/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-commit-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:50:29,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:50:29,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:50:29,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:50:29,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:50:29,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:50:29,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:50:29,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:50:29,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:50:29,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:50:29,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:50:29,967 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:50:29,968 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:50:29,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:50:29,969 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:50:29,969 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:50:29,969 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:50:29,969 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:50:29,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:50:29,972 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:50:29,972 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:50:29,972 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:50:29,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:50:29,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:50:29,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:50:29,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:50:29,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:50:29,974 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:50:29,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:50:30,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:50:30,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:50:30,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:50:30,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:50:30,213 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:50:30,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-commit-1.wvr_bound2.c [2023-08-04 02:50:31,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:50:31,526 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:50:31,526 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-commit-1.wvr_bound2.c [2023-08-04 02:50:31,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f56fe30/d725cb54faf247f4b66ba76531421e7b/FLAG50c36a271 [2023-08-04 02:50:31,549 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98f56fe30/d725cb54faf247f4b66ba76531421e7b [2023-08-04 02:50:31,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:50:31,557 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:50:31,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:50:31,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:50:31,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:50:31,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ce6a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31, skipping insertion in model container [2023-08-04 02:50:31,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,587 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:50:31,738 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-commit-1.wvr_bound2.c[4847,4860] [2023-08-04 02:50:31,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:50:31,752 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:50:31,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-commit-1.wvr_bound2.c[4847,4860] [2023-08-04 02:50:31,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:50:31,793 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:50:31,794 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:50:31,799 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:50:31,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31 WrapperNode [2023-08-04 02:50:31,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:50:31,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:50:31,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:50:31,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:50:31,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,858 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 395 [2023-08-04 02:50:31,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:50:31,860 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:50:31,860 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:50:31,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:50:31,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,896 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:50:31,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:50:31,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:50:31,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:50:31,908 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (1/1) ... [2023-08-04 02:50:31,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:50:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:50:31,931 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 02:50:31,940 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 02:50:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:50:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:50:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:50:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:50:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:50:31,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:50:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:50:31,961 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:50:31,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:50:31,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:50:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:50:31,964 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 02:50:32,039 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:50:32,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:50:32,427 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:50:32,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:50:32,600 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 02:50:32,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:50:32 BoogieIcfgContainer [2023-08-04 02:50:32,603 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:50:32,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:50:32,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:50:32,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:50:32,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:50:31" (1/3) ... [2023-08-04 02:50:32,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29af7e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:50:32, skipping insertion in model container [2023-08-04 02:50:32,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:50:31" (2/3) ... [2023-08-04 02:50:32,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29af7e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:50:32, skipping insertion in model container [2023-08-04 02:50:32,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:50:32" (3/3) ... [2023-08-04 02:50:32,614 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-commit-1.wvr_bound2.c [2023-08-04 02:50:32,621 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:50:32,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:50:32,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:50:32,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:50:32,708 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:50:32,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:32,940 INFO L124 PetriNetUnfolderBase]: 108/764 cut-off events. [2023-08-04 02:50:32,941 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:50:32,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 764 events. 108/764 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3260 event pairs, 0 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 477. Up to 16 conditions per place. [2023-08-04 02:50:32,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:32,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:32,964 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:50:32,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:32,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:32,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 296 transitions, 634 flow [2023-08-04 02:50:33,100 INFO L124 PetriNetUnfolderBase]: 108/764 cut-off events. [2023-08-04 02:50:33,100 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:50:33,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 764 events. 108/764 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3260 event pairs, 0 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 477. Up to 16 conditions per place. [2023-08-04 02:50:33,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 5664 [2023-08-04 02:50:40,778 INFO L134 LiptonReduction]: Checked pairs total: 13272 [2023-08-04 02:50:40,780 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-04 02:50:40,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:50:40,805 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;@325a028, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:50:40,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:50:40,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:50:40,811 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 02:50:40,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:50:40,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:50:40,812 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:50:40,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:50:40,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:50:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2086381175, now seen corresponding path program 1 times [2023-08-04 02:50:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:50:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692182766] [2023-08-04 02:50:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:50:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:50:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:50:40,975 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:50:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:50:41,062 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:50:41,063 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:50:41,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:50:41,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:50:41,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:50:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:50:41,072 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:50:41,075 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:50:41,076 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:50:41,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:50:41,130 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:50:41,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:41,620 INFO L124 PetriNetUnfolderBase]: 898/4255 cut-off events. [2023-08-04 02:50:41,620 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:50:41,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 4255 events. 898/4255 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32754 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 02:50:41,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:41,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:41,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:50:41,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:41,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:41,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:50:42,172 INFO L124 PetriNetUnfolderBase]: 898/4255 cut-off events. [2023-08-04 02:50:42,172 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:50:42,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 4255 events. 898/4255 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32754 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 02:50:42,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 14728 [2023-08-04 02:50:50,686 INFO L134 LiptonReduction]: Checked pairs total: 40515 [2023-08-04 02:50:50,687 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-08-04 02:50:50,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:50:50,689 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;@325a028, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:50:50,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:50:50,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:50:50,696 INFO L124 PetriNetUnfolderBase]: 18/126 cut-off events. [2023-08-04 02:50:50,696 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:50:50,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:50:50,696 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:50:50,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:50:50,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:50:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2062589618, now seen corresponding path program 1 times [2023-08-04 02:50:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:50:50,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532445243] [2023-08-04 02:50:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:50:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:50:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:50:50,901 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 02:50:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:50:50,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532445243] [2023-08-04 02:50:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532445243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:50:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860244723] [2023-08-04 02:50:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:50:50,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:50:50,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:50:50,905 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 02:50:50,911 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 02:50:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:50:51,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:50:51,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:50:51,064 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 02:50:51,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:50:51,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860244723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:50:51,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:50:51,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:50:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978051137] [2023-08-04 02:50:51,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:50:51,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:50:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:50:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:50:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:50:51,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 663 [2023-08-04 02:50:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 81 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 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 02:50:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:50:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 663 [2023-08-04 02:50:51,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:51:45,764 INFO L124 PetriNetUnfolderBase]: 504479/630379 cut-off events. [2023-08-04 02:51:45,764 INFO L125 PetriNetUnfolderBase]: For 67999/67999 co-relation queries the response was YES. [2023-08-04 02:51:47,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280656 conditions, 630379 events. 504479/630379 cut-off events. For 67999/67999 co-relation queries the response was YES. Maximal size of possible extension queue 10279. Compared 3629313 event pairs, 200127 based on Foata normal form. 0/461431 useless extension candidates. Maximal degree in co-relation 306646. Up to 607037 conditions per place. [2023-08-04 02:51:48,044 INFO L140 encePairwiseOnDemand]: 658/663 looper letters, 57 selfloop transitions, 5 changer transitions 31/98 dead transitions. [2023-08-04 02:51:48,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 462 flow [2023-08-04 02:51:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:51:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:51:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1452 transitions. [2023-08-04 02:51:48,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43800904977375565 [2023-08-04 02:51:48,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1452 transitions. [2023-08-04 02:51:48,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1452 transitions. [2023-08-04 02:51:48,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:51:48,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1452 transitions. [2023-08-04 02:51:48,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.4) internal successors, (1452), 5 states have internal predecessors, (1452), 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 02:51:48,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:51:48,087 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:51:48,088 INFO L175 Difference]: Start difference. First operand has 67 places, 81 transitions, 252 flow. Second operand 5 states and 1452 transitions. [2023-08-04 02:51:48,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 462 flow [2023-08-04 02:51:48,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:51:48,154 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 149 flow [2023-08-04 02:51:48,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-08-04 02:51:48,158 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-04 02:51:48,159 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 149 flow [2023-08-04 02:51:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 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 02:51:48,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:51:48,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:51:48,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:51:48,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:51:48,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:51:48,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:51:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -841026900, now seen corresponding path program 1 times [2023-08-04 02:51:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:51:48,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636224589] [2023-08-04 02:51:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:51:48,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:51:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:51:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:51:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:51:48,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636224589] [2023-08-04 02:51:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636224589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:51:48,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:51:48,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:51:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237134190] [2023-08-04 02:51:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:51:48,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:51:48,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:51:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:51:48,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:51:48,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 663 [2023-08-04 02:51:48,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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 02:51:48,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:51:48,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 663 [2023-08-04 02:51:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:51:56,365 INFO L124 PetriNetUnfolderBase]: 76394/94035 cut-off events. [2023-08-04 02:51:56,365 INFO L125 PetriNetUnfolderBase]: For 4525/4525 co-relation queries the response was YES. [2023-08-04 02:51:56,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192607 conditions, 94035 events. 76394/94035 cut-off events. For 4525/4525 co-relation queries the response was YES. Maximal size of possible extension queue 1805. Compared 426792 event pairs, 40900 based on Foata normal form. 1/70907 useless extension candidates. Maximal degree in co-relation 55438. Up to 92417 conditions per place. [2023-08-04 02:51:56,822 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 49 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 02:51:56,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 260 flow [2023-08-04 02:51:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:51:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:51:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 870 transitions. [2023-08-04 02:51:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374057315233786 [2023-08-04 02:51:56,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 870 transitions. [2023-08-04 02:51:56,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 870 transitions. [2023-08-04 02:51:56,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:51:56,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 870 transitions. [2023-08-04 02:51:56,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.0) internal successors, (870), 3 states have internal predecessors, (870), 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 02:51:56,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 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 02:51:56,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 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 02:51:56,830 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 149 flow. Second operand 3 states and 870 transitions. [2023-08-04 02:51:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 260 flow [2023-08-04 02:51:56,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 255 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:51:56,835 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 143 flow [2023-08-04 02:51:56,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-04 02:51:56,836 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -11 predicate places. [2023-08-04 02:51:56,836 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 143 flow [2023-08-04 02:51:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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 02:51:56,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:51:56,837 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:51:56,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:51:56,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:51:56,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:51:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash -39263229, now seen corresponding path program 1 times [2023-08-04 02:51:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:51:56,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281200910] [2023-08-04 02:51:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:51:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:51:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:51:56,909 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 02:51:56,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:51:56,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281200910] [2023-08-04 02:51:56,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281200910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:51:56,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074612972] [2023-08-04 02:51:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:51:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:51:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:51:56,929 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 02:51:56,931 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 02:51:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:51:57,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:51:57,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:51:57,058 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 02:51:57,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:51:57,074 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 02:51:57,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074612972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:51:57,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:51:57,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:51:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56256670] [2023-08-04 02:51:57,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:51:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:51:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:51:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:51:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:51:57,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 663 [2023-08-04 02:51:57,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 275.2) internal successors, (1376), 5 states have internal predecessors, (1376), 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 02:51:57,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:51:57,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 663 [2023-08-04 02:51:57,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:03,402 INFO L124 PetriNetUnfolderBase]: 65894/80620 cut-off events. [2023-08-04 02:52:03,402 INFO L125 PetriNetUnfolderBase]: For 3140/3140 co-relation queries the response was YES. [2023-08-04 02:52:03,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164423 conditions, 80620 events. 65894/80620 cut-off events. For 3140/3140 co-relation queries the response was YES. Maximal size of possible extension queue 1774. Compared 352990 event pairs, 25200 based on Foata normal form. 5/60903 useless extension candidates. Maximal degree in co-relation 47714. Up to 79182 conditions per place. [2023-08-04 02:52:03,832 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 57 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-04 02:52:03,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 292 flow [2023-08-04 02:52:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:52:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:52:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1149 transitions. [2023-08-04 02:52:03,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332579185520362 [2023-08-04 02:52:03,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1149 transitions. [2023-08-04 02:52:03,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1149 transitions. [2023-08-04 02:52:03,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:03,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1149 transitions. [2023-08-04 02:52:03,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 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 02:52:03,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 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 02:52:03,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 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 02:52:03,841 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 143 flow. Second operand 4 states and 1149 transitions. [2023-08-04 02:52:03,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 292 flow [2023-08-04 02:52:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:52:03,843 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 140 flow [2023-08-04 02:52:03,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-04 02:52:03,844 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-04 02:52:03,844 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 140 flow [2023-08-04 02:52:03,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.2) internal successors, (1376), 5 states have internal predecessors, (1376), 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 02:52:03,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:03,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:03,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 02:52:04,049 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 02:52:04,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:52:04,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1270487929, now seen corresponding path program 1 times [2023-08-04 02:52:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:04,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678397028] [2023-08-04 02:52:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:04,143 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 02:52:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678397028] [2023-08-04 02:52:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678397028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842838601] [2023-08-04 02:52:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:04,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:04,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:04,145 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 02:52:04,148 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 02:52:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:04,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:52:04,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:04,271 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 02:52:04,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:52:04,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842838601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:04,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:52:04,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:52:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190626750] [2023-08-04 02:52:04,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:04,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:04,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:52:04,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 663 [2023-08-04 02:52:04,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 275.2) internal successors, (1376), 5 states have internal predecessors, (1376), 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 02:52:04,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:04,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 663 [2023-08-04 02:52:04,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:10,503 INFO L124 PetriNetUnfolderBase]: 64994/80520 cut-off events. [2023-08-04 02:52:10,503 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2023-08-04 02:52:10,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163598 conditions, 80520 events. 64994/80520 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 371448 event pairs, 11118 based on Foata normal form. 0/61313 useless extension candidates. Maximal degree in co-relation 45539. Up to 76000 conditions per place. [2023-08-04 02:52:10,937 INFO L140 encePairwiseOnDemand]: 659/663 looper letters, 82 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-08-04 02:52:10,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 396 flow [2023-08-04 02:52:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:52:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:52:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1447 transitions. [2023-08-04 02:52:10,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436500754147813 [2023-08-04 02:52:10,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1447 transitions. [2023-08-04 02:52:10,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1447 transitions. [2023-08-04 02:52:10,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:10,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1447 transitions. [2023-08-04 02:52:10,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 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 02:52:10,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:52:10,948 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:52:10,948 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 140 flow. Second operand 5 states and 1447 transitions. [2023-08-04 02:52:10,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 396 flow [2023-08-04 02:52:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 389 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:52:10,951 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 152 flow [2023-08-04 02:52:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-04 02:52:10,952 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-04 02:52:10,952 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 152 flow [2023-08-04 02:52:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 275.2) internal successors, (1376), 5 states have internal predecessors, (1376), 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 02:52:10,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:10,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:10,977 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 02:52:11,157 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 02:52:11,158 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:52:11,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1221858441, now seen corresponding path program 1 times [2023-08-04 02:52:11,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:11,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309379802] [2023-08-04 02:52:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:11,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:52:11,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:11,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309379802] [2023-08-04 02:52:11,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309379802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:11,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:52:11,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:52:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334639582] [2023-08-04 02:52:11,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:11,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:52:11,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:52:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:52:11,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 663 [2023-08-04 02:52:11,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 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 02:52:11,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:11,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 663 [2023-08-04 02:52:11,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:17,158 INFO L124 PetriNetUnfolderBase]: 61719/76120 cut-off events. [2023-08-04 02:52:17,158 INFO L125 PetriNetUnfolderBase]: For 3208/3208 co-relation queries the response was YES. [2023-08-04 02:52:17,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155317 conditions, 76120 events. 61719/76120 cut-off events. For 3208/3208 co-relation queries the response was YES. Maximal size of possible extension queue 1794. Compared 341846 event pairs, 35318 based on Foata normal form. 25/57942 useless extension candidates. Maximal degree in co-relation 44158. Up to 73515 conditions per place. [2023-08-04 02:52:17,565 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 02:52:17,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 297 flow [2023-08-04 02:52:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:52:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:52:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 878 transitions. [2023-08-04 02:52:17,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44142785319255906 [2023-08-04 02:52:17,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 878 transitions. [2023-08-04 02:52:17,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 878 transitions. [2023-08-04 02:52:17,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:17,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 878 transitions. [2023-08-04 02:52:17,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 02:52:17,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 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 02:52:17,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 663.0) internal successors, (2652), 4 states have internal predecessors, (2652), 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 02:52:17,572 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 152 flow. Second operand 3 states and 878 transitions. [2023-08-04 02:52:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 297 flow [2023-08-04 02:52:17,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:52:17,575 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 150 flow [2023-08-04 02:52:17,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-04 02:52:17,575 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-04 02:52:17,575 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 150 flow [2023-08-04 02:52:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 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 02:52:17,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:17,576 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:52:17,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:52:17,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1688093386, now seen corresponding path program 1 times [2023-08-04 02:52:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:17,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127620509] [2023-08-04 02:52:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:17,642 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 02:52:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127620509] [2023-08-04 02:52:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127620509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563512305] [2023-08-04 02:52:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:17,670 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 02:52:17,701 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 02:52:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:17,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:52:17,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:17,809 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 02:52:17,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:52:17,826 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 02:52:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563512305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:52:17,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:52:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:52:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638644743] [2023-08-04 02:52:17,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:52:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:52:17,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 663 [2023-08-04 02:52:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 276.2) internal successors, (1381), 5 states have internal predecessors, (1381), 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 02:52:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 663 [2023-08-04 02:52:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:22,671 INFO L124 PetriNetUnfolderBase]: 49044/60070 cut-off events. [2023-08-04 02:52:22,672 INFO L125 PetriNetUnfolderBase]: For 2668/2668 co-relation queries the response was YES. [2023-08-04 02:52:22,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122717 conditions, 60070 events. 49044/60070 cut-off events. For 2668/2668 co-relation queries the response was YES. Maximal size of possible extension queue 1738. Compared 255839 event pairs, 21758 based on Foata normal form. 75/45607 useless extension candidates. Maximal degree in co-relation 36308. Up to 56415 conditions per place. [2023-08-04 02:52:23,020 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 72 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-04 02:52:23,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 357 flow [2023-08-04 02:52:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:52:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:52:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1163 transitions. [2023-08-04 02:52:23,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385369532428356 [2023-08-04 02:52:23,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1163 transitions. [2023-08-04 02:52:23,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1163 transitions. [2023-08-04 02:52:23,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:23,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1163 transitions. [2023-08-04 02:52:23,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 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 02:52:23,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 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 02:52:23,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 663.0) internal successors, (3315), 5 states have internal predecessors, (3315), 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 02:52:23,050 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 150 flow. Second operand 4 states and 1163 transitions. [2023-08-04 02:52:23,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 357 flow [2023-08-04 02:52:23,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 353 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:52:23,053 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 147 flow [2023-08-04 02:52:23,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-04 02:52:23,053 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2023-08-04 02:52:23,054 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 147 flow [2023-08-04 02:52:23,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 276.2) internal successors, (1381), 5 states have internal predecessors, (1381), 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 02:52:23,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:23,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:23,071 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 02:52:23,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:23,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:52:23,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -116182486, now seen corresponding path program 1 times [2023-08-04 02:52:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:23,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229696075] [2023-08-04 02:52:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:23,329 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 02:52:23,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229696075] [2023-08-04 02:52:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229696075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:52:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105059184] [2023-08-04 02:52:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:23,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:52:23,332 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 02:52:23,334 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 02:52:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:23,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:52:23,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:52:23,471 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 02:52:23,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:52:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105059184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:23,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:52:23,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:52:23,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942826880] [2023-08-04 02:52:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:52:23,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:52:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:52:23,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 663 [2023-08-04 02:52:23,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 276.2) internal successors, (1381), 5 states have internal predecessors, (1381), 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 02:52:23,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:23,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 663 [2023-08-04 02:52:23,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:52:28,020 INFO L124 PetriNetUnfolderBase]: 36894/45220 cut-off events. [2023-08-04 02:52:28,021 INFO L125 PetriNetUnfolderBase]: For 2653/2653 co-relation queries the response was YES. [2023-08-04 02:52:28,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93242 conditions, 45220 events. 36894/45220 cut-off events. For 2653/2653 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 183914 event pairs, 1778 based on Foata normal form. 2025/36217 useless extension candidates. Maximal degree in co-relation 36533. Up to 20925 conditions per place. [2023-08-04 02:52:28,102 INFO L140 encePairwiseOnDemand]: 660/663 looper letters, 0 selfloop transitions, 0 changer transitions 107/107 dead transitions. [2023-08-04 02:52:28,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 107 transitions, 469 flow [2023-08-04 02:52:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:52:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:52:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1463 transitions. [2023-08-04 02:52:28,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44132730015082955 [2023-08-04 02:52:28,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1463 transitions. [2023-08-04 02:52:28,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1463 transitions. [2023-08-04 02:52:28,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:52:28,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1463 transitions. [2023-08-04 02:52:28,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 292.6) internal successors, (1463), 5 states have internal predecessors, (1463), 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 02:52:28,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:52:28,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 663.0) internal successors, (3978), 6 states have internal predecessors, (3978), 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 02:52:28,111 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 147 flow. Second operand 5 states and 1463 transitions. [2023-08-04 02:52:28,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 107 transitions, 469 flow [2023-08-04 02:52:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 107 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:52:28,188 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-04 02:52:28,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=663, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-04 02:52:28,189 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-04 02:52:28,189 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-04 02:52:28,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 276.2) internal successors, (1381), 5 states have internal predecessors, (1381), 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 02:52:28,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:52:28,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:52:28,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:52:28,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:52:28,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:52:28,394 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:28,395 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:52:28,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:28,843 INFO L124 PetriNetUnfolderBase]: 898/4255 cut-off events. [2023-08-04 02:52:28,843 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:52:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 4255 events. 898/4255 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32754 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 02:52:28,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:28,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:28,897 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:52:28,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:28,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:28,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 340 transitions, 770 flow [2023-08-04 02:52:29,236 INFO L124 PetriNetUnfolderBase]: 898/4255 cut-off events. [2023-08-04 02:52:29,236 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:52:29,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 4255 events. 898/4255 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 32754 event pairs, 11 based on Foata normal form. 0/3601 useless extension candidates. Maximal degree in co-relation 2572. Up to 192 conditions per place. [2023-08-04 02:52:29,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 14728 [2023-08-04 02:52:35,451 INFO L134 LiptonReduction]: Checked pairs total: 44695 [2023-08-04 02:52:35,452 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-04 02:52:35,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:52:35,453 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;@325a028, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:52:35,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:52:35,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:52:35,465 INFO L124 PetriNetUnfolderBase]: 6/39 cut-off events. [2023-08-04 02:52:35,465 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:52:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:52:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:52:35,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:52:35,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:52:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1910534502, now seen corresponding path program 1 times [2023-08-04 02:52:35,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:52:35,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991249101] [2023-08-04 02:52:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:52:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:52:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:52:35,504 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 02:52:35,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:52:35,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991249101] [2023-08-04 02:52:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991249101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:52:35,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:52:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:52:35,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80944034] [2023-08-04 02:52:35,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:52:35,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:52:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:52:35,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:52:35,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:52:35,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 659 [2023-08-04 02:52:35,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 81 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 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 02:52:35,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:52:35,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 659 [2023-08-04 02:52:35,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:53:26,688 INFO L124 PetriNetUnfolderBase]: 502792/627410 cut-off events. [2023-08-04 02:53:26,689 INFO L125 PetriNetUnfolderBase]: For 67962/67962 co-relation queries the response was YES. [2023-08-04 02:53:28,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276381 conditions, 627410 events. 502792/627410 cut-off events. For 67962/67962 co-relation queries the response was YES. Maximal size of possible extension queue 9638. Compared 3549607 event pairs, 266466 based on Foata normal form. 0/459063 useless extension candidates. Maximal degree in co-relation 305500. Up to 604925 conditions per place. [2023-08-04 02:53:30,256 INFO L140 encePairwiseOnDemand]: 655/659 looper letters, 76 selfloop transitions, 2 changer transitions 3/87 dead transitions. [2023-08-04 02:53:30,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 420 flow [2023-08-04 02:53:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:53:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:53:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 899 transitions. [2023-08-04 02:53:30,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45472938796155793 [2023-08-04 02:53:30,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 899 transitions. [2023-08-04 02:53:30,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 899 transitions. [2023-08-04 02:53:30,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:53:30,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 899 transitions. [2023-08-04 02:53:30,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 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 02:53:30,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 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 02:53:30,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 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 02:53:30,262 INFO L175 Difference]: Start difference. First operand has 67 places, 81 transitions, 252 flow. Second operand 3 states and 899 transitions. [2023-08-04 02:53:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 420 flow [2023-08-04 02:53:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 420 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:53:30,284 INFO L231 Difference]: Finished difference. Result has 69 places, 78 transitions, 244 flow [2023-08-04 02:53:30,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=69, PETRI_TRANSITIONS=78} [2023-08-04 02:53:30,285 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-04 02:53:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 78 transitions, 244 flow [2023-08-04 02:53:30,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 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 02:53:30,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:53:30,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:53:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:53:30,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:53:30,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:53:30,286 INFO L85 PathProgramCache]: Analyzing trace with hash -641313772, now seen corresponding path program 1 times [2023-08-04 02:53:30,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:53:30,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914928430] [2023-08-04 02:53:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:30,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:53:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:53:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:53:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914928430] [2023-08-04 02:53:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914928430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:53:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127284657] [2023-08-04 02:53:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:53:30,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:53:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:53:30,333 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 02:53:30,358 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 02:53:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:53:30,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:53:30,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:53:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:53:30,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:53:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127284657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:53:30,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:53:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:53:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762147733] [2023-08-04 02:53:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:53:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:53:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:53:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:53:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:53:30,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 659 [2023-08-04 02:53:30,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 78 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 02:53:30,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:53:30,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 659 [2023-08-04 02:53:30,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:54:21,624 INFO L124 PetriNetUnfolderBase]: 498662/618913 cut-off events. [2023-08-04 02:54:21,624 INFO L125 PetriNetUnfolderBase]: For 66650/66650 co-relation queries the response was YES. [2023-08-04 02:54:23,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259822 conditions, 618913 events. 498662/618913 cut-off events. For 66650/66650 co-relation queries the response was YES. Maximal size of possible extension queue 9954. Compared 3432854 event pairs, 281346 based on Foata normal form. 0/452234 useless extension candidates. Maximal degree in co-relation 1259760. Up to 599208 conditions per place. [2023-08-04 02:54:26,114 INFO L140 encePairwiseOnDemand]: 656/659 looper letters, 85 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 02:54:26,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 448 flow [2023-08-04 02:54:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:54:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:54:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-04 02:54:26,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582701062215478 [2023-08-04 02:54:26,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-04 02:54:26,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-04 02:54:26,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:54:26,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-04 02:54:26,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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 02:54:26,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 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 02:54:26,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 659.0) internal successors, (2636), 4 states have internal predecessors, (2636), 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 02:54:26,135 INFO L175 Difference]: Start difference. First operand has 69 places, 78 transitions, 244 flow. Second operand 3 states and 906 transitions. [2023-08-04 02:54:26,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 448 flow [2023-08-04 02:54:26,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:54:26,416 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 242 flow [2023-08-04 02:54:26,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2023-08-04 02:54:26,418 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-08-04 02:54:26,418 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 242 flow [2023-08-04 02:54:26,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 02:54:26,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:54:26,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:54:26,434 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 02:54:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:54:26,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:54:26,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:54:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash -783370177, now seen corresponding path program 1 times [2023-08-04 02:54:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:54:26,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069549499] [2023-08-04 02:54:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:54:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:54:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:54:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069549499] [2023-08-04 02:54:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069549499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:54:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057339940] [2023-08-04 02:54:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:54:26,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:54:26,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:54:26,789 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 02:54:26,890 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 02:54:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:54:27,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:54:27,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:54:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:54:27,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:54:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057339940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:54:27,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:54:27,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:54:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829330122] [2023-08-04 02:54:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:54:27,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:54:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:54:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:54:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:54:27,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 659 [2023-08-04 02:54:27,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 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 02:54:27,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:54:27,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 659 [2023-08-04 02:54:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand