/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-three-array-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:27:46,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:27:46,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:27:46,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:27:46,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:27:46,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:27:46,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:27:46,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:27:46,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:27:46,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:27:46,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:27:46,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:27:46,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:27:46,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:27:46,984 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:27:46,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:27:46,984 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:27:46,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:27:46,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:27:46,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:27:46,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:27:46,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:27:46,986 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:27:46,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:27:46,986 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:27:46,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:27:46,987 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:27:46,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:27:46,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:27:46,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:27:46,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:27:46,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:27:46,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:27:46,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:27:46,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:27:46,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:27:46,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:27:46,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:27:46,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:27:46,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:27:46,991 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:27:46,991 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:27:47,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:27:47,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:27:47,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:27:47,214 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:27:47,214 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:27:47,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 03:27:48,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:27:48,565 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:27:48,565 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 03:27:48,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccced053/c32cba037e3c457b93487e121ded3a3e/FLAGe3ba5ea0b [2023-08-04 03:27:48,591 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccced053/c32cba037e3c457b93487e121ded3a3e [2023-08-04 03:27:48,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:27:48,597 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:27:48,600 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:27:48,600 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:27:48,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:27:48,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2974ba0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48, skipping insertion in model container [2023-08-04 03:27:48,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,630 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:27:48,792 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-three-array-sum.wvr_bound2.c[2934,2947] [2023-08-04 03:27:48,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:27:48,804 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:27:48,828 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-three-array-sum.wvr_bound2.c[2934,2947] [2023-08-04 03:27:48,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:27:48,840 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:27:48,840 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:27:48,846 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:27:48,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48 WrapperNode [2023-08-04 03:27:48,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:27:48,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:27:48,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:27:48,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:27:48,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,882 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 202 [2023-08-04 03:27:48,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:27:48,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:27:48,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:27:48,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:27:48,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,914 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:27:48,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:27:48,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:27:48,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:27:48,921 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (1/1) ... [2023-08-04 03:27:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:27:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:27:48,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:27:48,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:27:48,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:27:48,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:27:48,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:27:48,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:27:48,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:27:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:27:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:27:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:27:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:27:48,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:27:48,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:27:48,982 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:27:49,070 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:27:49,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:27:49,395 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:27:49,440 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:27:49,440 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 03:27:49,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:27:49 BoogieIcfgContainer [2023-08-04 03:27:49,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:27:49,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:27:49,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:27:49,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:27:49,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:27:48" (1/3) ... [2023-08-04 03:27:49,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9b3ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:27:49, skipping insertion in model container [2023-08-04 03:27:49,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:48" (2/3) ... [2023-08-04 03:27:49,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9b3ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:27:49, skipping insertion in model container [2023-08-04 03:27:49,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:27:49" (3/3) ... [2023-08-04 03:27:49,457 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-three-array-sum.wvr_bound2.c [2023-08-04 03:27:49,464 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:27:49,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:27:49,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:27:49,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:27:49,551 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:27:49,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,817 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 03:27:49,818 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:27:49,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 03:27:49,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:27:49,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 260 transitions, 562 flow [2023-08-04 03:27:49,949 INFO L124 PetriNetUnfolderBase]: 112/737 cut-off events. [2023-08-04 03:27:49,950 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:27:49,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 737 events. 112/737 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3408 event pairs, 0 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 450. Up to 16 conditions per place. [2023-08-04 03:27:49,965 INFO L119 LiptonReduction]: Number of co-enabled transitions 6858 [2023-08-04 03:27:56,448 INFO L134 LiptonReduction]: Checked pairs total: 14005 [2023-08-04 03:27:56,448 INFO L136 LiptonReduction]: Total number of compositions: 240 [2023-08-04 03:27:56,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:27:56,463 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;@61a2b411, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:27:56,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:27:56,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:27:56,470 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 03:27:56,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:27:56,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:27:56,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:27:56,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:27:56,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:27:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -984473471, now seen corresponding path program 1 times [2023-08-04 03:27:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:27:56,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178490592] [2023-08-04 03:27:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:27:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:27:56,612 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:27:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:27:56,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:27:56,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:27:56,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:27:56,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:27:56,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:27:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:27:56,709 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:27:56,711 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:27:56,712 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:27:56,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:27:56,750 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:27:56,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:57,407 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 03:27:57,407 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:27:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 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 03:27:57,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:57,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:57,488 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:27:57,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:57,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:57,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:27:58,059 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 03:27:58,060 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:27:58,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 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 03:27:58,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 18208 [2023-08-04 03:28:04,719 INFO L134 LiptonReduction]: Checked pairs total: 48305 [2023-08-04 03:28:04,719 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-08-04 03:28:04,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:28:04,722 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;@61a2b411, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:28:04,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:28:04,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:28:04,731 INFO L124 PetriNetUnfolderBase]: 22/135 cut-off events. [2023-08-04 03:28:04,731 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:28:04,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:04,731 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:04,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:28:04,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1114849615, now seen corresponding path program 1 times [2023-08-04 03:28:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:04,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918564521] [2023-08-04 03:28:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:04,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:28:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918564521] [2023-08-04 03:28:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918564521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873371741] [2023-08-04 03:28:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:04,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:28:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:28:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:05,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:28:05,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:28:05,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:05,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873371741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:05,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:05,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:28:05,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611862124] [2023-08-04 03:28:05,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:28:05,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 578 [2023-08-04 03:28:05,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:28:05,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:05,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 578 [2023-08-04 03:28:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:26,912 INFO L124 PetriNetUnfolderBase]: 1107970/1299595 cut-off events. [2023-08-04 03:29:26,912 INFO L125 PetriNetUnfolderBase]: For 109921/109921 co-relation queries the response was YES. [2023-08-04 03:29:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626957 conditions, 1299595 events. 1107970/1299595 cut-off events. For 109921/109921 co-relation queries the response was YES. Maximal size of possible extension queue 23407. Compared 6442905 event pairs, 360362 based on Foata normal form. 0/735665 useless extension candidates. Maximal degree in co-relation 795966. Up to 1266313 conditions per place. [2023-08-04 03:29:32,198 INFO L140 encePairwiseOnDemand]: 573/578 looper letters, 52 selfloop transitions, 5 changer transitions 31/101 dead transitions. [2023-08-04 03:29:32,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 458 flow [2023-08-04 03:29:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:29:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:29:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1357 transitions. [2023-08-04 03:29:32,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695501730103806 [2023-08-04 03:29:32,214 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1357 transitions. [2023-08-04 03:29:32,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1357 transitions. [2023-08-04 03:29:32,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:32,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1357 transitions. [2023-08-04 03:29:32,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.4) internal successors, (1357), 5 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:32,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:32,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:32,245 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 264 flow. Second operand 5 states and 1357 transitions. [2023-08-04 03:29:32,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 458 flow [2023-08-04 03:29:32,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:32,308 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 161 flow [2023-08-04 03:29:32,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2023-08-04 03:29:32,313 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2023-08-04 03:29:32,313 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 161 flow [2023-08-04 03:29:32,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 256.2) internal successors, (1281), 5 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:32,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:32,315 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:32,324 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 03:29:32,522 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 03:29:32,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:29:32,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2052717841, now seen corresponding path program 1 times [2023-08-04 03:29:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798957941] [2023-08-04 03:29:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:29:32,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:32,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798957941] [2023-08-04 03:29:32,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798957941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:32,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:29:32,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:29:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657495547] [2023-08-04 03:29:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:29:32,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:29:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:29:32,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 578 [2023-08-04 03:29:32,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 578 [2023-08-04 03:29:32,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:43,351 INFO L124 PetriNetUnfolderBase]: 168930/196535 cut-off events. [2023-08-04 03:29:43,351 INFO L125 PetriNetUnfolderBase]: For 5108/5108 co-relation queries the response was YES. [2023-08-04 03:29:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397504 conditions, 196535 events. 168930/196535 cut-off events. For 5108/5108 co-relation queries the response was YES. Maximal size of possible extension queue 3648. Compared 777831 event pairs, 70580 based on Foata normal form. 1/112861 useless extension candidates. Maximal degree in co-relation 140612. Up to 193230 conditions per place. [2023-08-04 03:29:44,578 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 03:29:44,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 264 flow [2023-08-04 03:29:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:29:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:29:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 813 transitions. [2023-08-04 03:29:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688581314878893 [2023-08-04 03:29:44,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 813 transitions. [2023-08-04 03:29:44,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 813 transitions. [2023-08-04 03:29:44,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:44,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 813 transitions. [2023-08-04 03:29:44,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:44,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:44,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:44,588 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 161 flow. Second operand 3 states and 813 transitions. [2023-08-04 03:29:44,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 264 flow [2023-08-04 03:29:44,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 259 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:44,596 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 155 flow [2023-08-04 03:29:44,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-08-04 03:29:44,597 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-08-04 03:29:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 155 flow [2023-08-04 03:29:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:44,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:44,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:29:44,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:29:44,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1980344073, now seen corresponding path program 1 times [2023-08-04 03:29:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884764765] [2023-08-04 03:29:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:29:44,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884764765] [2023-08-04 03:29:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884764765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488523196] [2023-08-04 03:29:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:44,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:29:44,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:29:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:44,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:29:44,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:29:44,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:29:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488523196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:44,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:29:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260213433] [2023-08-04 03:29:44,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:29:44,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 578 [2023-08-04 03:29:44,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 257.2) internal successors, (1286), 5 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:44,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:44,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 578 [2023-08-04 03:29:44,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:53,863 INFO L124 PetriNetUnfolderBase]: 144693/167570 cut-off events. [2023-08-04 03:29:53,863 INFO L125 PetriNetUnfolderBase]: For 3429/3429 co-relation queries the response was YES. [2023-08-04 03:29:54,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338190 conditions, 167570 events. 144693/167570 cut-off events. For 3429/3429 co-relation queries the response was YES. Maximal size of possible extension queue 3320. Compared 638986 event pairs, 44487 based on Foata normal form. 5/96559 useless extension candidates. Maximal degree in co-relation 140108. Up to 164857 conditions per place. [2023-08-04 03:29:54,816 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 52 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-08-04 03:29:54,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 288 flow [2023-08-04 03:29:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1072 transitions. [2023-08-04 03:29:54,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46366782006920415 [2023-08-04 03:29:54,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1072 transitions. [2023-08-04 03:29:54,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1072 transitions. [2023-08-04 03:29:54,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:54,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1072 transitions. [2023-08-04 03:29:54,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:54,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 578.0) internal successors, (2890), 5 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:54,828 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 578.0) internal successors, (2890), 5 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:54,828 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 155 flow. Second operand 4 states and 1072 transitions. [2023-08-04 03:29:54,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 288 flow [2023-08-04 03:29:54,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:54,831 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 152 flow [2023-08-04 03:29:54,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-04 03:29:54,832 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-04 03:29:54,832 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 152 flow [2023-08-04 03:29:54,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.2) internal successors, (1286), 5 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:54,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:54,833 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:29:54,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:29:55,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:29:55,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:29:55,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2072365922, now seen corresponding path program 1 times [2023-08-04 03:29:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:55,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490478825] [2023-08-04 03:29:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:29:55,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490478825] [2023-08-04 03:29:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490478825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135621806] [2023-08-04 03:29:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:55,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:55,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:29:55,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:29:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:55,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:29:55,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:29:55,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:29:55,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135621806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:55,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:29:55,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:29:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152106730] [2023-08-04 03:29:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:55,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:29:55,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:29:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:29:55,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 578 [2023-08-04 03:29:55,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 257.2) internal successors, (1286), 5 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:29:55,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:55,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 578 [2023-08-04 03:29:55,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:03,947 INFO L124 PetriNetUnfolderBase]: 136359/160348 cut-off events. [2023-08-04 03:30:03,947 INFO L125 PetriNetUnfolderBase]: For 2235/2235 co-relation queries the response was YES. [2023-08-04 03:30:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322148 conditions, 160348 events. 136359/160348 cut-off events. For 2235/2235 co-relation queries the response was YES. Maximal size of possible extension queue 3369. Compared 669931 event pairs, 23258 based on Foata normal form. 0/93787 useless extension candidates. Maximal degree in co-relation 86404. Up to 153575 conditions per place. [2023-08-04 03:30:04,827 INFO L140 encePairwiseOnDemand]: 574/578 looper letters, 71 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-08-04 03:30:04,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 88 transitions, 368 flow [2023-08-04 03:30:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:30:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:30:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1346 transitions. [2023-08-04 03:30:04,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657439446366782 [2023-08-04 03:30:04,831 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1346 transitions. [2023-08-04 03:30:04,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1346 transitions. [2023-08-04 03:30:04,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:04,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1346 transitions. [2023-08-04 03:30:04,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 269.2) internal successors, (1346), 5 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:04,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:04,840 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:04,840 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 152 flow. Second operand 5 states and 1346 transitions. [2023-08-04 03:30:04,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 88 transitions, 368 flow [2023-08-04 03:30:04,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 361 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:30:04,845 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 164 flow [2023-08-04 03:30:04,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-08-04 03:30:04,846 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -10 predicate places. [2023-08-04 03:30:04,846 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 164 flow [2023-08-04 03:30:04,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 257.2) internal successors, (1286), 5 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:04,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:04,847 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 03:30:04,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:30:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:05,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:30:05,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2064080663, now seen corresponding path program 1 times [2023-08-04 03:30:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476751710] [2023-08-04 03:30:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:30:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476751710] [2023-08-04 03:30:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476751710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:05,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:30:05,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:30:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623110722] [2023-08-04 03:30:05,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:05,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:30:05,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:30:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:30:05,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 578 [2023-08-04 03:30:05,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:05,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:05,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 578 [2023-08-04 03:30:05,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:13,670 INFO L124 PetriNetUnfolderBase]: 129139/151363 cut-off events. [2023-08-04 03:30:13,670 INFO L125 PetriNetUnfolderBase]: For 2787/2787 co-relation queries the response was YES. [2023-08-04 03:30:14,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304668 conditions, 151363 events. 129139/151363 cut-off events. For 2787/2787 co-relation queries the response was YES. Maximal size of possible extension queue 3366. Compared 618002 event pairs, 60133 based on Foata normal form. 25/88416 useless extension candidates. Maximal degree in co-relation 66598. Up to 146564 conditions per place. [2023-08-04 03:30:14,507 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-04 03:30:14,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 293 flow [2023-08-04 03:30:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:30:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:30:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2023-08-04 03:30:14,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47231833910034604 [2023-08-04 03:30:14,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2023-08-04 03:30:14,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2023-08-04 03:30:14,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:14,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2023-08-04 03:30:14,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,515 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 164 flow. Second operand 3 states and 819 transitions. [2023-08-04 03:30:14,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 293 flow [2023-08-04 03:30:14,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:30:14,518 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 162 flow [2023-08-04 03:30:14,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-04 03:30:14,519 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-04 03:30:14,519 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 162 flow [2023-08-04 03:30:14,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:14,520 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 03:30:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:30:14,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:30:14,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1034110121, now seen corresponding path program 1 times [2023-08-04 03:30:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:14,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305550348] [2023-08-04 03:30:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:30:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305550348] [2023-08-04 03:30:14,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305550348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110642067] [2023-08-04 03:30:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:14,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:30:14,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:30:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:14,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:30:14,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:30:14,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:30:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:30:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110642067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:30:14,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:30:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:30:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673147266] [2023-08-04 03:30:14,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:30:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:30:14,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 578 [2023-08-04 03:30:14,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 578 [2023-08-04 03:30:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:21,419 INFO L124 PetriNetUnfolderBase]: 101779/118698 cut-off events. [2023-08-04 03:30:21,419 INFO L125 PetriNetUnfolderBase]: For 2342/2342 co-relation queries the response was YES. [2023-08-04 03:30:21,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239018 conditions, 118698 events. 101779/118698 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 3045. Compared 466089 event pairs, 38338 based on Foata normal form. 75/69121 useless extension candidates. Maximal degree in co-relation 52100. Up to 113459 conditions per place. [2023-08-04 03:30:22,329 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 63 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 03:30:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 337 flow [2023-08-04 03:30:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:30:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:30:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1082 transitions. [2023-08-04 03:30:22,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679930795847751 [2023-08-04 03:30:22,333 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1082 transitions. [2023-08-04 03:30:22,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1082 transitions. [2023-08-04 03:30:22,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:22,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1082 transitions. [2023-08-04 03:30:22,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 270.5) internal successors, (1082), 4 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:22,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 578.0) internal successors, (2890), 5 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:22,339 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 578.0) internal successors, (2890), 5 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:22,339 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 162 flow. Second operand 4 states and 1082 transitions. [2023-08-04 03:30:22,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 337 flow [2023-08-04 03:30:22,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:30:22,341 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 159 flow [2023-08-04 03:30:22,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-04 03:30:22,342 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -8 predicate places. [2023-08-04 03:30:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 159 flow [2023-08-04 03:30:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:22,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:22,343 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 03:30:22,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:30:22,547 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 03:30:22,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:30:22,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1292353846, now seen corresponding path program 1 times [2023-08-04 03:30:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:22,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733491765] [2023-08-04 03:30:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:22,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:30:22,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:22,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733491765] [2023-08-04 03:30:22,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733491765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:30:22,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032407129] [2023-08-04 03:30:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:22,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:30:22,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:30:22,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:30:22,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:30:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:22,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:30:22,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:30:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:30:22,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:30:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032407129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:22,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:30:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:30:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38998994] [2023-08-04 03:30:22,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:22,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:30:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:30:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:30:22,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 578 [2023-08-04 03:30:22,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:22,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:22,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 578 [2023-08-04 03:30:22,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:27,302 INFO L124 PetriNetUnfolderBase]: 70939/83333 cut-off events. [2023-08-04 03:30:27,302 INFO L125 PetriNetUnfolderBase]: For 2792/2792 co-relation queries the response was YES. [2023-08-04 03:30:27,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168463 conditions, 83333 events. 70939/83333 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 2232. Compared 328617 event pairs, 2358 based on Foata normal form. 3600/52156 useless extension candidates. Maximal degree in co-relation 51064. Up to 36750 conditions per place. [2023-08-04 03:30:27,556 INFO L140 encePairwiseOnDemand]: 575/578 looper letters, 0 selfloop transitions, 0 changer transitions 104/104 dead transitions. [2023-08-04 03:30:27,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 104 transitions, 441 flow [2023-08-04 03:30:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:30:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:30:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1362 transitions. [2023-08-04 03:30:27,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471280276816609 [2023-08-04 03:30:27,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1362 transitions. [2023-08-04 03:30:27,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1362 transitions. [2023-08-04 03:30:27,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:30:27,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1362 transitions. [2023-08-04 03:30:27,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 272.4) internal successors, (1362), 5 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:27,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:27,566 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 578.0) internal successors, (3468), 6 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:27,566 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 159 flow. Second operand 5 states and 1362 transitions. [2023-08-04 03:30:27,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 104 transitions, 441 flow [2023-08-04 03:30:27,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:30:27,689 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 03:30:27,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 03:30:27,690 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2023-08-04 03:30:27,690 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 03:30:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 258.2) internal successors, (1291), 5 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:27,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:30:27,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:30:27,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:30:27,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:30:27,891 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 03:30:27,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:27,892 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:30:27,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,257 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 03:30:28,257 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:30:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 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 03:30:28,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:30:28,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 310 transitions, 710 flow [2023-08-04 03:30:28,877 INFO L124 PetriNetUnfolderBase]: 916/4273 cut-off events. [2023-08-04 03:30:28,877 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:30:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 4273 events. 916/4273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 33845 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 03:30:28,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 18208 [2023-08-04 03:30:34,724 INFO L134 LiptonReduction]: Checked pairs total: 48305 [2023-08-04 03:30:34,724 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-08-04 03:30:34,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:30:34,726 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;@61a2b411, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:30:34,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:30:34,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:30:34,729 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 03:30:34,730 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:30:34,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:30:34,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:30:34,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:30:34,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:30:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2145027171, now seen corresponding path program 1 times [2023-08-04 03:30:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:30:34,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777044352] [2023-08-04 03:30:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:30:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:30:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:30:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:30:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:30:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777044352] [2023-08-04 03:30:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777044352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:30:34,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:30:34,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:30:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620895549] [2023-08-04 03:30:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:30:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:30:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:30:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:30:34,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 578 [2023-08-04 03:30:34,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:30:34,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:34,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 578 [2023-08-04 03:30:34,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand