30:38,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,181 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:30:38,307 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_test-easy10.wvr_bound2.c[4231,4244] [2023-08-04 03:30:38,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:30:38,322 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:30:38,345 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-easy10.wvr_bound2.c[4231,4244] [2023-08-04 03:30:38,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:30:38,354 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:30:38,354 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:30:38,358 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:30:38,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38 WrapperNode [2023-08-04 03:30:38,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:30:38,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:30:38,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:30:38,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:30:38,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,399 INFO L138 Inliner]: procedures = 23, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 256 [2023-08-04 03:30:38,400 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:30:38,400 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:30:38,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:30:38,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:30:38,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,417 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:30:38,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:30:38,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:30:38,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:30:38,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (1/1) ... [2023-08-04 03:30:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:30:38,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:38,454 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 03:30:38,484 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 03:30:38,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:30:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:30:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:30:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:30:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:30:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:30:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:30:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 03:30:38,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:30:38,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:30:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:30:38,493 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 03:30:38,578 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:30:38,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:30:38,858 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:30:38,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:30:38,886 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 03:30:38,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:30:38 BoogieIcfgContainer [2023-08-04 03:30:38,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:30:38,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:30:38,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:30:38,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:30:38,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:30:38" (1/3) ... [2023-08-04 03:30:38,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e89812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:30:38, skipping insertion in model container [2023-08-04 03:30:38,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:30:38" (2/3) ... [2023-08-04 03:30:38,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e89812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:30:38, skipping insertion in model container [2023-08-04 03:30:38,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:30:38" (3/3) ... [2023-08-04 03:30:38,896 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-easy10.wvr_bound2.c [2023-08-04 03:30:38,901 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:30:38,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:30:38,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:30:38,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:30:38,974 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 03:30:39,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 03:30:39,308 INFO L124 PetriNetUnfolderBase]: 239/1471 cut-off events. [2023-08-04 03:30:39,308 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 03:30:39,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 1471 events. 239/1471 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10494 event pairs, 0 based on Foata normal form. 0/1250 useless extension candidates. Maximal degree in co-relation 828. Up to 33 conditions per place. [2023-08-04 03:30:39,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 203 transitions, 474 flow [2023-08-04 03:30:39,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 129 transitions, 278 flow [2023-08-04 03:30:39,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:39,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 129 transitions, 278 flow [2023-08-04 03:30:39,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 129 transitions, 278 flow [2023-08-04 03:30:39,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 129 transitions, 278 flow [2023-08-04 03:30:39,361 INFO L124 PetriNetUnfolderBase]: 15/431 cut-off events. [2023-08-04 03:30:39,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:30:39,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 431 events. 15/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2013 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2023-08-04 03:30:39,369 INFO L119 LiptonReduction]: Number of co-enabled transitions 2752 [2023-08-04 03:30:43,293 INFO L134 LiptonReduction]: Checked pairs total: 13625 [2023-08-04 03:30:43,293 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 03:30:43,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:30:43,306 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;@3f739233, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:30:43,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 03:30:43,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:30:43,309 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 03:30:43,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:30:43,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:43,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:30:43,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:30:43,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash -671966068, now seen corresponding path program 1 times [2023-08-04 03:30:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:43,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635779652] [2023-08-04 03:30:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:30:43,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:30:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:30:43,461 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:30:43,462 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:30:43,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 03:30:43,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 03:30:43,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 03:30:43,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 03:30:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:30:43,466 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:30:43,468 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:30:43,469 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:30:43,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:30:43,515 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 03:30:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 03:30:45,769 INFO L124 PetriNetUnfolderBase]: 5322/20204 cut-off events. [2023-08-04 03:30:45,770 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 03:30:45,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24589 conditions, 20204 events. 5322/20204 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 219273 event pairs, 81 based on Foata normal form. 0/17403 useless extension candidates. Maximal degree in co-relation 12203. Up to 1024 conditions per place. [2023-08-04 03:30:45,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 03:30:45,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 165 transitions, 378 flow [2023-08-04 03:30:45,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:45,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 165 transitions, 378 flow [2023-08-04 03:30:45,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 165 transitions, 378 flow [2023-08-04 03:30:45,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 165 transitions, 378 flow [2023-08-04 03:30:46,091 INFO L124 PetriNetUnfolderBase]: 40/1801 cut-off events. [2023-08-04 03:30:46,092 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 03:30:46,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 1801 events. 