/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:33:16,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:33:16,803 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:33:16,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:33:16,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:33:16,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:33:16,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:33:16,839 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:33:16,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:33:16,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:33:16,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:33:16,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:33:16,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:33:16,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:33:16,845 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:33:16,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:33:16,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:33:16,846 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:33:16,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:33:16,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:33:16,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:33:16,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:33:16,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:33:16,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:33:16,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:33:16,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:33:16,848 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:33:16,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:33:16,848 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:33:16,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:33:16,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:33:16,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:33:16,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:33:16,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:33:16,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:33:16,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:33:16,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:33:16,850 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:33:16,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:33:16,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:33:16,850 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:33:16,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:33:17,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:33:17,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:33:17,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:33:17,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:33:17,078 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:33:17,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-03 20:33:18,190 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:33:18,360 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:33:18,360 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-03 20:33:18,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bfccb39d/eef0865e5f9347419c3c9ba986f410ce/FLAGbf2161f67 [2023-08-03 20:33:18,386 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bfccb39d/eef0865e5f9347419c3c9ba986f410ce [2023-08-03 20:33:18,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:33:18,393 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:33:18,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:33:18,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:33:18,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:33:18,399 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e60dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18, skipping insertion in model container [2023-08-03 20:33:18,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,420 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:33:18,571 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c[3078,3091] [2023-08-03 20:33:18,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:33:18,585 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:33:18,607 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c[3078,3091] [2023-08-03 20:33:18,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:33:18,618 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:33:18,618 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:33:18,623 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:33:18,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18 WrapperNode [2023-08-03 20:33:18,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:33:18,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:33:18,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:33:18,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:33:18,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,637 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,661 INFO L138 Inliner]: procedures = 25, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 332 [2023-08-03 20:33:18,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:33:18,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:33:18,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:33:18,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:33:18,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,672 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,688 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:33:18,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:33:18,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:33:18,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:33:18,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (1/1) ... [2023-08-03 20:33:18,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:33:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:33:18,720 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) [2023-08-03 20:33:18,733 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 [2023-08-03 20:33:18,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:33:18,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:33:18,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:33:18,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:33:18,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:33:18,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:33:18,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:33:18,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:33:18,757 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:33:18,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:33:18,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:33:18,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:33:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:33:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:33:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:33:18,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:33:18,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:33:18,759 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:33:18,857 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:33:18,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:33:19,242 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:33:19,473 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:33:19,473 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-03 20:33:19,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:33:19 BoogieIcfgContainer [2023-08-03 20:33:19,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:33:19,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:33:19,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:33:19,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:33:19,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:33:18" (1/3) ... [2023-08-03 20:33:19,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a25dad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:33:19, skipping insertion in model container [2023-08-03 20:33:19,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:33:18" (2/3) ... [2023-08-03 20:33:19,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a25dad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:33:19, skipping insertion in model container [2023-08-03 20:33:19,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:33:19" (3/3) ... [2023-08-03 20:33:19,482 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-03 20:33:19,487 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:33:19,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:33:19,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:33:19,495 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:33:19,569 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:33:19,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,814 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-03 20:33:19,815 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:33:19,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-03 20:33:19,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:33:19,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-03 20:33:19,931 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-03 20:33:19,931 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:33:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-03 20:33:19,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-03 20:33:26,111 INFO L134 LiptonReduction]: Checked pairs total: 11121 [2023-08-03 20:33:26,111 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-03 20:33:26,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:33:26,126 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;@34a22e87, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:33:26,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:33:26,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:33:26,131 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-03 20:33:26,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:33:26,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:33:26,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:33:26,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:33:26,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:33:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1556583507, now seen corresponding path program 1 times [2023-08-03 20:33:26,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:33:26,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694881508] [2023-08-03 20:33:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:33:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:33:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:33:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:33:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:33:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694881508] [2023-08-03 20:33:26,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694881508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:33:26,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:33:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:33:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826813290] [2023-08-03 20:33:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:33:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:33:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:33:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:33:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:33:26,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 443 [2023-08-03 20:33:26,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:33:26,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:33:26,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 443 [2023-08-03 20:33:26,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:33:27,684 INFO L124 PetriNetUnfolderBase]: 4330/6085 cut-off events. [2023-08-03 20:33:27,684 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-08-03 20:33:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12258 conditions, 6085 events. 4330/6085 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31436 event pairs, 2418 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 9872. Up to 5804 conditions per place. [2023-08-03 20:33:27,726 INFO L140 encePairwiseOnDemand]: 437/443 looper letters, 42 selfloop transitions, 4 changer transitions 1/56 dead transitions. [2023-08-03 20:33:27,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 248 flow [2023-08-03 20:33:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:33:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:33:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2023-08-03 20:33:27,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45767494356659144 [2023-08-03 20:33:27,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2023-08-03 20:33:27,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2023-08-03 20:33:27,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:33:27,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2023-08-03 20:33:27,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 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) [2023-08-03 20:33:27,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-03 20:33:27,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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) [2023-08-03 20:33:27,769 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 150 flow. Second operand 4 states and 811 transitions. [2023-08-03 20:33:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 248 flow [2023-08-03 20:33:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:33:27,777 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 174 flow [2023-08-03 20:33:27,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-08-03 20:33:27,782 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-03 20:33:27,782 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 174 flow [2023-08-03 20:33:27,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:33:27,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:33:27,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:33:27,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:33:27,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:33:27,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:33:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1015486050, now seen corresponding path program 1 times [2023-08-03 20:33:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:33:27,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815632110] [2023-08-03 20:33:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:33:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:33:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:33:27,871 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:33:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:33:27,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:33:27,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:33:27,905 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:33:27,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:33:27,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:33:27,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:33:27,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:33:27,908 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:33:27,910 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:33:27,910 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:33:27,953 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:33:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:28,475 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-03 20:33:28,476 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:33:28,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-03 20:33:28,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:28,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:28,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:33:28,538 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:28,538 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:28,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-03 20:33:29,011 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-03 20:33:29,011 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:33:29,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33751 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-03 20:33:29,110 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-03 20:33:35,406 INFO L134 LiptonReduction]: Checked pairs total: 35581 [2023-08-03 20:33:35,406 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-03 20:33:35,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:33:35,414 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;@34a22e87, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:33:35,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:33:35,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:33:35,419 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-03 20:33:35,419 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:33:35,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:33:35,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:33:35,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:33:35,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:33:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 886699493, now seen corresponding path program 1 times [2023-08-03 20:33:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:33:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671880703] [2023-08-03 20:33:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:33:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:33:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:33:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:33:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:33:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671880703] [2023-08-03 20:33:35,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671880703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:33:35,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:33:35,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:33:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122331418] [2023-08-03 20:33:35,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:33:35,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:33:35,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:33:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:33:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:33:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 509 [2023-08-03 20:33:35,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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) [2023-08-03 20:33:35,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:33:35,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 509 [2023-08-03 20:33:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:35:08,939 INFO L124 PetriNetUnfolderBase]: 1058318/1259677 cut-off events. [2023-08-03 20:35:08,940 INFO L125 PetriNetUnfolderBase]: For 124209/124209 co-relation queries the response was YES. [2023-08-03 20:35:12,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552431 conditions, 1259677 events. 1058318/1259677 cut-off events. For 124209/124209 co-relation queries the response was YES. Maximal size of possible extension queue 24649. Compared 6763598 event pairs, 534271 based on Foata normal form. 0/797565 useless extension candidates. Maximal degree in co-relation 925594. Up to 1228711 conditions per place. [2023-08-03 20:35:18,592 INFO L140 encePairwiseOnDemand]: 505/509 looper letters, 68 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-03 20:35:18,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 400 flow [2023-08-03 20:35:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:35:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:35:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-03 20:35:18,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481335952848723 [2023-08-03 20:35:18,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-03 20:35:18,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-03 20:35:18,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:35:18,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-03 20:35:18,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-08-03 20:35:18,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 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) [2023-08-03 20:35:18,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 509.0) internal successors, (2036), 4 states have internal predecessors, (2036), 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) [2023-08-03 20:35:18,629 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 252 flow. Second operand 3 states and 735 transitions. [2023-08-03 20:35:18,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 400 flow [2023-08-03 20:35:18,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:35:18,782 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 262 flow [2023-08-03 20:35:18,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2023-08-03 20:35:18,783 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-03 20:35:18,783 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 262 flow [2023-08-03 20:35:18,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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) [2023-08-03 20:35:18,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:35:18,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 20:35:18,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:35:18,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:35:18,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:35:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1666103251, now seen corresponding path program 1 times [2023-08-03 20:35:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:35:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645218167] [2023-08-03 20:35:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:35:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:35:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:35:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:35:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:35:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645218167] [2023-08-03 20:35:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645218167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:35:18,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601133619] [2023-08-03 20:35:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:35:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:35:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:35:18,917 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) [2023-08-03 20:35:18,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:35:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:35:19,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:35:19,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:35:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:35:19,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:35:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601133619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:35:19,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:35:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:35:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629987252] [2023-08-03 20:35:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:35:19,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:35:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:35:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:35:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:35:19,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 509 [2023-08-03 20:35:19,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 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) [2023-08-03 20:35:19,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:35:19,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 509 [2023-08-03 20:35:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand