/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:19:28,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:19:28,887 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:19:28,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:19:28,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:19:28,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:19:28,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:19:28,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:19:28,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:19:28,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:19:28,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:19:28,923 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:19:28,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:19:28,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:19:28,924 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:19:28,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:19:28,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:19:28,925 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:19:28,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:19:28,926 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:19:28,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:19:28,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:19:28,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:19:28,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:19:28,927 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:19:28,927 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:19:28,928 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:19:28,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:19:28,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:19:28,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:19:28,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:19:28,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:19:28,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:19:28,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:19:28,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:19:28,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:19:28,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:19:28,930 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:19:28,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:19:28,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:19:28,931 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:19:28,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:19:29,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:19:29,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:19:29,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:19:29,189 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:19:29,189 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:19:29,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-03 20:19:30,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:19:30,456 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:19:30,457 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-03 20:19:30,464 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0a5adc9/3b50cd2610cf434085dc110da64e62d7/FLAGa2c727ada [2023-08-03 20:19:30,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0a5adc9/3b50cd2610cf434085dc110da64e62d7 [2023-08-03 20:19:30,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:19:30,486 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:19:30,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:19:30,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:19:30,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:19:30,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df2a452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30, skipping insertion in model container [2023-08-03 20:19:30,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,518 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:19:30,654 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-03 20:19:30,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:19:30,672 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:19:30,714 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-03 20:19:30,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:19:30,731 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:19:30,731 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:19:30,737 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:19:30,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30 WrapperNode [2023-08-03 20:19:30,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:19:30,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:19:30,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:19:30,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:19:30,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,791 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2023-08-03 20:19:30,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:19:30,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:19:30,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:19:30,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:19:30,800 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,828 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:19:30,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:19:30,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:19:30,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:19:30,840 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (1/1) ... [2023-08-03 20:19:30,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:19:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:30,871 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 20:19:30,889 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 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:19:30,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:19:30,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:19:30,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:19:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:19:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:19:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:19:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:19:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:19:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:19:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:19:30,910 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 20:19:30,993 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:19:30,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:19:31,211 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:19:31,372 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:19:31,373 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 20:19:31,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:19:31 BoogieIcfgContainer [2023-08-03 20:19:31,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:19:31,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:19:31,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:19:31,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:19:31,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:19:30" (1/3) ... [2023-08-03 20:19:31,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a93bb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:19:31, skipping insertion in model container [2023-08-03 20:19:31,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:19:30" (2/3) ... [2023-08-03 20:19:31,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a93bb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:19:31, skipping insertion in model container [2023-08-03 20:19:31,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:19:31" (3/3) ... [2023-08-03 20:19:31,382 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-03 20:19:31,387 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:19:31,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:19:31,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:19:31,394 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:19:31,443 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:19:31,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,562 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-03 20:19:31,563 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:19:31,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-03 20:19:31,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:19:31,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-03 20:19:31,659 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-03 20:19:31,659 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:19:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-03 20:19:31,666 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-03 20:19:35,177 INFO L134 LiptonReduction]: Checked pairs total: 4239 [2023-08-03 20:19:35,178 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-03 20:19:35,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:19:35,209 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;@5581aa9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:19:35,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:19:35,213 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:19:35,213 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-03 20:19:35,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:19:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:19:35,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:35,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1979957239, now seen corresponding path program 1 times [2023-08-03 20:19:35,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:35,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36592501] [2023-08-03 20:19:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:35,466 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 20:19:35,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:35,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36592501] [2023-08-03 20:19:35,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36592501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:35,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:19:35,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:19:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486353791] [2023-08-03 20:19:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:35,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:19:35,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-03 20:19:35,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 20:19:35,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:35,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-03 20:19:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:35,641 INFO L124 PetriNetUnfolderBase]: 401/647 cut-off events. [2023-08-03 20:19:35,641 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-03 20:19:35,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 647 events. 401/647 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2793 event pairs, 142 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 1109. Up to 605 conditions per place. [2023-08-03 20:19:35,649 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 29 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-03 20:19:35,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 158 flow [2023-08-03 20:19:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-03 20:19:35,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2023-08-03 20:19:35,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-03 20:19:35,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-03 20:19:35,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:35,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-03 20:19:35,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 20:19:35,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:19:35,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:19:35,680 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 90 flow. Second operand 3 states and 387 transitions. [2023-08-03 20:19:35,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 158 flow [2023-08-03 20:19:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:19:35,686 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 96 flow [2023-08-03 20:19:35,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-03 20:19:35,690 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-03 20:19:35,690 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 96 flow [2023-08-03 20:19:35,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 20:19:35,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:35,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:19:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:19:35,692 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] === [2023-08-03 20:19:35,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1264758270, now seen corresponding path program 1 times [2023-08-03 20:19:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:35,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445666500] [2023-08-03 20:19:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:19:35,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:19:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:19:35,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:19:35,776 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:19:35,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:19:35,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:19:35,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:19:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:19:35,781 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:19:35,783 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:19:35,783 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:19:35,810 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:19:35,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,902 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-03 20:19:35,903 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:19:35,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-03 20:19:35,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:19:35,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,913 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-03 20:19:35,992 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-03 20:19:35,993 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:19:35,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-03 20:19:36,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-03 20:19:39,645 INFO L134 LiptonReduction]: Checked pairs total: 12504 [2023-08-03 20:19:39,645 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-03 20:19:39,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:19:39,648 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;@5581aa9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:19:39,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:19:39,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:19:39,650 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-03 20:19:39,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:19:39,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:39,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:19:39,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:39,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -936489670, now seen corresponding path program 1 times [2023-08-03 20:19:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835912705] [2023-08-03 20:19:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:39,700 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 20:19:39,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:39,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835912705] [2023-08-03 20:19:39,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835912705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:39,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:19:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:19:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428058976] [2023-08-03 20:19:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:39,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:19:39,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-03 20:19:39,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 20:19:39,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:39,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-03 20:19:39,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:42,076 INFO L124 PetriNetUnfolderBase]: 20561/26474 cut-off events. [2023-08-03 20:19:42,076 INFO L125 PetriNetUnfolderBase]: For 2123/2123 co-relation queries the response was YES. [2023-08-03 20:19:42,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53575 conditions, 26474 events. 20561/26474 cut-off events. For 2123/2123 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 130464 event pairs, 9671 based on Foata normal form. 0/16764 useless extension candidates. Maximal degree in co-relation 20208. Up to 25630 conditions per place. [2023-08-03 20:19:42,258 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 42 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-03 20:19:42,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2023-08-03 20:19:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-03 20:19:42,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866023579849946 [2023-08-03 20:19:42,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-03 20:19:42,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-03 20:19:42,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:42,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-03 20:19:42,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 20:19:42,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:42,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:42,269 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 148 flow. Second operand 3 states and 454 transitions. [2023-08-03 20:19:42,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2023-08-03 20:19:42,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:19:42,276 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 158 flow [2023-08-03 20:19:42,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-03 20:19:42,277 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-03 20:19:42,277 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 158 flow [2023-08-03 20:19:42,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 20:19:42,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:42,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:42,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:19:42,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:42,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:42,279 INFO L85 PathProgramCache]: Analyzing trace with hash -751066006, now seen corresponding path program 1 times [2023-08-03 20:19:42,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:42,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020045854] [2023-08-03 20:19:42,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:42,363 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 20:19:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020045854] [2023-08-03 20:19:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020045854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:42,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:19:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:19:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657329108] [2023-08-03 20:19:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:42,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:42,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:19:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-03 20:19:42,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 20:19:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-03 20:19:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:44,560 INFO L124 PetriNetUnfolderBase]: 20611/26619 cut-off events. [2023-08-03 20:19:44,561 INFO L125 PetriNetUnfolderBase]: For 2009/2009 co-relation queries the response was YES. [2023-08-03 20:19:44,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53780 conditions, 26619 events. 20611/26619 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 133513 event pairs, 9644 based on Foata normal form. 0/16857 useless extension candidates. Maximal degree in co-relation 53740. Up to 25348 conditions per place. [2023-08-03 20:19:44,679 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 49 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-03 20:19:44,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 282 flow [2023-08-03 20:19:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-03 20:19:44,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919614147909968 [2023-08-03 20:19:44,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-03 20:19:44,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-03 20:19:44,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:44,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-03 20:19:44,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 20:19:44,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:44,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:44,685 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 158 flow. Second operand 3 states and 459 transitions. [2023-08-03 20:19:44,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 282 flow [2023-08-03 20:19:44,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:19:44,691 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 168 flow [2023-08-03 20:19:44,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-03 20:19:44,693 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-03 20:19:44,695 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 168 flow [2023-08-03 20:19:44,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 20:19:44,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:44,696 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:19:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:19:44,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:44,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash 449464461, now seen corresponding path program 1 times [2023-08-03 20:19:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93993280] [2023-08-03 20:19:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:44,803 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 20:19:44,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93993280] [2023-08-03 20:19:44,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93993280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508485938] [2023-08-03 20:19:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:44,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:44,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:44,808 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 20:19:44,833 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 20:19:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:44,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:19:44,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:44,953 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 20:19:44,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:19:44,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508485938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:44,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:19:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:19:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631948481] [2023-08-03 20:19:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:44,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:44,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:19:44,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:44,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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 20:19:44,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:44,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:44,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:46,840 INFO L124 PetriNetUnfolderBase]: 20465/26514 cut-off events. [2023-08-03 20:19:46,840 INFO L125 PetriNetUnfolderBase]: For 2563/2563 co-relation queries the response was YES. [2023-08-03 20:19:46,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54314 conditions, 26514 events. 20465/26514 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 132607 event pairs, 6449 based on Foata normal form. 16/17277 useless extension candidates. Maximal degree in co-relation 20409. Up to 25454 conditions per place. [2023-08-03 20:19:46,966 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 48 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-03 20:19:46,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 293 flow [2023-08-03 20:19:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:19:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:19:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-03 20:19:46,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467524115755627 [2023-08-03 20:19:46,969 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-03 20:19:46,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-03 20:19:46,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:46,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-03 20:19:46,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 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 20:19:46,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:19:46,978 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:19:46,978 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 168 flow. Second operand 5 states and 727 transitions. [2023-08-03 20:19:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 293 flow [2023-08-03 20:19:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 284 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:19:46,986 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 177 flow [2023-08-03 20:19:46,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-03 20:19:46,988 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2023-08-03 20:19:46,988 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 177 flow [2023-08-03 20:19:46,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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 20:19:46,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:46,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:46,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 20:19:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:47,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:47,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:47,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1094482419, now seen corresponding path program 1 times [2023-08-03 20:19:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:47,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237437893] [2023-08-03 20:19:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:47,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:47,261 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 20:19:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237437893] [2023-08-03 20:19:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237437893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:47,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511677643] [2023-08-03 20:19:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:47,265 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 20:19:47,271 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 20:19:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:47,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:19:47,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:47,347 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 20:19:47,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:19:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511677643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:47,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:19:47,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:19:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020183531] [2023-08-03 20:19:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:47,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-03 20:19:47,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 20:19:47,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:47,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-03 20:19:47,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:48,778 INFO L124 PetriNetUnfolderBase]: 16621/21874 cut-off events. [2023-08-03 20:19:48,778 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2023-08-03 20:19:48,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 21874 events. 16621/21874 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 111811 event pairs, 6712 based on Foata normal form. 0/14573 useless extension candidates. Maximal degree in co-relation 12844. Up to 15093 conditions per place. [2023-08-03 20:19:48,865 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 58 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-03 20:19:48,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 343 flow [2023-08-03 20:19:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-03 20:19:48,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4994640943193998 [2023-08-03 20:19:48,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-03 20:19:48,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-03 20:19:48,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:48,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-03 20:19:48,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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 20:19:48,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:48,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:48,879 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 177 flow. Second operand 3 states and 466 transitions. [2023-08-03 20:19:48,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 343 flow [2023-08-03 20:19:48,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 336 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:19:48,884 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 182 flow [2023-08-03 20:19:48,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-03 20:19:48,887 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-08-03 20:19:48,887 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 182 flow [2023-08-03 20:19:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 20:19:48,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:48,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:48,896 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 20:19:49,093 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,SelfDestructingSolverStorable5 [2023-08-03 20:19:49,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:49,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2080305056, now seen corresponding path program 1 times [2023-08-03 20:19:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:49,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663310647] [2023-08-03 20:19:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:49,153 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 20:19:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663310647] [2023-08-03 20:19:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663310647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843917908] [2023-08-03 20:19:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:49,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:49,155 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 20:19:49,159 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 20:19:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:49,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:19:49,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:49,260 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 20:19:49,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:19:49,284 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 20:19:49,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843917908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:19:49,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:19:49,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:19:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731250948] [2023-08-03 20:19:49,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:19:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:49,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:49,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 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 20:19:49,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:49,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:49,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:50,625 INFO L124 PetriNetUnfolderBase]: 15193/19889 cut-off events. [2023-08-03 20:19:50,626 INFO L125 PetriNetUnfolderBase]: For 3166/3166 co-relation queries the response was YES. [2023-08-03 20:19:50,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42071 conditions, 19889 events. 15193/19889 cut-off events. For 3166/3166 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 98398 event pairs, 4834 based on Foata normal form. 4/13494 useless extension candidates. Maximal degree in co-relation 17882. Up to 19106 conditions per place. [2023-08-03 20:19:50,708 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 49 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-03 20:19:50,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 300 flow [2023-08-03 20:19:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:19:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:19:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-03 20:19:50,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47508038585209006 [2023-08-03 20:19:50,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-03 20:19:50,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-03 20:19:50,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:50,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-03 20:19:50,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 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 20:19:50,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:50,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:50,717 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 182 flow. Second operand 4 states and 591 transitions. [2023-08-03 20:19:50,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 300 flow [2023-08-03 20:19:50,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:19:50,754 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 178 flow [2023-08-03 20:19:50,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-03 20:19:50,755 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-08-03 20:19:50,755 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 178 flow [2023-08-03 20:19:50,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 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 20:19:50,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:50,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:19:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:50,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:50,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1321982769, now seen corresponding path program 1 times [2023-08-03 20:19:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:50,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883114628] [2023-08-03 20:19:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:50,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:51,038 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 20:19:51,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:51,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883114628] [2023-08-03 20:19:51,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883114628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:51,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822009978] [2023-08-03 20:19:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:51,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:51,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:51,040 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 20:19:51,043 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 20:19:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:51,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:19:51,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:51,154 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 20:19:51,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:19:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822009978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:51,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:19:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:19:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974983567] [2023-08-03 20:19:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:19:51,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:51,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 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 20:19:51,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:51,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:51,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:52,490 INFO L124 PetriNetUnfolderBase]: 14013/18358 cut-off events. [2023-08-03 20:19:52,490 INFO L125 PetriNetUnfolderBase]: For 1886/1886 co-relation queries the response was YES. [2023-08-03 20:19:52,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38717 conditions, 18358 events. 14013/18358 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 91150 event pairs, 636 based on Foata normal form. 256/12702 useless extension candidates. Maximal degree in co-relation 13609. Up to 15666 conditions per place. [2023-08-03 20:19:52,565 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 67 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-03 20:19:52,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 376 flow [2023-08-03 20:19:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:19:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:19:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-03 20:19:52,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790996784565916 [2023-08-03 20:19:52,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-03 20:19:52,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-03 20:19:52,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:52,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-03 20:19:52,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 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 20:19:52,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:19:52,572 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:19:52,572 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 178 flow. Second operand 5 states and 745 transitions. [2023-08-03 20:19:52,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 376 flow [2023-08-03 20:19:52,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 364 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:19:52,591 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 183 flow [2023-08-03 20:19:52,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-03 20:19:52,592 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-08-03 20:19:52,592 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 183 flow [2023-08-03 20:19:52,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 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 20:19:52,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:52,592 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, 1] [2023-08-03 20:19:52,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 20:19:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:52,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:52,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash 636709799, now seen corresponding path program 1 times [2023-08-03 20:19:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721679895] [2023-08-03 20:19:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:52,850 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 20:19:52,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721679895] [2023-08-03 20:19:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721679895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:52,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623533244] [2023-08-03 20:19:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:52,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:52,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:52,852 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 20:19:52,855 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 20:19:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:52,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:19:52,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:52,946 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 20:19:52,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:19:52,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623533244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:52,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:19:52,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:19:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392992409] [2023-08-03 20:19:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:52,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-03 20:19:52,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 20:19:52,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:52,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-03 20:19:52,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:53,995 INFO L124 PetriNetUnfolderBase]: 13428/17809 cut-off events. [2023-08-03 20:19:53,995 INFO L125 PetriNetUnfolderBase]: For 4012/4012 co-relation queries the response was YES. [2023-08-03 20:19:54,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38211 conditions, 17809 events. 13428/17809 cut-off events. For 4012/4012 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 89599 event pairs, 6252 based on Foata normal form. 0/12349 useless extension candidates. Maximal degree in co-relation 13680. Up to 13447 conditions per place. [2023-08-03 20:19:54,075 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 59 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-03 20:19:54,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 349 flow [2023-08-03 20:19:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:19:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:19:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-03 20:19:54,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4994640943193998 [2023-08-03 20:19:54,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-03 20:19:54,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-03 20:19:54,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:54,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-03 20:19:54,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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 20:19:54,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:54,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:19:54,080 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 183 flow. Second operand 3 states and 466 transitions. [2023-08-03 20:19:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 349 flow [2023-08-03 20:19:54,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 342 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:19:54,090 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 188 flow [2023-08-03 20:19:54,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-03 20:19:54,091 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-03 20:19:54,091 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 188 flow [2023-08-03 20:19:54,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 20:19:54,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:54,092 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:19:54,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 20:19:54,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:54,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:54,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 105558163, now seen corresponding path program 1 times [2023-08-03 20:19:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990073992] [2023-08-03 20:19:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:54,342 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 20:19:54,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990073992] [2023-08-03 20:19:54,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990073992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292481997] [2023-08-03 20:19:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:54,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:54,345 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 20:19:54,370 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 20:19:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:54,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:19:54,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:54,456 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 20:19:54,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:19:54,474 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 20:19:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292481997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:19:54,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:19:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:19:54,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177870337] [2023-08-03 20:19:54,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:19:54,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:54,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:54,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 20:19:54,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:54,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:54,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:55,703 INFO L124 PetriNetUnfolderBase]: 12884/17061 cut-off events. [2023-08-03 20:19:55,703 INFO L125 PetriNetUnfolderBase]: For 3161/3161 co-relation queries the response was YES. [2023-08-03 20:19:55,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36973 conditions, 17061 events. 12884/17061 cut-off events. For 3161/3161 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 86953 event pairs, 3951 based on Foata normal form. 64/11990 useless extension candidates. Maximal degree in co-relation 25808. Up to 14457 conditions per place. [2023-08-03 20:19:55,798 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 62 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-03 20:19:55,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 356 flow [2023-08-03 20:19:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:19:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:19:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-08-03 20:19:55,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847266881028939 [2023-08-03 20:19:55,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-08-03 20:19:55,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-08-03 20:19:55,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:55,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-08-03 20:19:55,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 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 20:19:55,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:55,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:55,805 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 188 flow. Second operand 4 states and 603 transitions. [2023-08-03 20:19:55,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 356 flow [2023-08-03 20:19:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:19:55,889 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 184 flow [2023-08-03 20:19:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-08-03 20:19:55,890 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-03 20:19:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 184 flow [2023-08-03 20:19:55,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 20:19:55,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:55,890 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] [2023-08-03 20:19:55,895 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 20:19:56,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:56,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:56,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1519969545, now seen corresponding path program 1 times [2023-08-03 20:19:56,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:56,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613545161] [2023-08-03 20:19:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:56,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:56,151 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 20:19:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613545161] [2023-08-03 20:19:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613545161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916059616] [2023-08-03 20:19:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:56,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:56,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:56,153 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 20:19:56,156 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 20:19:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:56,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:19:56,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:56,265 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 20:19:56,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:19:56,281 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 20:19:56,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916059616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:19:56,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:19:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:19:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181040694] [2023-08-03 20:19:56,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:19:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:56,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:56,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 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 20:19:56,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:56,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:56,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:57,298 INFO L124 PetriNetUnfolderBase]: 9736/12905 cut-off events. [2023-08-03 20:19:57,298 INFO L125 PetriNetUnfolderBase]: For 3576/3576 co-relation queries the response was YES. [2023-08-03 20:19:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28012 conditions, 12905 events. 9736/12905 cut-off events. For 3576/3576 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60779 event pairs, 2097 based on Foata normal form. 256/9250 useless extension candidates. Maximal degree in co-relation 25824. Up to 4752 conditions per place. [2023-08-03 20:19:57,358 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 69 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-03 20:19:57,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 398 flow [2023-08-03 20:19:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:19:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:19:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-03 20:19:57,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49115755627009644 [2023-08-03 20:19:57,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-03 20:19:57,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-03 20:19:57,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:57,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-03 20:19:57,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 20:19:57,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:57,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:57,365 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 184 flow. Second operand 4 states and 611 transitions. [2023-08-03 20:19:57,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 398 flow [2023-08-03 20:19:57,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 392 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:19:57,389 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 198 flow [2023-08-03 20:19:57,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-08-03 20:19:57,390 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2023-08-03 20:19:57,390 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 198 flow [2023-08-03 20:19:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 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 20:19:57,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:57,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2023-08-03 20:19:57,397 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 20:19:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:57,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:57,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 424578443, now seen corresponding path program 1 times [2023-08-03 20:19:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518331062] [2023-08-03 20:19:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:19:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518331062] [2023-08-03 20:19:57,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518331062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:19:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141877198] [2023-08-03 20:19:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:19:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:19:57,656 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 20:19:57,658 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 20:19:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:57,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:19:57,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:19:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:19:57,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:19:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:19:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141877198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:19:57,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:19:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:19:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26457669] [2023-08-03 20:19:57,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:19:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:19:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:19:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:19:57,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:57,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 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 20:19:57,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:19:58,688 INFO L124 PetriNetUnfolderBase]: 9716/12870 cut-off events. [2023-08-03 20:19:58,688 INFO L125 PetriNetUnfolderBase]: For 5569/5569 co-relation queries the response was YES. [2023-08-03 20:19:58,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29516 conditions, 12870 events. 9716/12870 cut-off events. For 5569/5569 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60325 event pairs, 5425 based on Foata normal form. 17/8984 useless extension candidates. Maximal degree in co-relation 27300. Up to 11417 conditions per place. [2023-08-03 20:19:58,750 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 69 selfloop transitions, 3 changer transitions 2/82 dead transitions. [2023-08-03 20:19:58,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 414 flow [2023-08-03 20:19:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:19:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:19:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-03 20:19:58,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49115755627009644 [2023-08-03 20:19:58,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-03 20:19:58,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-03 20:19:58,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:19:58,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-03 20:19:58,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 20:19:58,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:58,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 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 20:19:58,756 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 198 flow. Second operand 4 states and 611 transitions. [2023-08-03 20:19:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 414 flow [2023-08-03 20:19:58,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:19:58,796 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 202 flow [2023-08-03 20:19:58,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-08-03 20:19:58,797 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-03 20:19:58,797 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 202 flow [2023-08-03 20:19:58,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 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 20:19:58,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:19:58,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:19:58,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-03 20:19:59,002 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,SelfDestructingSolverStorable11 [2023-08-03 20:19:59,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:19:59,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:19:59,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1929568338, now seen corresponding path program 1 times [2023-08-03 20:19:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:19:59,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584605301] [2023-08-03 20:19:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:19:59,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:19:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:19:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:19:59,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:19:59,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584605301] [2023-08-03 20:19:59,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584605301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:19:59,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:19:59,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 20:19:59,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815338812] [2023-08-03 20:19:59,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:19:59,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:19:59,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:19:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:19:59,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:19:59,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-03 20:19:59,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 20:19:59,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:19:59,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-03 20:19:59,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:00,114 INFO L124 PetriNetUnfolderBase]: 12781/16588 cut-off events. [2023-08-03 20:20:00,114 INFO L125 PetriNetUnfolderBase]: For 9165/9165 co-relation queries the response was YES. [2023-08-03 20:20:00,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38687 conditions, 16588 events. 12781/16588 cut-off events. For 9165/9165 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 82915 event pairs, 2086 based on Foata normal form. 1/11588 useless extension candidates. Maximal degree in co-relation 38311. Up to 13221 conditions per place. [2023-08-03 20:20:00,194 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 75 selfloop transitions, 5 changer transitions 1/89 dead transitions. [2023-08-03 20:20:00,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 531 flow [2023-08-03 20:20:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:20:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:20:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-03 20:20:00,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133976420150054 [2023-08-03 20:20:00,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-03 20:20:00,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-03 20:20:00,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:00,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-03 20:20:00,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 20:20:00,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:20:00,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 20:20:00,199 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 202 flow. Second operand 3 states and 479 transitions. [2023-08-03 20:20:00,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 531 flow [2023-08-03 20:20:00,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 515 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:20:00,232 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 227 flow [2023-08-03 20:20:00,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-08-03 20:20:00,233 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-03 20:20:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 227 flow [2023-08-03 20:20:00,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 20:20:00,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:00,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 20:20:00,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:00,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:00,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2112239154, now seen corresponding path program 1 times [2023-08-03 20:20:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930892039] [2023-08-03 20:20:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:20:00,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:00,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930892039] [2023-08-03 20:20:00,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930892039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:20:00,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:20:00,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 20:20:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853181606] [2023-08-03 20:20:00,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:00,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:20:00,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 311 [2023-08-03 20:20:00,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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 20:20:00,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:00,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 311 [2023-08-03 20:20:00,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:02,236 INFO L124 PetriNetUnfolderBase]: 22735/30648 cut-off events. [2023-08-03 20:20:02,237 INFO L125 PetriNetUnfolderBase]: For 15502/15502 co-relation queries the response was YES. [2023-08-03 20:20:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 30648 events. 22735/30648 cut-off events. For 15502/15502 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 173704 event pairs, 9944 based on Foata normal form. 0/22788 useless extension candidates. Maximal degree in co-relation 77124. Up to 16723 conditions per place. [2023-08-03 20:20:02,415 INFO L140 encePairwiseOnDemand]: 306/311 looper letters, 114 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2023-08-03 20:20:02,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 125 transitions, 774 flow [2023-08-03 20:20:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 20:20:02,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855305466237942 [2023-08-03 20:20:02,417 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 20:20:02,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 20:20:02,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:02,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 20:20:02,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 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 20:20:02,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:02,421 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:02,421 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 227 flow. Second operand 5 states and 755 transitions. [2023-08-03 20:20:02,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 125 transitions, 774 flow [2023-08-03 20:20:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 125 transitions, 763 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:20:02,582 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 252 flow [2023-08-03 20:20:02,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-08-03 20:20:02,583 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2023-08-03 20:20:02,583 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 252 flow [2023-08-03 20:20:02,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 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 20:20:02,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:20:02,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:02,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -267872878, now seen corresponding path program 1 times [2023-08-03 20:20:02,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103836454] [2023-08-03 20:20:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:20:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103836454] [2023-08-03 20:20:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103836454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:20:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:20:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 20:20:02,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401076838] [2023-08-03 20:20:02,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:20:02,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 311 [2023-08-03 20:20:02,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:02,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:02,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 311 [2023-08-03 20:20:02,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:04,340 INFO L124 PetriNetUnfolderBase]: 17893/24821 cut-off events. [2023-08-03 20:20:04,341 INFO L125 PetriNetUnfolderBase]: For 12852/13400 co-relation queries the response was YES. [2023-08-03 20:20:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62584 conditions, 24821 events. 17893/24821 cut-off events. For 12852/13400 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 142935 event pairs, 11194 based on Foata normal form. 548/20704 useless extension candidates. Maximal degree in co-relation 61882. Up to 16436 conditions per place. [2023-08-03 20:20:04,452 INFO L140 encePairwiseOnDemand]: 306/311 looper letters, 117 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-03 20:20:04,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 129 transitions, 818 flow [2023-08-03 20:20:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-03 20:20:04,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487459807073955 [2023-08-03 20:20:04,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-03 20:20:04,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-03 20:20:04,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:04,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-03 20:20:04,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 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 20:20:04,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:04,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:04,458 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 252 flow. Second operand 5 states and 758 transitions. [2023-08-03 20:20:04,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 129 transitions, 818 flow [2023-08-03 20:20:04,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 814 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:20:04,573 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 265 flow [2023-08-03 20:20:04,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2023-08-03 20:20:04,574 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2023-08-03 20:20:04,574 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 265 flow [2023-08-03 20:20:04,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:04,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:04,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:04,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 20:20:04,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:04,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1967316624, now seen corresponding path program 1 times [2023-08-03 20:20:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:04,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498812005] [2023-08-03 20:20:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:20:04,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498812005] [2023-08-03 20:20:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498812005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:20:04,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:20:04,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 20:20:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007331499] [2023-08-03 20:20:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:04,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:04,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:20:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 311 [2023-08-03 20:20:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 311 [2023-08-03 20:20:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:06,102 INFO L124 PetriNetUnfolderBase]: 15000/20936 cut-off events. [2023-08-03 20:20:06,102 INFO L125 PetriNetUnfolderBase]: For 12445/13179 co-relation queries the response was YES. [2023-08-03 20:20:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54381 conditions, 20936 events. 15000/20936 cut-off events. For 12445/13179 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 119435 event pairs, 9419 based on Foata normal form. 734/19346 useless extension candidates. Maximal degree in co-relation 53735. Up to 16442 conditions per place. [2023-08-03 20:20:06,251 INFO L140 encePairwiseOnDemand]: 306/311 looper letters, 108 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-03 20:20:06,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 782 flow [2023-08-03 20:20:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-03 20:20:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48360128617363346 [2023-08-03 20:20:06,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-03 20:20:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-03 20:20:06,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:06,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-03 20:20:06,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 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 20:20:06,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:06,258 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:06,258 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 265 flow. Second operand 5 states and 752 transitions. [2023-08-03 20:20:06,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 782 flow [2023-08-03 20:20:06,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 121 transitions, 777 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:20:06,360 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 277 flow [2023-08-03 20:20:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-08-03 20:20:06,361 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-03 20:20:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 277 flow [2023-08-03 20:20:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 20:20:06,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:06,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 975783067, now seen corresponding path program 1 times [2023-08-03 20:20:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115432787] [2023-08-03 20:20:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:20:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115432787] [2023-08-03 20:20:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115432787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:20:06,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:20:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 20:20:06,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544450262] [2023-08-03 20:20:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:06,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:06,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:20:06,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 311 [2023-08-03 20:20:06,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:06,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:06,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 311 [2023-08-03 20:20:06,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:07,805 INFO L124 PetriNetUnfolderBase]: 13428/18447 cut-off events. [2023-08-03 20:20:07,805 INFO L125 PetriNetUnfolderBase]: For 12788/13213 co-relation queries the response was YES. [2023-08-03 20:20:07,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49500 conditions, 18447 events. 13428/18447 cut-off events. For 12788/13213 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 100141 event pairs, 8116 based on Foata normal form. 425/18134 useless extension candidates. Maximal degree in co-relation 48982. Up to 16452 conditions per place. [2023-08-03 20:20:07,919 INFO L140 encePairwiseOnDemand]: 306/311 looper letters, 47 selfloop transitions, 2 changer transitions 56/112 dead transitions. [2023-08-03 20:20:07,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 112 transitions, 723 flow [2023-08-03 20:20:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 744 transitions. [2023-08-03 20:20:07,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47845659163987136 [2023-08-03 20:20:07,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 744 transitions. [2023-08-03 20:20:07,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 744 transitions. [2023-08-03 20:20:07,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:07,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 744 transitions. [2023-08-03 20:20:07,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 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 20:20:07,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:07,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:07,926 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 277 flow. Second operand 5 states and 744 transitions. [2023-08-03 20:20:07,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 112 transitions, 723 flow [2023-08-03 20:20:07,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 718 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:20:07,996 INFO L231 Difference]: Finished difference. Result has 83 places, 56 transitions, 250 flow [2023-08-03 20:20:07,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=83, PETRI_TRANSITIONS=56} [2023-08-03 20:20:07,996 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2023-08-03 20:20:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 56 transitions, 250 flow [2023-08-03 20:20:07,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 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 20:20:07,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:07,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-03 20:20:07,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:07,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1089326079, now seen corresponding path program 1 times [2023-08-03 20:20:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:07,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647900841] [2023-08-03 20:20:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:20:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647900841] [2023-08-03 20:20:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647900841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64276273] [2023-08-03 20:20:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:08,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:20:08,142 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 20:20:08,144 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 20:20:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:08,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:20:08,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:20:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:20:08,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:20:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:20:08,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64276273] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:08,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 20:20:08,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-03 20:20:08,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612489231] [2023-08-03 20:20:08,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:08,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:20:08,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 311 [2023-08-03 20:20:08,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 56 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 20:20:08,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:08,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 311 [2023-08-03 20:20:08,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:09,662 INFO L124 PetriNetUnfolderBase]: 13428/17849 cut-off events. [2023-08-03 20:20:09,662 INFO L125 PetriNetUnfolderBase]: For 14143/14143 co-relation queries the response was YES. [2023-08-03 20:20:09,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50161 conditions, 17849 events. 13428/17849 cut-off events. For 14143/14143 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 88519 event pairs, 5383 based on Foata normal form. 771/18620 useless extension candidates. Maximal degree in co-relation 50128. Up to 9559 conditions per place. [2023-08-03 20:20:09,765 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 76 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-03 20:20:09,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 569 flow [2023-08-03 20:20:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-03 20:20:09,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565916398713826 [2023-08-03 20:20:09,767 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-03 20:20:09,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-03 20:20:09,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:09,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-03 20:20:09,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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 20:20:09,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:09,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:09,771 INFO L175 Difference]: Start difference. First operand has 83 places, 56 transitions, 250 flow. Second operand 5 states and 710 transitions. [2023-08-03 20:20:09,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 569 flow [2023-08-03 20:20:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 541 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-03 20:20:09,850 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 257 flow [2023-08-03 20:20:09,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-03 20:20:09,850 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-03 20:20:09,850 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 257 flow [2023-08-03 20:20:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 20:20:09,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:09,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:09,857 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 20:20:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 20:20:10,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:10,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash 915047467, now seen corresponding path program 1 times [2023-08-03 20:20:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:10,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260402160] [2023-08-03 20:20:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:20:10,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:10,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260402160] [2023-08-03 20:20:10,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260402160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:10,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770419395] [2023-08-03 20:20:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:20:10,156 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 20:20:10,160 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 20:20:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:10,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:20:10,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:20:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:20:10,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:20:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:20:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770419395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:20:10,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:20:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-03 20:20:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987416572] [2023-08-03 20:20:10,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:20:10,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:20:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:20:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:20:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 311 [2023-08-03 20:20:10,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 257 flow. Second operand has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 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 20:20:10,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:10,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 311 [2023-08-03 20:20:10,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:11,710 INFO L124 PetriNetUnfolderBase]: 13574/18039 cut-off events. [2023-08-03 20:20:11,710 INFO L125 PetriNetUnfolderBase]: For 18030/19820 co-relation queries the response was YES. [2023-08-03 20:20:11,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50141 conditions, 18039 events. 13574/18039 cut-off events. For 18030/19820 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 89579 event pairs, 5588 based on Foata normal form. 1790/16528 useless extension candidates. Maximal degree in co-relation 50107. Up to 9185 conditions per place. [2023-08-03 20:20:11,824 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 114 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-03 20:20:11,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 128 transitions, 837 flow [2023-08-03 20:20:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 20:20:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 20:20:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 870 transitions. [2023-08-03 20:20:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662379421221865 [2023-08-03 20:20:11,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 870 transitions. [2023-08-03 20:20:11,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 870 transitions. [2023-08-03 20:20:11,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:11,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 870 transitions. [2023-08-03 20:20:11,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:20:11,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 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 20:20:11,829 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 311.0) internal successors, (2177), 7 states have internal predecessors, (2177), 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 20:20:11,829 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 257 flow. Second operand 6 states and 870 transitions. [2023-08-03 20:20:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 128 transitions, 837 flow [2023-08-03 20:20:11,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 128 transitions, 825 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:20:11,882 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 283 flow [2023-08-03 20:20:11,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2023-08-03 20:20:11,882 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2023-08-03 20:20:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 283 flow [2023-08-03 20:20:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 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 20:20:11,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:11,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 20:20:12,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:12,083 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:12,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1683294507, now seen corresponding path program 1 times [2023-08-03 20:20:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:12,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602004335] [2023-08-03 20:20:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:12,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:20:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602004335] [2023-08-03 20:20:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602004335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:12,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173363864] [2023-08-03 20:20:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:20:12,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:20:12,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:20:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:12,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:20:12,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:20:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:20:12,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:20:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-03 20:20:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173363864] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 20:20:12,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-03 20:20:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037613553] [2023-08-03 20:20:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:20:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:20:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:20:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:20:12,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 311 [2023-08-03 20:20:12,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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 20:20:12,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:12,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 311 [2023-08-03 20:20:12,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:13,620 INFO L124 PetriNetUnfolderBase]: 12603/16853 cut-off events. [2023-08-03 20:20:13,620 INFO L125 PetriNetUnfolderBase]: For 24010/27066 co-relation queries the response was YES. [2023-08-03 20:20:13,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51323 conditions, 16853 events. 12603/16853 cut-off events. For 24010/27066 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 84113 event pairs, 4989 based on Foata normal form. 3056/17999 useless extension candidates. Maximal degree in co-relation 51286. Up to 9811 conditions per place. [2023-08-03 20:20:13,741 INFO L140 encePairwiseOnDemand]: 305/311 looper letters, 79 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-03 20:20:13,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 616 flow [2023-08-03 20:20:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:20:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:20:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 707 transitions. [2023-08-03 20:20:13,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45466237942122184 [2023-08-03 20:20:13,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 707 transitions. [2023-08-03 20:20:13,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 707 transitions. [2023-08-03 20:20:13,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:13,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 707 transitions. [2023-08-03 20:20:13,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 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 20:20:13,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:13,746 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 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 20:20:13,746 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 283 flow. Second operand 5 states and 707 transitions. [2023-08-03 20:20:13,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 616 flow [2023-08-03 20:20:13,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 613 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 20:20:13,789 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 307 flow [2023-08-03 20:20:13,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-08-03 20:20:13,789 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2023-08-03 20:20:13,789 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 307 flow [2023-08-03 20:20:13,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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 20:20:13,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:13,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-08-03 20:20:13,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 20:20:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:13,992 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:13,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1104431956, now seen corresponding path program 1 times [2023-08-03 20:20:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927260601] [2023-08-03 20:20:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:20:14,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:20:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927260601] [2023-08-03 20:20:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927260601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:20:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494481477] [2023-08-03 20:20:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:20:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:20:14,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:20:14,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 20:20:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:20:14,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-03 20:20:14,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:20:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:20:14,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:20:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:20:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494481477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:20:14,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:20:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-08-03 20:20:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923653041] [2023-08-03 20:20:14,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:20:14,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 20:20:14,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:20:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 20:20:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-03 20:20:14,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 311 [2023-08-03 20:20:14,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 129.3) internal successors, (1293), 10 states have internal predecessors, (1293), 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 20:20:14,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:20:14,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 311 [2023-08-03 20:20:14,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:20:16,116 INFO L124 PetriNetUnfolderBase]: 15981/21306 cut-off events. [2023-08-03 20:20:16,116 INFO L125 PetriNetUnfolderBase]: For 40198/44246 co-relation queries the response was YES. [2023-08-03 20:20:16,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72805 conditions, 21306 events. 15981/21306 cut-off events. For 40198/44246 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 108279 event pairs, 3957 based on Foata normal form. 4048/24711 useless extension candidates. Maximal degree in co-relation 72765. Up to 8456 conditions per place. [2023-08-03 20:20:16,252 INFO L140 encePairwiseOnDemand]: 303/311 looper letters, 171 selfloop transitions, 20 changer transitions 0/197 dead transitions. [2023-08-03 20:20:16,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 197 transitions, 1418 flow [2023-08-03 20:20:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 20:20:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 20:20:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1274 transitions. [2023-08-03 20:20:16,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45516255805644873 [2023-08-03 20:20:16,255 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1274 transitions. [2023-08-03 20:20:16,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1274 transitions. [2023-08-03 20:20:16,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:20:16,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1274 transitions. [2023-08-03 20:20:16,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.55555555555554) internal successors, (1274), 9 states have internal predecessors, (1274), 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 20:20:16,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 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 20:20:16,260 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 311.0) internal successors, (3110), 10 states have internal predecessors, (3110), 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 20:20:16,260 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 307 flow. Second operand 9 states and 1274 transitions. [2023-08-03 20:20:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 197 transitions, 1418 flow [2023-08-03 20:20:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 197 transitions, 1398 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:20:16,299 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 435 flow [2023-08-03 20:20:16,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=435, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-08-03 20:20:16,300 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2023-08-03 20:20:16,300 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 435 flow [2023-08-03 20:20:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.3) internal successors, (1293), 10 states have internal predecessors, (1293), 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 20:20:16,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:20:16,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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 20:20:16,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 20:20:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-03 20:20:16,501 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:20:16,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:20:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 384544274, now seen corresponding path program 1 times [2023-08-03 20:20:16,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:20:16,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197583313] [2023-08-03 20:20:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:20:16,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:20:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:20:16,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:20:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:20:16,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:20:16,633 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:20:16,634 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 20:20:16,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 20:20:16,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:20:16,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-03 20:20:16,634 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:20:16,637 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 20:20:16,637 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 20:20:16,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 08:20:16 BasicIcfg [2023-08-03 20:20:16,720 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 20:20:16,721 INFO L158 Benchmark]: Toolchain (without parser) took 46235.02ms. Allocated memory was 337.6MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 283.0MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-03 20:20:16,721 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 337.6MB. Free memory is still 287.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 20:20:16,721 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.75ms. Allocated memory is still 337.6MB. Free memory was 282.8MB in the beginning and 271.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 20:20:16,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.61ms. Allocated memory is still 337.6MB. Free memory was 271.0MB in the beginning and 268.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 20:20:16,722 INFO L158 Benchmark]: Boogie Preprocessor took 38.83ms. Allocated memory is still 337.6MB. Free memory was 268.7MB in the beginning and 267.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 20:20:16,722 INFO L158 Benchmark]: RCFGBuilder took 543.14ms. Allocated memory was 337.6MB in the beginning and 488.6MB in the end (delta: 151.0MB). Free memory was 267.2MB in the beginning and 446.1MB in the end (delta: -178.9MB). Peak memory consumption was 26.5MB. Max. memory is 16.0GB. [2023-08-03 20:20:16,722 INFO L158 Benchmark]: TraceAbstraction took 45343.57ms. Allocated memory was 488.6MB in the beginning and 6.2GB in the end (delta: 5.7GB). Free memory was 445.1MB in the beginning and 4.6GB in the end (delta: -4.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-03 20:20:16,723 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 337.6MB. Free memory is still 287.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 247.75ms. Allocated memory is still 337.6MB. Free memory was 282.8MB in the beginning and 271.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.61ms. Allocated memory is still 337.6MB. Free memory was 271.0MB in the beginning and 268.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.83ms. Allocated memory is still 337.6MB. Free memory was 268.7MB in the beginning and 267.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 543.14ms. Allocated memory was 337.6MB in the beginning and 488.6MB in the end (delta: 151.0MB). Free memory was 267.2MB in the beginning and 446.1MB in the end (delta: -178.9MB). Peak memory consumption was 26.5MB. Max. memory is 16.0GB. * TraceAbstraction took 45343.57ms. Allocated memory was 488.6MB in the beginning and 6.2GB in the end (delta: 5.7GB). Free memory was 445.1MB in the beginning and 4.6GB in the end (delta: -4.1GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 129 PlacesBefore, 32 PlacesAfterwards, 141 TransitionsBefore, 34 TransitionsAfterwards, 2662 CoEnabledTransitionPairs, 7 FixpointIterations, 48 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 14 ConcurrentYvCompositions, 10 ChoiceCompositions, 127 TotalNumberOfCompositions, 4239 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3476, independent: 3412, independent conditional: 0, independent unconditional: 3412, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1424, independent: 1406, independent conditional: 0, independent unconditional: 1406, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3476, independent: 2006, independent conditional: 0, independent unconditional: 2006, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 1424, unknown conditional: 0, unknown unconditional: 1424] , Statistics on independence cache: Total cache size (in pairs): 121, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 153 PlacesBefore, 46 PlacesAfterwards, 169 TransitionsBefore, 50 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 18 ConcurrentYvCompositions, 12 ChoiceCompositions, 142 TotalNumberOfCompositions, 12504 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10180, independent: 10076, independent conditional: 0, independent unconditional: 10076, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3496, independent: 3468, independent conditional: 0, independent unconditional: 3468, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10180, independent: 6608, independent conditional: 0, independent unconditional: 6608, dependent: 76, dependent conditional: 0, dependent unconditional: 76, unknown: 3496, unknown conditional: 0, unknown unconditional: 3496] , Statistics on independence cache: Total cache size (in pairs): 331, Positive cache size: 322, Positive conditional cache size: 0, Positive unconditional cache size: 322, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1[2], t2[2]; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={9:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={9:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] 0 int asdf=0; VAL [A={9:0}, N=1, asdf=0, counter=0, t1={12:0}, t2={11:0}] [L81] COND TRUE 0 asdf<2 [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={9:0}, N=1, asdf=0, counter=0, pthread_create(&t1[asdf], 0, thread1, 0)=15, t1={12:0}, t2={11:0}] [L81] 0 asdf++ VAL [A={9:0}, N=1, asdf=1, counter=0, t1={12:0}, t2={11:0}] [L81] COND TRUE 0 asdf<2 [L49] 1 int i=0; VAL [A={9:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={9:0}, N=1, counter=7, i=1, tmp=7] [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={9:0}, N=1, asdf=1, counter=7, pthread_create(&t1[asdf], 0, thread1, 0)=16, t1={12:0}, t2={11:0}] [L81] 0 asdf++ VAL [A={9:0}, N=1, asdf=2, counter=7, t1={12:0}, t2={11:0}] [L49] COND FALSE 1 !(i= 0 || a >= -2147483648 - b) [L38] COND FALSE 2 !(!cond) [L110] RET 2 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 2 !(!cond) [L111] RET 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 2 return a + b; [L51] RET, EXPR 2 plus(counter, A[i]) [L51] 2 int tmp = plus(counter, A[i]); [L81] COND FALSE 0 !(asdf<2) [L82] 0 int asdf=0; VAL [A={9:0}, N=1, asdf=0, asdf=2, counter=7, t1={12:0}, t2={11:0}] [L82] COND TRUE 0 asdf<2 [L82] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [A={9:0}, N=1, asdf=0, asdf=2, counter=7, pthread_create(&t2[asdf], 0, thread2, 0)=17, t1={12:0}, t2={11:0}] [L62] 3 int i=0; VAL [A={9:0}, N=1, counter=7, i=0] [L62] COND TRUE 3 i= b - 2147483648) [L38] COND FALSE 3 !(!cond) [L104] RET 3 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 3 !(!cond) [L105] RET 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 3 return a - b; [L64] RET, EXPR 3 minus(counter, A[i]) [L64] 3 int tmp = minus(counter, A[i]); [L54] 2 counter = tmp [L49] 2 i++ VAL [A={9:0}, N=1, \result={0:0}, counter=14, i=1, tmp=7] [L49] COND FALSE 2 !(i= b - 2147483648) [L38] COND FALSE 4 !(!cond) [L104] RET 4 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 4 !(!cond) [L105] RET 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 4 return a - b; [L64] RET, EXPR 4 minus(counter, A[i]) [L64] 4 int tmp = minus(counter, A[i]); [L83] 0 asdf++ VAL [A={9:0}, N=1, asdf=1, asdf=2, asdf=2, counter=0, t1={12:0}, t2={11:0}] [L67] 4 counter = tmp [L62] 4 i++ VAL [A={9:0}, N=1, \result={0:0}, counter=-7, i=1, tmp=0] [L83] COND TRUE 0 asdf<2 [L83] 0 t1[asdf] VAL [A={9:0}, N=1, asdf=1, asdf=2, asdf=2, counter=-7, t1={12:0}, t1[asdf]=16, t2={11:0}] [L62] COND FALSE 4 !(i