40/1801 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 14411 event pairs, 0 based on Foata normal form. 0/1722 useless extension candidates. Maximal degree in co-relation 1433. Up to 81 conditions per place. [2023-08-04 03:30:46,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 7808 [2023-08-04 03:30:49,158 INFO L134 LiptonReduction]: Checked pairs total: 45956 [2023-08-04 03:30:49,158 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 03:30:49,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:30:49,160 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;@3f739233, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:30:49,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 03:30:49,166 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:30:49,166 INFO L124 PetriNetUnfolderBase]: 0/99 cut-off events. [2023-08-04 03:30:49,166 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 03:30:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:49,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:49,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:30:49,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1145200560, now seen corresponding path program 1 times [2023-08-04 03:30:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513124836] [2023-08-04 03:30:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:30:49,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:49,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513124836] [2023-08-04 03:30:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513124836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:30:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:30:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195402583] [2023-08-04 03:30:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:30:49,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:30:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:30:49,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 352 [2023-08-04 03:30:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 198 flow. Second operand has 3 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 03:30:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:49,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 352 [2023-08-04 03:30:49,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:18,538 INFO L124 PetriNetUnfolderBase]: 228488/349323 cut-off events. [2023-08-04 03:31:18,538 INFO L125 PetriNetUnfolderBase]: For 26364/26364 co-relation queries the response was YES. [2023-08-04 03:31:20,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698656 conditions, 349323 events. 228488/349323 cut-off events. For 26364/26364 co-relation queries the response was YES. Maximal size of possible extension queue 11485. Compared 3470617 event pairs, 190410 based on Foata normal form. 0/336990 useless extension candidates. Maximal degree in co-relation 207492. Up to 285606 conditions per place. [2023-08-04 03:31:22,072 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 37 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 03:31:22,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 79 transitions, 284 flow [2023-08-04 03:31:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-08-04 03:31:22,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-04 03:31:22,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-08-04 03:31:22,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-08-04 03:31:22,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:22,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-08-04 03:31:22,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 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 03:31:22,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:31:22,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:31:22,097 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 198 flow. Second operand 3 states and 616 transitions. [2023-08-04 03:31:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 79 transitions, 284 flow [2023-08-04 03:31:22,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 79 transitions, 276 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-04 03:31:22,184 INFO L231 Difference]: Finished difference. Result has 95 places, 76 transitions, 202 flow [2023-08-04 03:31:22,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=95, PETRI_TRANSITIONS=76} [2023-08-04 03:31:22,191 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-08-04 03:31:22,191 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 76 transitions, 202 flow [2023-08-04 03:31:22,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 03:31:22,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:22,195 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:31:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:31:22,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:31:22,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash 641573030, now seen corresponding path program 1 times [2023-08-04 03:31:22,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:22,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932689635] [2023-08-04 03:31:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:22,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:22,330 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 03:31:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932689635] [2023-08-04 03:31:22,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932689635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:22,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962804378] [2023-08-04 03:31:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:22,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:22,333 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 03:31:22,335 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 03:31:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:22,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:31:22,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:22,474 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 03:31:22,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:22,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962804378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:22,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:22,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:31:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383435090] [2023-08-04 03:31:22,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:31:22,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:31:22,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 76 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 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 03:31:22,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:22,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:31:22,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:49,717 INFO L124 PetriNetUnfolderBase]: 228476/349294 cut-off events. [2023-08-04 03:31:49,717 INFO L125 PetriNetUnfolderBase]: For 6605/6605 co-relation queries the response was YES. [2023-08-04 03:31:51,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678854 conditions, 349294 events. 228476/349294 cut-off events. For 6605/6605 co-relation queries the response was YES. Maximal size of possible extension queue 11485. Compared 3458213 event pairs, 161864 based on Foata normal form. 9/336987 useless extension candidates. Maximal degree in co-relation 678815. Up to 285559 conditions per place. [2023-08-04 03:31:53,288 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 40 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 03:31:53,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 304 flow [2023-08-04 03:31:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:31:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:31:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2023-08-04 03:31:53,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 03:31:53,296 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2023-08-04 03:31:53,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2023-08-04 03:31:53,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:53,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2023-08-04 03:31:53,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 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 03:31:53,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:31:53,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:31:53,302 INFO L175 Difference]: Start difference. First operand has 95 places, 76 transitions, 202 flow. Second operand 5 states and 1000 transitions. [2023-08-04 03:31:53,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 304 flow [2023-08-04 03:31:53,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 83 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:31:53,308 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 216 flow [2023-08-04 03:31:53,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2023-08-04 03:31:53,309 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 6 predicate places. [2023-08-04 03:31:53,309 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 216 flow [2023-08-04 03:31:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 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 03:31:53,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:53,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:53,317 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 03:31:53,516 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 03:31:53,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:31:53,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1703105361, now seen corresponding path program 1 times [2023-08-04 03:31:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142898123] [2023-08-04 03:31:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142898123] [2023-08-04 03:31:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142898123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568831161] [2023-08-04 03:31:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:53,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:53,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:53,592 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 03:31:53,615 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 03:31:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:53,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:53,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:31:53,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:53,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568831161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:53,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:53,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:31:53,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180649288] [2023-08-04 03:31:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:53,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:53,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 352 [2023-08-04 03:31:53,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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 03:31:53,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:53,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 352 [2023-08-04 03:31:53,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:32:20,320 INFO L124 PetriNetUnfolderBase]: 215666/327267 cut-off events. [2023-08-04 03:32:20,321 INFO L125 PetriNetUnfolderBase]: For 6156/6156 co-relation queries the response was YES. [2023-08-04 03:32:22,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636340 conditions, 327267 events. 215666/327267 cut-off events. For 6156/6156 co-relation queries the response was YES. Maximal size of possible extension queue 11129. Compared 3175285 event pairs, 215572 based on Foata normal form. 0/315874 useless extension candidates. Maximal degree in co-relation 193095. Up to 268294 conditions per place. [2023-08-04 03:32:23,715 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 42 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-04 03:32:23,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 84 transitions, 322 flow [2023-08-04 03:32:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:32:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:32:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-04 03:32:23,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2023-08-04 03:32:23,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-04 03:32:23,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-04 03:32:23,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:32:23,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-04 03:32:23,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:32:23,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:32:23,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:32:23,720 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 216 flow. Second operand 3 states and 620 transitions. [2023-08-04 03:32:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 84 transitions, 322 flow [2023-08-04 03:32:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 84 transitions, 315 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:32:23,727 INFO L231 Difference]: Finished difference. Result has 99 places, 77 transitions, 224 flow [2023-08-04 03:32:23,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=99, PETRI_TRANSITIONS=77} [2023-08-04 03:32:23,727 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2023-08-04 03:32:23,727 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 77 transitions, 224 flow [2023-08-04 03:32:23,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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 03:32:23,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:32:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:32:23,733 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 03:32:23,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:32:23,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:32:23,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:32:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash 437504931, now seen corresponding path program 1 times [2023-08-04 03:32:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:32:23,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251011206] [2023-08-04 03:32:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:32:23,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:32:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:32:23,993 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 03:32:23,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:32:23,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251011206] [2023-08-04 03:32:23,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251011206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:32:23,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274216120] [2023-08-04 03:32:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:32:23,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:32:23,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:32:23,996 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 03:32:24,048 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 03:32:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:32:24,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:32:24,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:32:24,115 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 03:32:24,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:32:24,131 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 03:32:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274216120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:32:24,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:32:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:32:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603992565] [2023-08-04 03:32:24,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:32:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:32:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:32:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:32:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:32:24,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:32:24,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 77 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 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 03:32:24,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:32:24,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:32:24,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:32:44,181 INFO L124 PetriNetUnfolderBase]: 168346/252054 cut-off events. [2023-08-04 03:32:44,181 INFO L125 PetriNetUnfolderBase]: For 4801/4801 co-relation queries the response was YES. [2023-08-04 03:32:45,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490719 conditions, 252054 events. 168346/252054 cut-off events. For 4801/4801 co-relation queries the response was YES. Maximal size of possible extension queue 8697. Compared 2325717 event pairs, 141968 based on Foata normal form. 3/243626 useless extension candidates. Maximal degree in co-relation 172342. Up to 207892 conditions per place. [2023-08-04 03:32:47,036 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 41 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-04 03:32:47,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 83 transitions, 319 flow [2023-08-04 03:32:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:32:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:32:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-08-04 03:32:47,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2023-08-04 03:32:47,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-08-04 03:32:47,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-08-04 03:32:47,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:32:47,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-08-04 03:32:47,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 03:32:47,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:32:47,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:32:47,045 INFO L175 Difference]: Start difference. First operand has 99 places, 77 transitions, 224 flow. Second operand 4 states and 808 transitions. [2023-08-04 03:32:47,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 83 transitions, 319 flow [2023-08-04 03:32:47,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 83 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:32:47,052 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 219 flow [2023-08-04 03:32:47,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2023-08-04 03:32:47,053 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2023-08-04 03:32:47,054 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 219 flow [2023-08-04 03:32:47,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 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 03:32:47,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:32:47,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:32:47,065 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 03:32:47,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:32:47,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:32:47,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:32:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1730778045, now seen corresponding path program 1 times [2023-08-04 03:32:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:32:47,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322750495] [2023-08-04 03:32:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:32:47,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:32:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:32:47,336 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 03:32:47,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:32:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322750495] [2023-08-04 03:32:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322750495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:32:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025499733] [2023-08-04 03:32:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:32:47,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:32:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:32:47,341 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 03:32:47,343 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 03:32:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:32:47,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:32:47,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:32:47,442 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 03:32:47,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:32:47,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025499733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:32:47,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:32:47,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:32:47,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928033909] [2023-08-04 03:32:47,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:32:47,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:32:47,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:32:47,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:32:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:32:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:32:47,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 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 03:32:47,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:32:47,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:32:47,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:33:07,879 INFO L124 PetriNetUnfolderBase]: 168130/251687 cut-off events. [2023-08-04 03:33:07,879 INFO L125 PetriNetUnfolderBase]: For 4776/4776 co-relation queries the response was YES. [2023-08-04 03:33:09,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489960 conditions, 251687 events. 168130/251687 cut-off events. For 4776/4776 co-relation queries the response was YES. Maximal size of possible extension queue 8697. Compared 2322291 event pairs, 69670 based on Foata normal form. 81/243399 useless extension candidates. Maximal degree in co-relation 172070. Up to 207063 conditions per place. [2023-08-04 03:33:10,830 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 53 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-08-04 03:33:10,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 371 flow [2023-08-04 03:33:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:33:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:33:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1012 transitions. [2023-08-04 03:33:10,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2023-08-04 03:33:10,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1012 transitions. [2023-08-04 03:33:10,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1012 transitions. [2023-08-04 03:33:10,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:33:10,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1012 transitions. [2023-08-04 03:33:10,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.4) internal successors, (1012), 5 states have internal predecessors, (1012), 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 03:33:10,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:33:10,838 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:33:10,838 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 219 flow. Second operand 5 states and 1012 transitions. [2023-08-04 03:33:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 371 flow [2023-08-04 03:33:10,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 364 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:33:10,843 INFO L231 Difference]: Finished difference. Result has 102 places, 76 transitions, 229 flow [2023-08-04 03:33:10,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=102, PETRI_TRANSITIONS=76} [2023-08-04 03:33:10,844 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 10 predicate places. [2023-08-04 03:33:10,844 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 76 transitions, 229 flow [2023-08-04 03:33:10,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.6) internal successors, (968), 5 states have internal predecessors, (968), 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 03:33:10,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:33:10,845 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:33:10,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:33:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:11,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:33:11,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:33:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash 448014730, now seen corresponding path program 1 times [2023-08-04 03:33:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:33:11,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924422757] [2023-08-04 03:33:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:33:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 03:33:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:33:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924422757] [2023-08-04 03:33:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924422757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:33:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508852327] [2023-08-04 03:33:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:11,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:33:11,094 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 03:33:11,095 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 03:33:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:11,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:33:11,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:33:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:33:11,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:33:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508852327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:33:11,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:33:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:33:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676778238] [2023-08-04 03:33:11,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:33:11,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:33:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:33:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:33:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:33:11,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 352 [2023-08-04 03:33:11,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 76 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 03:33:11,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:33:11,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 352 [2023-08-04 03:33:11,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:33:29,487 INFO L124 PetriNetUnfolderBase]: 159220/235535 cut-off events. [2023-08-04 03:33:29,487 INFO L125 PetriNetUnfolderBase]: For 5661/5661 co-relation queries the response was YES. [2023-08-04 03:33:30,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460314 conditions, 235535 events. 159220/235535 cut-off events. For 5661/5661 co-relation queries the response was YES. Maximal size of possible extension queue 8435. Compared 2142926 event pairs, 113293 based on Foata normal form. 0/228102 useless extension candidates. Maximal degree in co-relation 161589. Up to 194125 conditions per place. [2023-08-04 03:33:32,195 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 47 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-04 03:33:32,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 88 transitions, 353 flow [2023-08-04 03:33:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:33:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:33:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 03:33:32,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2023-08-04 03:33:32,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 03:33:32,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 03:33:32,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:33:32,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 03:33:32,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 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 03:33:32,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:33:32,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:33:32,202 INFO L175 Difference]: Start difference. First operand has 102 places, 76 transitions, 229 flow. Second operand 3 states and 624 transitions. [2023-08-04 03:33:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 88 transitions, 353 flow [2023-08-04 03:33:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 88 transitions, 346 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:33:32,205 INFO L231 Difference]: Finished difference. Result has 103 places, 77 transitions, 237 flow [2023-08-04 03:33:32,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=103, PETRI_TRANSITIONS=77} [2023-08-04 03:33:32,206 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2023-08-04 03:33:32,206 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 77 transitions, 237 flow [2023-08-04 03:33:32,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 03:33:32,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:33:32,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:33:32,225 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 03:33:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:32,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:33:32,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:33:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1031909974, now seen corresponding path program 1 times [2023-08-04 03:33:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:33:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059511723] [2023-08-04 03:33:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:33:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:32,461 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 03:33:32,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:33:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059511723] [2023-08-04 03:33:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059511723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:33:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855382497] [2023-08-04 03:33:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:32,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:33:32,463 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 03:33:32,465 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 03:33:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:32,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:33:32,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:33:32,548 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 03:33:32,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:33:32,562 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 03:33:32,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855382497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:33:32,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:33:32,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:33:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002937335] [2023-08-04 03:33:32,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:33:32,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:33:32,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:33:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:33:32,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:33:32,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:33:32,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 77 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 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 03:33:32,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:33:32,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:33:32,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:33:47,208 INFO L124 PetriNetUnfolderBase]: 124120/182552 cut-off events. [2023-08-04 03:33:47,208 INFO L125 PetriNetUnfolderBase]: For 5202/5202 co-relation queries the response was YES. [2023-08-04 03:33:48,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358264 conditions, 182552 events. 124120/182552 cut-off events. For 5202/5202 co-relation queries the response was YES. Maximal size of possible extension queue 6715. Compared 1582061 event pairs, 105430 based on Foata normal form. 27/177651 useless extension candidates. Maximal degree in co-relation 125544. Up to 151279 conditions per place. [2023-08-04 03:33:49,329 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 50 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-04 03:33:49,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 91 transitions, 366 flow [2023-08-04 03:33:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:33:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:33:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 816 transitions. [2023-08-04 03:33:49,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2023-08-04 03:33:49,331 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 816 transitions. [2023-08-04 03:33:49,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 816 transitions. [2023-08-04 03:33:49,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:33:49,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 816 transitions. [2023-08-04 03:33:49,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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 03:33:49,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:33:49,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:33:49,335 INFO L175 Difference]: Start difference. First operand has 103 places, 77 transitions, 237 flow. Second operand 4 states and 816 transitions. [2023-08-04 03:33:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 91 transitions, 366 flow [2023-08-04 03:33:49,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 91 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:33:49,338 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 232 flow [2023-08-04 03:33:49,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2023-08-04 03:33:49,339 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2023-08-04 03:33:49,339 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 232 flow [2023-08-04 03:33:49,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 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 03:33:49,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:33:49,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:33:49,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:33:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:49,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:33:49,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:33:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1659509456, now seen corresponding path program 1 times [2023-08-04 03:33:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:33:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672421343] [2023-08-04 03:33:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:33:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:49,601 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 03:33:49,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:33:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672421343] [2023-08-04 03:33:49,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672421343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:33:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136456881] [2023-08-04 03:33:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:33:49,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:33:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:33:49,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:33:49,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:33:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:33:49,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:33:49,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:33:49,747 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 03:33:49,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:33:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136456881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:33:49,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:33:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:33:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305288650] [2023-08-04 03:33:49,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:33:49,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:33:49,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:33:49,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:33:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:33:49,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:33:49,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 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 03:33:49,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:33:49,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:33:49,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:05,177 INFO L124 PetriNetUnfolderBase]: 121204/178448 cut-off events. [2023-08-04 03:34:05,178 INFO L125 PetriNetUnfolderBase]: For 5463/5463 co-relation queries the response was YES. [2023-08-04 03:34:06,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349660 conditions, 178448 events. 121204/178448 cut-off events. For 5463/5463 co-relation queries the response was YES. Maximal size of possible extension queue 6586. Compared 1545149 event pairs, 32374 based on Foata normal form. 729/174642 useless extension candidates. Maximal degree in co-relation 122514. Up to 140535 conditions per place. [2023-08-04 03:34:07,061 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 66 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-04 03:34:07,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 434 flow [2023-08-04 03:34:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:34:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:34:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1024 transitions. [2023-08-04 03:34:07,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2023-08-04 03:34:07,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1024 transitions. [2023-08-04 03:34:07,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1024 transitions. [2023-08-04 03:34:07,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:07,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1024 transitions. [2023-08-04 03:34:07,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.8) internal successors, (1024), 5 states have internal predecessors, (1024), 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 03:34:07,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:34:07,069 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 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 03:34:07,069 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 232 flow. Second operand 5 states and 1024 transitions. [2023-08-04 03:34:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 434 flow [2023-08-04 03:34:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 107 transitions, 427 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:34:07,086 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 242 flow [2023-08-04 03:34:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2023-08-04 03:34:07,086 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 14 predicate places. [2023-08-04 03:34:07,086 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 242 flow [2023-08-04 03:34:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.6) internal successors, (973), 5 states have internal predecessors, (973), 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 03:34:07,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:07,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:07,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 03:34:07,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:34:07,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:34:07,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:07,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1635364728, now seen corresponding path program 1 times [2023-08-04 03:34:07,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:07,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300612673] [2023-08-04 03:34:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:07,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:34:07,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300612673] [2023-08-04 03:34:07,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300612673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:34:07,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350851533] [2023-08-04 03:34:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:07,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:34:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:34:07,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:34:07,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:34:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:07,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:34:07,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:34:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:34:07,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:34:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:34:07,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350851533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:34:07,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:34:07,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:34:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426937836] [2023-08-04 03:34:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:34:07,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:34:07,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:34:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:34:07,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 352 [2023-08-04 03:34:07,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 195.4) internal successors, (977), 5 states have internal predecessors, (977), 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 03:34:07,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:07,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 352 [2023-08-04 03:34:07,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:18,825 INFO L124 PetriNetUnfolderBase]: 96094/140054 cut-off events. [2023-08-04 03:34:18,825 INFO L125 PetriNetUnfolderBase]: For 10602/10602 co-relation queries the response was YES. [2023-08-04 03:34:19,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277697 conditions, 140054 events. 96094/140054 cut-off events. For 10602/10602 co-relation queries the response was YES. Maximal size of possible extension queue 5330. Compared 1173782 event pairs, 59995 based on Foata normal form. 243/136977 useless extension candidates. Maximal degree in co-relation 97176. Up to 110209 conditions per place. [2023-08-04 03:34:20,431 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 58 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-04 03:34:20,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 98 transitions, 404 flow [2023-08-04 03:34:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:34:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:34:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 824 transitions. [2023-08-04 03:34:20,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2023-08-04 03:34:20,434 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 824 transitions. [2023-08-04 03:34:20,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 824 transitions. [2023-08-04 03:34:20,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:20,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 824 transitions. [2023-08-04 03:34:20,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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 03:34:20,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:34:20,437 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:34:20,437 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 242 flow. Second operand 4 states and 824 transitions. [2023-08-04 03:34:20,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 98 transitions, 404 flow [2023-08-04 03:34:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 03:34:20,445 INFO L231 Difference]: Finished difference. Result has 107 places, 75 transitions, 235 flow [2023-08-04 03:34:20,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=107, PETRI_TRANSITIONS=75} [2023-08-04 03:34:20,446 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2023-08-04 03:34:20,446 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 75 transitions, 235 flow [2023-08-04 03:34:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.4) internal successors, (977), 5 states have internal predecessors, (977), 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 03:34:20,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:20,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:20,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 03:34:20,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 03:34:20,651 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 03:34:20,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash -664627475, now seen corresponding path program 1 times [2023-08-04 03:34:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:20,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809984255] [2023-08-04 03:34:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:20,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:34:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809984255] [2023-08-04 03:34:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809984255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:20,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:20,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 03:34:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039891303] [2023-08-04 03:34:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:34:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:20,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:34:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:34:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 352 [2023-08-04 03:34:20,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 75 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 03:34:20,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:20,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 352 [2023-08-04 03:34:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:34:27,601 INFO L124 PetriNetUnfolderBase]: 61102/89375 cut-off events. [2023-08-04 03:34:27,602 INFO L125 PetriNetUnfolderBase]: For 12033/12033 co-relation queries the response was YES. [2023-08-04 03:34:28,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179147 conditions, 89375 events. 61102/89375 cut-off events. For 12033/12033 co-relation queries the response was YES. Maximal size of possible extension queue 3381. Compared 704395 event pairs, 14446 based on Foata normal form. 6561/94965 useless extension candidates. Maximal degree in co-relation 88977. Up to 49572 conditions per place. [2023-08-04 03:34:28,127 INFO L140 encePairwiseOnDemand]: 350/352 looper letters, 0 selfloop transitions, 0 changer transitions 100/100 dead transitions. [2023-08-04 03:34:28,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 411 flow [2023-08-04 03:34:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:34:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:34:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 830 transitions. [2023-08-04 03:34:28,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894886363636364 [2023-08-04 03:34:28,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 830 transitions. [2023-08-04 03:34:28,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 830 transitions. [2023-08-04 03:34:28,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:34:28,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 830 transitions. [2023-08-04 03:34:28,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 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 03:34:28,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:34:28,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 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 03:34:28,132 INFO L175 Difference]: Start difference. First operand has 107 places, 75 transitions, 235 flow. Second operand 4 states and 830 transitions. [2023-08-04 03:34:28,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 411 flow [2023-08-04 03:34:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 100 transitions, 404 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:34:28,494 INFO L231 Difference]: Finished difference. Result has 105 places, 0 transitions, 0 flow [2023-08-04 03:34:28,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=105, PETRI_TRANSITIONS=0} [2023-08-04 03:34:28,494 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2023-08-04 03:34:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 0 transitions, 0 flow [2023-08-04 03:34:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 03:34:28,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 03:34:28,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 03:34:28,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 03:34:28,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 03:34:28,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 03:34:28,495 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:28,496 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 03:34:28,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 03:34:30,131 INFO L124 PetriNetUnfolderBase]: 5322/20204 cut-off events. [2023-08-04 03:34:30,131 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 03:34:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24589 conditions, 20204 events. 5322/20204 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 219273 event pairs, 81 based on Foata normal form. 0/17403 useless extension candidates. Maximal degree in co-relation 12203. Up to 1024 conditions per place. [2023-08-04 03:34:30,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 255 transitions, 654 flow [2023-08-04 03:34:30,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 239 transitions, 606 flow [2023-08-04 03:34:30,287 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:34:30,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 239 transitions, 606 flow [2023-08-04 03:34:30,288 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 239 transitions, 606 flow [2023-08-04 03:34:30,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 239 transitions, 606 flow [2023-08-04 03:34:31,488 INFO L124 PetriNetUnfolderBase]: 5322/17092 cut-off events. [2023-08-04 03:34:31,488 INFO L125 PetriNetUnfolderBase]: For 4136/4136 co-relation queries the response was YES. [2023-08-04 03:34:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21397 conditions, 17092 events. 5322/17092 cut-off events. For 4136/4136 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 170517 event pairs, 81 based on Foata normal form. 0/14547 useless extension candidates. Maximal degree in co-relation 10628. Up to 1024 conditions per place. [2023-08-04 03:34:31,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 16960 [2023-08-04 03:34:35,000 INFO L134 LiptonReduction]: Checked pairs total: 139327 [2023-08-04 03:34:35,000 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-04 03:34:35,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:34:35,001 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;@3f739233, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:34:35,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:34:35,004 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:34:35,004 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2023-08-04 03:34:35,004 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 03:34:35,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:34:35,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:34:35,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:34:35,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:34:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -711388, now seen corresponding path program 1 times [2023-08-04 03:34:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:34:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206216608] [2023-08-04 03:34:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:34:35,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:34:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:34:35,022 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 03:34:35,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:34:35,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206216608] [2023-08-04 03:34:35,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206216608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:34:35,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:34:35,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:34:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316500718] [2023-08-04 03:34:35,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:34:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:34:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:34:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:34:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:34:35,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 387 [2023-08-04 03:34:35,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 03:34:35,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:34:35,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 387 [2023-08-04 03:34:35,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand