/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_parallel-ticket-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:13:01,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:13:01,589 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:13:01,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:13:01,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:13:01,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:13:01,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:13:01,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:13:01,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:13:01,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:13:01,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:13:01,611 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:13:01,612 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:13:01,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:13:01,612 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:13:01,614 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:13:01,614 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:13:01,614 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:13:01,614 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:13:01,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:13:01,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:13:01,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:13:01,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:13:01,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:13:01,626 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:13:01,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:13:01,626 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:13:01,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:13:01,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:13:01,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:13:01,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:13:01,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:13:01,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:13:01,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:13:01,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:13:01,629 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:13:01,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:13:01,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:13:01,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:13:01,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:13:01,813 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:13:01,814 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:13:01,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-03 20:13:02,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:13:02,887 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:13:02,887 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-3.wvr_bound2.c [2023-08-03 20:13:02,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14259182e/d260dc64c4a34bd28aad008b0d93e53b/FLAG67452fd1b [2023-08-03 20:13:02,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14259182e/d260dc64c4a34bd28aad008b0d93e53b [2023-08-03 20:13:02,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:13:02,903 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:13:02,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:13:02,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:13:02,907 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:13:02,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:13:02" (1/1) ... [2023-08-03 20:13:02,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760d74a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:02, skipping insertion in model container [2023-08-03 20:13:02,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:13:02" (1/1) ... [2023-08-03 20:13:02,923 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:13:03,068 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_parallel-ticket-3.wvr_bound2.c[3332,3345] [2023-08-03 20:13:03,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:13:03,079 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:13:03,118 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_parallel-ticket-3.wvr_bound2.c[3332,3345] [2023-08-03 20:13:03,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:13:03,124 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:13:03,124 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:13:03,128 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:13:03,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03 WrapperNode [2023-08-03 20:13:03,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:13:03,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:13:03,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:13:03,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:13:03,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,166 INFO L138 Inliner]: procedures = 22, calls = 55, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 213 [2023-08-03 20:13:03,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:13:03,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:13:03,166 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:13:03,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:13:03,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,178 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,184 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:13:03,185 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:13:03,186 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:13:03,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:13:03,186 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (1/1) ... [2023-08-03 20:13:03,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:13:03,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:13:03,218 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 20:13:03,224 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 20:13:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:13:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:13:03,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:13:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:13:03,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:13:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:13:03,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:13:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:13:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:13:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:13:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:13:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:13:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:13:03,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:13:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:13:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:13:03,246 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 20:13:03,332 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:13:03,334 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:13:03,581 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:13:03,634 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:13:03,634 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 20:13:03,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:13:03 BoogieIcfgContainer [2023-08-03 20:13:03,635 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:13:03,637 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:13:03,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:13:03,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:13:03,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:13:02" (1/3) ... [2023-08-03 20:13:03,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3d7274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:13:03, skipping insertion in model container [2023-08-03 20:13:03,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:13:03" (2/3) ... [2023-08-03 20:13:03,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3d7274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:13:03, skipping insertion in model container [2023-08-03 20:13:03,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:13:03" (3/3) ... [2023-08-03 20:13:03,640 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-ticket-3.wvr_bound2.c [2023-08-03 20:13:03,645 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:13:03,651 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:13:03,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:13:03,651 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:13:03,691 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:13:03,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 376 flow [2023-08-03 20:13:03,851 INFO L124 PetriNetUnfolderBase]: 83/619 cut-off events. [2023-08-03 20:13:03,851 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:13:03,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 619 events. 83/619 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3137 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 348. Up to 16 conditions per place. [2023-08-03 20:13:03,859 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 376 flow [2023-08-03 20:13:03,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 157 transitions, 356 flow [2023-08-03 20:13:03,865 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:13:03,874 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 157 transitions, 356 flow [2023-08-03 20:13:03,875 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 157 transitions, 356 flow [2023-08-03 20:13:03,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 157 transitions, 356 flow [2023-08-03 20:13:03,917 INFO L124 PetriNetUnfolderBase]: 83/539 cut-off events. [2023-08-03 20:13:03,918 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:13:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 539 events. 83/539 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2478 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 308. Up to 16 conditions per place. [2023-08-03 20:13:03,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 2814 [2023-08-03 20:13:06,604 INFO L134 LiptonReduction]: Checked pairs total: 13997 [2023-08-03 20:13:06,604 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 20:13:06,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:13:06,617 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;@309ed5bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:13:06,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:13:06,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:13:06,620 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-03 20:13:06,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:13:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:13:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 20:13:06,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:13:06,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:13:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1722870351, now seen corresponding path program 1 times [2023-08-03 20:13:06,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:13:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800923525] [2023-08-03 20:13:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:13:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:13:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:13:06,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:13:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:13:06,734 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:13:06,736 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:13:06,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:13:06,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:13:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:13:06,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:13:06,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:13:06,739 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 20:13:06,743 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:13:06,744 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:13:06,775 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:13:06,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 198 transitions, 486 flow [2023-08-03 20:13:07,119 INFO L124 PetriNetUnfolderBase]: 835/4033 cut-off events. [2023-08-03 20:13:07,120 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:13:07,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 4033 events. 835/4033 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 33052 event pairs, 33 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-03 20:13:07,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 198 transitions, 486 flow [2023-08-03 20:13:07,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 188 transitions, 466 flow [2023-08-03 20:13:07,147 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:13:07,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 188 transitions, 466 flow [2023-08-03 20:13:07,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 188 transitions, 466 flow [2023-08-03 20:13:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 188 transitions, 466 flow [2023-08-03 20:13:07,364 INFO L124 PetriNetUnfolderBase]: 835/3393 cut-off events. [2023-08-03 20:13:07,364 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:13:07,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 3393 events. 835/3393 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 25445 event pairs, 33 based on Foata normal form. 0/2866 useless extension candidates. Maximal degree in co-relation 2062. Up to 192 conditions per place. [2023-08-03 20:13:07,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 7152 [2023-08-03 20:13:10,303 INFO L134 LiptonReduction]: Checked pairs total: 51212 [2023-08-03 20:13:10,303 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-03 20:13:10,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:13:10,305 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;@309ed5bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:13:10,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:13:10,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:13:10,307 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-03 20:13:10,307 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:13:10,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:13:10,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:13:10,307 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 20:13:10,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:13:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -241389326, now seen corresponding path program 1 times [2023-08-03 20:13:10,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:13:10,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010672507] [2023-08-03 20:13:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:13:10,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:13:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:13:10,409 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 20:13:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:13:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010672507] [2023-08-03 20:13:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010672507] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:13:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:13:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 20:13:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699719941] [2023-08-03 20:13:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:13:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:13:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:13:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:13:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:13:10,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:13:10,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 20:13:10,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:13:10,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:13:10,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:13:57,502 INFO L124 PetriNetUnfolderBase]: 656063/892869 cut-off events. [2023-08-03 20:13:57,502 INFO L125 PetriNetUnfolderBase]: For 112648/112648 co-relation queries the response was YES. [2023-08-03 20:13:59,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784916 conditions, 892869 events. 656063/892869 cut-off events. For 112648/112648 co-relation queries the response was YES. Maximal size of possible extension queue 23269. Compared 7403837 event pairs, 502902 based on Foata normal form. 0/831800 useless extension candidates. Maximal degree in co-relation 503289. Up to 827362 conditions per place. [2023-08-03 20:14:02,946 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 64 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-03 20:14:02,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 388 flow [2023-08-03 20:14:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:14:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:14:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-03 20:14:02,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-03 20:14:02,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-03 20:14:02,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-03 20:14:02,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:14:02,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-03 20:14:02,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 20:14:02,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:14:02,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:14:02,967 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 246 flow. Second operand 3 states and 496 transitions. [2023-08-03 20:14:02,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 388 flow [2023-08-03 20:14:03,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:14:03,017 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 258 flow [2023-08-03 20:14:03,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-03 20:14:03,021 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-03 20:14:03,021 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 258 flow [2023-08-03 20:14:03,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 20:14:03,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:14:03,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 20:14:03,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:14:03,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:14:03,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:14:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 954348218, now seen corresponding path program 1 times [2023-08-03 20:14:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:14:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837410622] [2023-08-03 20:14:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:14:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:14:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:14:03,078 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 20:14:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:14:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837410622] [2023-08-03 20:14:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837410622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:14:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908619522] [2023-08-03 20:14:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:14:03,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:14:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:14:03,081 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 20:14:03,085 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 20:14:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:14:03,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:14:03,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:14:03,181 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 20:14:03,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:14:03,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908619522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:14:03,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:14:03,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 20:14:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469510007] [2023-08-03 20:14:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:14:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:14:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:14:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:14:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:14:03,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-03 20:14:03,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 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 20:14:03,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:14:03,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-03 20:14:03,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:14:49,916 INFO L124 PetriNetUnfolderBase]: 656039/892729 cut-off events. [2023-08-03 20:14:49,916 INFO L125 PetriNetUnfolderBase]: For 112620/112620 co-relation queries the response was YES. [2023-08-03 20:14:52,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784775 conditions, 892729 events. 656039/892729 cut-off events. For 112620/112620 co-relation queries the response was YES. Maximal size of possible extension queue 23269. Compared 7401548 event pairs, 401976 based on Foata normal form. 16/831810 useless extension candidates. Maximal degree in co-relation 627592. Up to 827279 conditions per place. [2023-08-03 20:14:55,566 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 69 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-03 20:14:55,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 422 flow [2023-08-03 20:14:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:14:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:14:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 784 transitions. [2023-08-03 20:14:55,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2023-08-03 20:14:55,570 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 784 transitions. [2023-08-03 20:14:55,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 784 transitions. [2023-08-03 20:14:55,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:14:55,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 784 transitions. [2023-08-03 20:14:55,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 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 20:14:55,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:14:55,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:14:55,575 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 258 flow. Second operand 5 states and 784 transitions. [2023-08-03 20:14:55,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 422 flow [2023-08-03 20:14:55,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 412 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:14:55,612 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 263 flow [2023-08-03 20:14:55,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2023-08-03 20:14:55,613 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2023-08-03 20:14:55,613 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 263 flow [2023-08-03 20:14:55,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 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 20:14:55,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:14:55,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:14:55,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:14:55,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:14:55,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === 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 20:14:55,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:14:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 380308586, now seen corresponding path program 1 times [2023-08-03 20:14:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:14:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481260060] [2023-08-03 20:14:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:14:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:14:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:14:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:14:55,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:14:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481260060] [2023-08-03 20:14:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481260060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:14:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140991092] [2023-08-03 20:14:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:14:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:14:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:14:55,875 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) [2023-08-03 20:14:55,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:14:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:14:55,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:14:55,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:14:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:14:55,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:14:55,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140991092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:14:55,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:14:55,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:14:55,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091343155] [2023-08-03 20:14:55,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:14:55,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:14:55,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:14:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:14:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:14:55,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:14:55,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 20:14:55,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:14:55,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:14:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:15:42,184 INFO L124 PetriNetUnfolderBase]: 652625/885847 cut-off events. [2023-08-03 20:15:42,184 INFO L125 PetriNetUnfolderBase]: For 97459/97459 co-relation queries the response was YES. [2023-08-03 20:15:44,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764763 conditions, 885847 events. 652625/885847 cut-off events. For 97459/97459 co-relation queries the response was YES. Maximal size of possible extension queue 23502. Compared 7272767 event pairs, 500989 based on Foata normal form. 0/826766 useless extension candidates. Maximal degree in co-relation 516100. Up to 822392 conditions per place. [2023-08-03 20:15:47,551 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 71 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-03 20:15:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 433 flow [2023-08-03 20:15:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:15:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:15:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-03 20:15:47,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2023-08-03 20:15:47,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-03 20:15:47,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-03 20:15:47,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:15:47,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-03 20:15:47,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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 20:15:47,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:15:47,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:15:47,556 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 263 flow. Second operand 3 states and 502 transitions. [2023-08-03 20:15:47,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 433 flow [2023-08-03 20:15:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 90 transitions, 426 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:15:47,570 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 271 flow [2023-08-03 20:15:47,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-03 20:15:47,572 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 6 predicate places. [2023-08-03 20:15:47,572 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 271 flow [2023-08-03 20:15:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 20:15:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:15:47,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:15:47,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 20:15:47,781 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 [2023-08-03 20:15:47,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === 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 20:15:47,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:15:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 40018862, now seen corresponding path program 1 times [2023-08-03 20:15:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:15:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044344783] [2023-08-03 20:15:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:15:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:15:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:15:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:15:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:15:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044344783] [2023-08-03 20:15:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044344783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:15:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829787342] [2023-08-03 20:15:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:15:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:15:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:15:47,836 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) [2023-08-03 20:15:47,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:15:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:15:47,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:15:47,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:15:47,903 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 20:15:47,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:15:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829787342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:15:47,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:15:47,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 20:15:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391418649] [2023-08-03 20:15:47,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:15:47,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:15:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:15:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:15:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:15:47,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:15:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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 20:15:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:15:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:15:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:16:34,185 INFO L124 PetriNetUnfolderBase]: 652225/874487 cut-off events. [2023-08-03 20:16:34,186 INFO L125 PetriNetUnfolderBase]: For 68086/68086 co-relation queries the response was YES. [2023-08-03 20:16:37,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1753883 conditions, 874487 events. 652225/874487 cut-off events. For 68086/68086 co-relation queries the response was YES. Maximal size of possible extension queue 23912. Compared 7006410 event pairs, 497536 based on Foata normal form. 0/816381 useless extension candidates. Maximal degree in co-relation 512128. Up to 813394 conditions per place. [2023-08-03 20:16:39,869 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 79 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-08-03 20:16:39,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 467 flow [2023-08-03 20:16:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:16:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:16:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-03 20:16:39,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2023-08-03 20:16:39,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-03 20:16:39,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-03 20:16:39,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:16:39,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-03 20:16:39,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 20:16:39,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:16:39,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:16:39,874 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 271 flow. Second operand 3 states and 508 transitions. [2023-08-03 20:16:39,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 467 flow [2023-08-03 20:16:39,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 97 transitions, 464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:16:39,891 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 280 flow [2023-08-03 20:16:39,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=78, 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=280, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2023-08-03 20:16:39,891 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 8 predicate places. [2023-08-03 20:16:39,892 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 280 flow [2023-08-03 20:16:39,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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 20:16:39,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:16:39,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:16:39,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 20:16:40,096 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 [2023-08-03 20:16:40,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === 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 20:16:40,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:16:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2104011733, now seen corresponding path program 1 times [2023-08-03 20:16:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:16:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90607667] [2023-08-03 20:16:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:16:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:16:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:16:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:16:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:16:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90607667] [2023-08-03 20:16:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90607667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:16:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615279543] [2023-08-03 20:16:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:16:40,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:16:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:16:40,129 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) [2023-08-03 20:16:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:16:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:16:40,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:16:40,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:16:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:16:40,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:16:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:16:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615279543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:16:40,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:16:40,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:16:40,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222330988] [2023-08-03 20:16:40,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:16:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:16:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:16:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:16:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:16:40,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-03 20:16:40,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 20:16:40,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:16:40,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-03 20:16:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:17:26,256 INFO L124 PetriNetUnfolderBase]: 634479/848577 cut-off events. [2023-08-03 20:17:26,256 INFO L125 PetriNetUnfolderBase]: For 79055/79055 co-relation queries the response was YES. [2023-08-03 20:17:29,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1717320 conditions, 848577 events. 634479/848577 cut-off events. For 79055/79055 co-relation queries the response was YES. Maximal size of possible extension queue 22739. Compared 6722224 event pairs, 423757 based on Foata normal form. 4/798554 useless extension candidates. Maximal degree in co-relation 369132. Up to 799272 conditions per place. [2023-08-03 20:17:32,021 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 71 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-03 20:17:32,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 442 flow [2023-08-03 20:17:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:17:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:17:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-03 20:17:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50078125 [2023-08-03 20:17:32,024 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-03 20:17:32,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-03 20:17:32,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:17:32,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-03 20:17:32,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 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 20:17:32,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 20:17:32,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 20:17:32,027 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 280 flow. Second operand 4 states and 641 transitions. [2023-08-03 20:17:32,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 442 flow [2023-08-03 20:17:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 90 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:17:32,057 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 276 flow [2023-08-03 20:17:32,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-03 20:17:32,058 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-08-03 20:17:32,058 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 276 flow [2023-08-03 20:17:32,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 20:17:32,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:17:32,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:17:32,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 20:17:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:17:32,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === 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 20:17:32,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:17:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1482981124, now seen corresponding path program 1 times [2023-08-03 20:17:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:17:32,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670965331] [2023-08-03 20:17:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:17:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:17:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:17:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:17:32,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:17:32,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670965331] [2023-08-03 20:17:32,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670965331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:17:32,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162587979] [2023-08-03 20:17:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:17:32,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:17:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:17:32,333 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) [2023-08-03 20:17:32,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:17:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:17:32,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:17:32,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:17:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:17:32,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:17:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162587979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:17:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:17:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:17:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134602309] [2023-08-03 20:17:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:17:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:17:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:17:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:17:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:17:32,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-03 20:17:32,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 20:17:32,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:17:32,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-03 20:17:32,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:18:18,115 INFO L124 PetriNetUnfolderBase]: 633711/847149 cut-off events. [2023-08-03 20:18:18,116 INFO L125 PetriNetUnfolderBase]: For 76901/76901 co-relation queries the response was YES. [2023-08-03 20:18:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1713481 conditions, 847149 events. 633711/847149 cut-off events. For 76901/76901 co-relation queries the response was YES. Maximal size of possible extension queue 22738. Compared 6705619 event pairs, 193505 based on Foata normal form. 256/797629 useless extension candidates. Maximal degree in co-relation 608947. Up to 796719 conditions per place. [2023-08-03 20:18:23,841 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 89 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2023-08-03 20:18:23,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 518 flow [2023-08-03 20:18:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:18:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:18:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2023-08-03 20:18:23,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50125 [2023-08-03 20:18:23,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2023-08-03 20:18:23,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2023-08-03 20:18:23,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:18:23,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2023-08-03 20:18:23,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 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 20:18:23,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:18:23,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:18:23,846 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 276 flow. Second operand 5 states and 802 transitions. [2023-08-03 20:18:23,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 518 flow [2023-08-03 20:18:23,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 504 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:18:23,898 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 279 flow [2023-08-03 20:18:23,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-03 20:18:23,898 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 10 predicate places. [2023-08-03 20:18:23,898 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 279 flow [2023-08-03 20:18:23,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 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 20:18:23,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:18:23,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:18:23,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 20:18:24,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:18:24,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === 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 20:18:24,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:18:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 327467510, now seen corresponding path program 1 times [2023-08-03 20:18:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:18:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919056963] [2023-08-03 20:18:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:18:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:18:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:18:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:18:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:18:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919056963] [2023-08-03 20:18:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919056963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:18:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256080705] [2023-08-03 20:18:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:18:24,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:18:24,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:18:24,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:18:24,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:18:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:18:24,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:18:24,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:18:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:18:24,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:18:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256080705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:18:24,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:18:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:18:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925811349] [2023-08-03 20:18:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:18:24,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:18:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:18:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:18:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:18:24,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:18:24,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 20:18:24,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:18:24,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:18:24,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:03,155 INFO L124 PetriNetUnfolderBase]: 508079/681421 cut-off events. [2023-08-03 20:19:03,155 INFO L125 PetriNetUnfolderBase]: For 50834/50834 co-relation queries the response was YES. [2023-08-03 20:19:05,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381910 conditions, 681421 events. 508079/681421 cut-off events. For 50834/50834 co-relation queries the response was YES. Maximal size of possible extension queue 18354. Compared 5326583 event pairs, 388992 based on Foata normal form. 0/646745 useless extension candidates. Maximal degree in co-relation 518317. Up to 541016 conditions per place. [2023-08-03 20:19:07,648 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 89 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-03 20:19:07,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 527 flow [2023-08-03 20:19:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-03 20:19:07,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-03 20:19:07,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-03 20:19:07,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-03 20:19:07,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:07,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-03 20:19:07,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 20:19:07,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:19:07,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:19:07,653 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 279 flow. Second operand 3 states and 517 transitions. [2023-08-03 20:19:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 527 flow [2023-08-03 20:19:07,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 106 transitions, 520 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:19:07,683 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 284 flow [2023-08-03 20:19:07,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=81, 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=284, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2023-08-03 20:19:07,683 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2023-08-03 20:19:07,684 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 284 flow [2023-08-03 20:19:07,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 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 20:19:07,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:07,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:07,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 20:19:07,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:07,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === 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 20:19:07,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1930970393, now seen corresponding path program 1 times [2023-08-03 20:19:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379183946] [2023-08-03 20:19:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:19:07,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379183946] [2023-08-03 20:19:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379183946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072225409] [2023-08-03 20:19:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:07,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:07,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:19:07,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:19:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:07,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:19:07,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:19:07,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:19:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:19:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072225409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:19:08,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:19:08,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:19:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005341132] [2023-08-03 20:19:08,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:19:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:08,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-03 20:19:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 20:19:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-03 20:19:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:45,811 INFO L124 PetriNetUnfolderBase]: 480527/643661 cut-off events. [2023-08-03 20:19:45,812 INFO L125 PetriNetUnfolderBase]: For 83475/83475 co-relation queries the response was YES. [2023-08-03 20:19:48,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339961 conditions, 643661 events. 480527/643661 cut-off events. For 83475/83475 co-relation queries the response was YES. Maximal size of possible extension queue 17156. Compared 4935022 event pairs, 300418 based on Foata normal form. 64/620390 useless extension candidates. Maximal degree in co-relation 513429. Up to 610216 conditions per place. [2023-08-03 20:19:50,255 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 84 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-08-03 20:19:50,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 102 transitions, 496 flow [2023-08-03 20:19:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:19:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:19:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 653 transitions. [2023-08-03 20:19:50,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51015625 [2023-08-03 20:19:50,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 653 transitions. [2023-08-03 20:19:50,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 653 transitions. [2023-08-03 20:19:50,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:50,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 653 transitions. [2023-08-03 20:19:50,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 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 20:19:50,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 20:19:50,260 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 320.0) internal successors, (1600), 5 states have internal predecessors, (1600), 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 20:19:50,260 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 284 flow. Second operand 4 states and 653 transitions. [2023-08-03 20:19:50,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 102 transitions, 496 flow [2023-08-03 20:19:51,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:19:51,659 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 280 flow [2023-08-03 20:19:51,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2023-08-03 20:19:51,660 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 13 predicate places. [2023-08-03 20:19:51,660 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 280 flow [2023-08-03 20:19:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 20:19:51,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:51,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:51,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 20:19:51,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:51,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === 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 20:19:51,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash 879858250, now seen corresponding path program 1 times [2023-08-03 20:19:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:51,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970560090] [2023-08-03 20:19:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:51,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:19:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970560090] [2023-08-03 20:19:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970560090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849102087] [2023-08-03 20:19:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:51,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:19:51,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:19:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:51,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:19:51,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:19:52,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:19:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849102087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:52,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:19:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:19:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609656621] [2023-08-03 20:19:52,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:52,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:52,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:19:52,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 320 [2023-08-03 20:19:52,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 20:19:52,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:52,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 320 [2023-08-03 20:19:52,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:28,044 INFO L124 PetriNetUnfolderBase]: 462095/615597 cut-off events. [2023-08-03 20:20:28,045 INFO L125 PetriNetUnfolderBase]: For 52459/52459 co-relation queries the response was YES. [2023-08-03 20:20:30,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280233 conditions, 615597 events. 462095/615597 cut-off events. For 52459/52459 co-relation queries the response was YES. Maximal size of possible extension queue 17002. Compared 4668460 event pairs, 8218 based on Foata normal form. 4096/596610 useless extension candidates. Maximal degree in co-relation 499073. Up to 551247 conditions per place. [2023-08-03 20:20:31,983 INFO L140 encePairwiseOnDemand]: 316/320 looper letters, 108 selfloop transitions, 4 changer transitions 0/126 dead transitions. [2023-08-03 20:20:31,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 596 flow [2023-08-03 20:20:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2023-08-03 20:20:31,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-08-03 20:20:31,985 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2023-08-03 20:20:31,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2023-08-03 20:20:31,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:31,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2023-08-03 20:20:31,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 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 20:20:31,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:20:31,989 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 20:20:31,989 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 280 flow. Second operand 5 states and 820 transitions. [2023-08-03 20:20:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 596 flow [2023-08-03 20:20:36,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 582 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:20:36,171 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 283 flow [2023-08-03 20:20:36,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2023-08-03 20:20:36,172 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 13 predicate places. [2023-08-03 20:20:36,172 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 283 flow [2023-08-03 20:20:36,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 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 20:20:36,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:36,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:20:36,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 20:20:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 20:20:36,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 20:20:36,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1078073932, now seen corresponding path program 1 times [2023-08-03 20:20:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743059463] [2023-08-03 20:20:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:20:36,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743059463] [2023-08-03 20:20:36,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743059463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96501980] [2023-08-03 20:20:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:36,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:20:36,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:20:36,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:20:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:36,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:20:36,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:20:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:20:36,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:20:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96501980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:20:36,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:20:36,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:20:36,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536429847] [2023-08-03 20:20:36,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:20:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:20:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:20:36,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:20:36,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 20:20:36,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:36,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:20:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:21:08,696 INFO L124 PetriNetUnfolderBase]: 406130/548916 cut-off events. [2023-08-03 20:21:08,696 INFO L125 PetriNetUnfolderBase]: For 96115/96115 co-relation queries the response was YES. [2023-08-03 20:21:10,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154463 conditions, 548916 events. 406130/548916 cut-off events. For 96115/96115 co-relation queries the response was YES. Maximal size of possible extension queue 12594. Compared 4248479 event pairs, 296542 based on Foata normal form. 0/536777 useless extension candidates. Maximal degree in co-relation 463812. Up to 397176 conditions per place. [2023-08-03 20:21:12,925 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 90 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-03 20:21:12,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 531 flow [2023-08-03 20:21:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:21:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:21:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-03 20:21:12,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-03 20:21:12,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-03 20:21:12,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-03 20:21:12,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:21:12,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-03 20:21:12,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 20:21:12,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:21:12,929 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:21:12,929 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 283 flow. Second operand 3 states and 517 transitions. [2023-08-03 20:21:12,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 531 flow [2023-08-03 20:21:14,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 524 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:21:14,437 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 288 flow [2023-08-03 20:21:14,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=84, 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=288, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-08-03 20:21:14,438 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2023-08-03 20:21:14,438 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 288 flow [2023-08-03 20:21:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 20:21:14,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:21:14,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:21:14,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 20:21:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:21:14,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === 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 20:21:14,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:21:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -39891017, now seen corresponding path program 1 times [2023-08-03 20:21:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:21:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160629545] [2023-08-03 20:21:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:21:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:21:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:21:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:21:14,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:21:14,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160629545] [2023-08-03 20:21:14,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160629545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:21:14,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997615298] [2023-08-03 20:21:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:21:14,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:21:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:21:14,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:21:14,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:21:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:21:14,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:21:14,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:21:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:21:14,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:21:14,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997615298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:21:14,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:21:14,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:21:14,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647465301] [2023-08-03 20:21:14,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:21:14,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:21:14,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:21:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:21:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:21:14,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 320 [2023-08-03 20:21:14,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 20:21:14,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:21:14,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 320 [2023-08-03 20:21:14,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:21:51,045 INFO L124 PetriNetUnfolderBase]: 401045/543611 cut-off events. [2023-08-03 20:21:51,045 INFO L125 PetriNetUnfolderBase]: For 96813/96813 co-relation queries the response was YES. [2023-08-03 20:21:53,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167985 conditions, 543611 events. 401045/543611 cut-off events. For 96813/96813 co-relation queries the response was YES. Maximal size of possible extension queue 11944. Compared 4215438 event pairs, 351061 based on Foata normal form. 0/540697 useless extension candidates. Maximal degree in co-relation 625136. Up to 469174 conditions per place. [2023-08-03 20:21:55,128 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 91 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-03 20:21:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 538 flow [2023-08-03 20:21:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:21:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:21:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-03 20:21:55,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-08-03 20:21:55,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-03 20:21:55,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-03 20:21:55,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:21:55,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-03 20:21:55,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 20:21:55,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:21:55,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 20:21:55,132 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 288 flow. Second operand 3 states and 517 transitions. [2023-08-03 20:21:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 538 flow