/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:43:26,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:43:26,629 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:43:26,636 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:43:26,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:43:26,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:43:26,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:43:26,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:43:26,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:43:26,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:43:26,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:43:26,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:43:26,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:43:26,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:43:26,675 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:43:26,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:43:26,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:43:26,677 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:43:26,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:43:26,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:43:26,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:43:26,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:43:26,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:43:26,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:43:26,678 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:43:26,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:43:26,680 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:43:26,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:43:26,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:43:26,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:43:26,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:43:26,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:43:26,682 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:43:26,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:43:26,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:43:26,683 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:43:26,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:43:26,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:43:26,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:43:26,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:43:26,917 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:43:26,917 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:43:26,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-03 20:43:28,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:43:28,173 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:43:28,174 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-03 20:43:28,182 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c86ab3b7/9437153b171a4979b9136433aa494a07/FLAG9898f93cd [2023-08-03 20:43:28,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c86ab3b7/9437153b171a4979b9136433aa494a07 [2023-08-03 20:43:28,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:43:28,215 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:43:28,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:43:28,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:43:28,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:43:28,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3205ae15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28, skipping insertion in model container [2023-08-03 20:43:28,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,252 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:43:28,443 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-03 20:43:28,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:43:28,463 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:43:28,501 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-03 20:43:28,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:43:28,516 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:43:28,516 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:43:28,522 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:43:28,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28 WrapperNode [2023-08-03 20:43:28,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:43:28,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:43:28,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:43:28,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:43:28,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,590 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 232 [2023-08-03 20:43:28,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:43:28,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:43:28,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:43:28,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:43:28,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,617 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:43:28,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:43:28,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:43:28,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:43:28,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (1/1) ... [2023-08-03 20:43:28,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:43:28,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:43:28,674 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 20:43:28,688 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 20:43:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:43:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:43:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:43:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:43:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:43:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:43:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:43:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:43:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 20:43:28,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 20:43:28,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:43:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:43:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:43:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:43:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:43:28,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:43:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:43:28,721 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 20:43:28,821 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:43:28,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:43:29,128 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:43:29,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:43:29,264 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-03 20:43:29,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:43:29 BoogieIcfgContainer [2023-08-03 20:43:29,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:43:29,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:43:29,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:43:29,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:43:29,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:43:28" (1/3) ... [2023-08-03 20:43:29,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7fb305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:43:29, skipping insertion in model container [2023-08-03 20:43:29,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:43:28" (2/3) ... [2023-08-03 20:43:29,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7fb305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:43:29, skipping insertion in model container [2023-08-03 20:43:29,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:43:29" (3/3) ... [2023-08-03 20:43:29,274 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-03 20:43:29,280 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:43:29,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:43:29,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:43:29,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:43:29,345 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 20:43:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,545 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-03 20:43:29,545 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:43:29,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-03 20:43:29,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:43:29,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-03 20:43:29,664 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-03 20:43:29,664 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 20:43:29,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-03 20:43:29,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-03 20:43:34,557 INFO L134 LiptonReduction]: Checked pairs total: 11406 [2023-08-03 20:43:34,557 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-03 20:43:34,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:43:34,575 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;@688ec517, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:43:34,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:43:34,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:43:34,579 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-03 20:43:34,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:43:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:34,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:43:34,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:34,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1986514109, now seen corresponding path program 1 times [2023-08-03 20:43:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:34,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718367472] [2023-08-03 20:43:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:43:34,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:43:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:43:34,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:43:34,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:43:34,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 20:43:34,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 20:43:34,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 20:43:34,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 20:43:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:43:34,746 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 20:43:34,751 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:43:34,751 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:43:34,790 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 20:43:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,408 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-03 20:43:35,409 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:43:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-03 20:43:35,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,455 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:43:35,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-03 20:43:35,948 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-03 20:43:35,948 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-03 20:43:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-03 20:43:36,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 14832 [2023-08-03 20:43:40,844 INFO L134 LiptonReduction]: Checked pairs total: 35771 [2023-08-03 20:43:40,844 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-03 20:43:40,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:43:40,847 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;@688ec517, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:43:40,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 20:43:40,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:43:40,850 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-03 20:43:40,850 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 20:43:40,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:43:40,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:43:40,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:43:40,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:43:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2022968105, now seen corresponding path program 1 times [2023-08-03 20:43:40,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:43:40,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767501777] [2023-08-03 20:43:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:43:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:43:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:43:40,947 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 20:43:40,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:43:40,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767501777] [2023-08-03 20:43:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767501777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:43:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:43:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:43:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027093361] [2023-08-03 20:43:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:43:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:43:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:43:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:43:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:43:40,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:43:41,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 20:43:41,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:43:41,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:43:41,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:43:59,549 INFO L124 PetriNetUnfolderBase]: 195308/264025 cut-off events. [2023-08-03 20:43:59,549 INFO L125 PetriNetUnfolderBase]: For 34680/34680 co-relation queries the response was YES. [2023-08-03 20:44:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525626 conditions, 264025 events. 195308/264025 cut-off events. For 34680/34680 co-relation queries the response was YES. Maximal size of possible extension queue 6058. Compared 1812764 event pairs, 110902 based on Foata normal form. 0/201405 useless extension candidates. Maximal degree in co-relation 172137. Up to 240499 conditions per place. [2023-08-03 20:44:01,335 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 64 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-03 20:44:01,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 380 flow [2023-08-03 20:44:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:44:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:44:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-03 20:44:01,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980665119876257 [2023-08-03 20:44:01,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-03 20:44:01,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-03 20:44:01,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:01,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-03 20:44:01,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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 20:44:01,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:01,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:01,364 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 3 states and 644 transitions. [2023-08-03 20:44:01,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 380 flow [2023-08-03 20:44:01,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:44:01,411 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 250 flow [2023-08-03 20:44:01,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-03 20:44:01,416 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-03 20:44:01,416 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 250 flow [2023-08-03 20:44:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 20:44:01,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:01,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:44:01,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:44:01,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:01,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash -659892015, now seen corresponding path program 1 times [2023-08-03 20:44:01,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:01,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408923585] [2023-08-03 20:44:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:01,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:01,496 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 20:44:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408923585] [2023-08-03 20:44:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408923585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877954661] [2023-08-03 20:44:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:01,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:01,500 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 20:44:01,512 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 20:44:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:01,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:44:01,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:01,648 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 20:44:01,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:44:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877954661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:44:01,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:44:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:44:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705743566] [2023-08-03 20:44:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:44:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:44:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:44:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:44:01,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-03 20:44:01,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 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 20:44:01,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:01,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-03 20:44:01,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:18,768 INFO L124 PetriNetUnfolderBase]: 195290/263998 cut-off events. [2023-08-03 20:44:18,769 INFO L125 PetriNetUnfolderBase]: For 34672/34672 co-relation queries the response was YES. [2023-08-03 20:44:19,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525596 conditions, 263998 events. 195290/263998 cut-off events. For 34672/34672 co-relation queries the response was YES. Maximal size of possible extension queue 6058. Compared 1812816 event pairs, 88676 based on Foata normal form. 9/201478 useless extension candidates. Maximal degree in co-relation 225648. Up to 240436 conditions per place. [2023-08-03 20:44:20,335 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 69 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-03 20:44:20,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 414 flow [2023-08-03 20:44:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:44:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:44:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1029 transitions. [2023-08-03 20:44:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774941995359629 [2023-08-03 20:44:20,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1029 transitions. [2023-08-03 20:44:20,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1029 transitions. [2023-08-03 20:44:20,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:20,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1029 transitions. [2023-08-03 20:44:20,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.8) internal successors, (1029), 5 states have internal predecessors, (1029), 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 20:44:20,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:44:20,348 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:44:20,349 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 250 flow. Second operand 5 states and 1029 transitions. [2023-08-03 20:44:20,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 414 flow [2023-08-03 20:44:20,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:44:20,373 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 255 flow [2023-08-03 20:44:20,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-08-03 20:44:20,374 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-03 20:44:20,374 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 255 flow [2023-08-03 20:44:20,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 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 20:44:20,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:20,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:20,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:44:20,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:20,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:20,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1601023042, now seen corresponding path program 1 times [2023-08-03 20:44:20,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367683508] [2023-08-03 20:44:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:20,655 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 20:44:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367683508] [2023-08-03 20:44:20,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367683508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:44:20,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:44:20,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:44:20,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103365131] [2023-08-03 20:44:20,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:44:20,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:44:20,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:44:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:44:20,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:44:20,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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 20:44:20,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:44:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:37,775 INFO L124 PetriNetUnfolderBase]: 193928/265468 cut-off events. [2023-08-03 20:44:37,776 INFO L125 PetriNetUnfolderBase]: For 29573/29573 co-relation queries the response was YES. [2023-08-03 20:44:38,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522224 conditions, 265468 events. 193928/265468 cut-off events. For 29573/29573 co-relation queries the response was YES. Maximal size of possible extension queue 6349. Compared 1871382 event pairs, 110346 based on Foata normal form. 0/203574 useless extension candidates. Maximal degree in co-relation 179754. Up to 238483 conditions per place. [2023-08-03 20:44:39,319 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 71 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-03 20:44:39,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 425 flow [2023-08-03 20:44:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:44:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:44:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-03 20:44:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019334880123744 [2023-08-03 20:44:39,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-03 20:44:39,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-03 20:44:39,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:39,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-03 20:44:39,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 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 20:44:39,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:39,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:39,328 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 255 flow. Second operand 3 states and 649 transitions. [2023-08-03 20:44:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 425 flow [2023-08-03 20:44:39,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 418 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:44:39,335 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 263 flow [2023-08-03 20:44:39,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-03 20:44:39,338 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-08-03 20:44:39,338 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 263 flow [2023-08-03 20:44:39,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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 20:44:39,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:39,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:39,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:44:39,339 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:39,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 346320295, now seen corresponding path program 1 times [2023-08-03 20:44:39,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:39,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71728060] [2023-08-03 20:44:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:39,430 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 20:44:39,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71728060] [2023-08-03 20:44:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71728060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071098420] [2023-08-03 20:44:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:39,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:39,435 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 20:44:39,438 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 20:44:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:39,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:44:39,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:39,534 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 20:44:39,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:44:39,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071098420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:44:39,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:44:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:44:39,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502280981] [2023-08-03 20:44:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:44:39,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:44:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:44:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:44:39,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:44:39,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 20:44:39,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:39,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:44:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:44:56,437 INFO L124 PetriNetUnfolderBase]: 193784/256912 cut-off events. [2023-08-03 20:44:56,437 INFO L125 PetriNetUnfolderBase]: For 21468/21468 co-relation queries the response was YES. [2023-08-03 20:44:57,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513848 conditions, 256912 events. 193784/256912 cut-off events. For 21468/21468 co-relation queries the response was YES. Maximal size of possible extension queue 6382. Compared 1691786 event pairs, 109592 based on Foata normal form. 0/195195 useless extension candidates. Maximal degree in co-relation 176085. Up to 235276 conditions per place. [2023-08-03 20:44:58,016 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-03 20:44:58,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 455 flow [2023-08-03 20:44:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:44:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:44:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-03 20:44:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505800464037123 [2023-08-03 20:44:58,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-03 20:44:58,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-03 20:44:58,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:44:58,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-03 20:44:58,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 20:44:58,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:58,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:44:58,024 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 263 flow. Second operand 3 states and 654 transitions. [2023-08-03 20:44:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 455 flow [2023-08-03 20:44:58,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 92 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:44:58,034 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 272 flow [2023-08-03 20:44:58,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-03 20:44:58,035 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-03 20:44:58,035 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 272 flow [2023-08-03 20:44:58,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 20:44:58,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:44:58,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:44:58,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 20:44:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:58,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:44:58,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:44:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1104626483, now seen corresponding path program 1 times [2023-08-03 20:44:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:44:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425496338] [2023-08-03 20:44:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:58,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:44:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:58,325 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 20:44:58,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:44:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425496338] [2023-08-03 20:44:58,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425496338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:44:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398034110] [2023-08-03 20:44:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:44:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:44:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:44:58,330 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 20:44:58,333 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 20:44:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:44:58,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:44:58,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:44:58,433 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 20:44:58,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:44:58,454 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 20:44:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398034110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:44:58,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:44:58,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:44:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37168021] [2023-08-03 20:44:58,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:44:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:44:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:44:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:44:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:44:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-03 20:44:58,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 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 20:44:58,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:44:58,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-03 20:44:58,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:45:16,118 INFO L124 PetriNetUnfolderBase]: 188087/246769 cut-off events. [2023-08-03 20:45:16,118 INFO L125 PetriNetUnfolderBase]: For 21285/21285 co-relation queries the response was YES. [2023-08-03 20:45:16,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498771 conditions, 246769 events. 188087/246769 cut-off events. For 21285/21285 co-relation queries the response was YES. Maximal size of possible extension queue 6214. Compared 1572385 event pairs, 86150 based on Foata normal form. 3/188303 useless extension candidates. Maximal degree in co-relation 152218. Up to 231298 conditions per place. [2023-08-03 20:45:17,747 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 71 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-03 20:45:17,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 86 transitions, 434 flow [2023-08-03 20:45:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:45:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:45:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 837 transitions. [2023-08-03 20:45:17,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48549883990719256 [2023-08-03 20:45:17,750 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 837 transitions. [2023-08-03 20:45:17,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 837 transitions. [2023-08-03 20:45:17,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:45:17,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 837 transitions. [2023-08-03 20:45:17,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.25) internal successors, (837), 4 states have internal predecessors, (837), 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 20:45:17,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 20:45:17,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 20:45:17,757 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 272 flow. Second operand 4 states and 837 transitions. [2023-08-03 20:45:17,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 86 transitions, 434 flow [2023-08-03 20:45:17,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:45:17,772 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 268 flow [2023-08-03 20:45:17,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-03 20:45:17,773 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 20:45:17,773 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 268 flow [2023-08-03 20:45:17,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 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 20:45:17,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:45:17,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:45:17,778 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 20:45:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:17,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:45:17,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:45:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1817711991, now seen corresponding path program 1 times [2023-08-03 20:45:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:45:17,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962059839] [2023-08-03 20:45:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:45:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:18,036 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 20:45:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:45:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962059839] [2023-08-03 20:45:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962059839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:45:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631626552] [2023-08-03 20:45:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:45:18,039 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 20:45:18,040 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 20:45:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:18,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:45:18,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:45:18,153 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 20:45:18,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:45:18,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631626552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:45:18,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:45:18,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:45:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193574538] [2023-08-03 20:45:18,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:45:18,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:45:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:45:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:45:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:45:18,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-03 20:45:18,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 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 20:45:18,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:45:18,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-03 20:45:18,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:45:33,806 INFO L124 PetriNetUnfolderBase]: 187763/246364 cut-off events. [2023-08-03 20:45:33,807 INFO L125 PetriNetUnfolderBase]: For 20687/20687 co-relation queries the response was YES. [2023-08-03 20:45:34,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497596 conditions, 246364 events. 187763/246364 cut-off events. For 20687/20687 co-relation queries the response was YES. Maximal size of possible extension queue 6214. Compared 1570176 event pairs, 43034 based on Foata normal form. 81/188111 useless extension candidates. Maximal degree in co-relation 215893. Up to 230152 conditions per place. [2023-08-03 20:45:35,313 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 89 selfloop transitions, 4 changer transitions 0/104 dead transitions. [2023-08-03 20:45:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 510 flow [2023-08-03 20:45:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:45:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:45:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1047 transitions. [2023-08-03 20:45:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48584686774941993 [2023-08-03 20:45:35,316 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1047 transitions. [2023-08-03 20:45:35,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1047 transitions. [2023-08-03 20:45:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:45:35,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1047 transitions. [2023-08-03 20:45:35,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.4) internal successors, (1047), 5 states have internal predecessors, (1047), 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 20:45:35,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:45:35,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:45:35,322 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 268 flow. Second operand 5 states and 1047 transitions. [2023-08-03 20:45:35,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 510 flow [2023-08-03 20:45:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 496 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:45:35,342 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 271 flow [2023-08-03 20:45:35,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-03 20:45:35,343 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 20:45:35,343 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 271 flow [2023-08-03 20:45:35,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 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 20:45:35,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:45:35,344 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 20:45:35,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 20:45:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:35,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:45:35,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:45:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 596675495, now seen corresponding path program 1 times [2023-08-03 20:45:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:45:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646942676] [2023-08-03 20:45:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:45:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:35,620 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 20:45:35,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:45:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646942676] [2023-08-03 20:45:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646942676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:45:35,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36466684] [2023-08-03 20:45:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:45:35,624 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 20:45:35,652 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 20:45:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:35,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:45:35,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:45:35,734 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 20:45:35,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:45:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36466684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:45:35,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:45:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:45:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59057192] [2023-08-03 20:45:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:45:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:45:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:45:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:45:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:45:35,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:45:35,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 20:45:35,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:45:35,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:45:35,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:45:49,869 INFO L124 PetriNetUnfolderBase]: 160682/211696 cut-off events. [2023-08-03 20:45:49,870 INFO L125 PetriNetUnfolderBase]: For 15538/15538 co-relation queries the response was YES. [2023-08-03 20:45:50,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427219 conditions, 211696 events. 160682/211696 cut-off events. For 15538/15538 co-relation queries the response was YES. Maximal size of possible extension queue 5412. Compared 1336379 event pairs, 93864 based on Foata normal form. 0/162677 useless extension candidates. Maximal degree in co-relation 191788. Up to 172153 conditions per place. [2023-08-03 20:45:51,398 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 87 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-03 20:45:51,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 511 flow [2023-08-03 20:45:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:45:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:45:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-03 20:45:51,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-03 20:45:51,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-03 20:45:51,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-03 20:45:51,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:45:51,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-03 20:45:51,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 20:45:51,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:45:51,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:45:51,404 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 271 flow. Second operand 3 states and 662 transitions. [2023-08-03 20:45:51,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 511 flow [2023-08-03 20:45:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 504 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:45:51,419 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 276 flow [2023-08-03 20:45:51,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2023-08-03 20:45:51,420 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-03 20:45:51,420 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 276 flow [2023-08-03 20:45:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 20:45:51,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:45:51,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:45:51,426 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 20:45:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:51,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:45:51,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:45:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1320102548, now seen corresponding path program 1 times [2023-08-03 20:45:51,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:45:51,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795733509] [2023-08-03 20:45:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:45:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:45:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:45:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795733509] [2023-08-03 20:45:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795733509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:45:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127920355] [2023-08-03 20:45:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:45:51,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:45:51,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:45:51,670 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 20:45:51,692 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 20:45:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:45:51,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:45:51,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:45:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:45:51,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:45:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:45:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127920355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:45:51,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:45:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:45:51,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25127780] [2023-08-03 20:45:51,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:45:51,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:45:51,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:45:51,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:45:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:45:51,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-03 20:45:51,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 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 20:45:51,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:45:51,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-03 20:45:51,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:46:05,365 INFO L124 PetriNetUnfolderBase]: 152069/199654 cut-off events. [2023-08-03 20:46:05,366 INFO L125 PetriNetUnfolderBase]: For 22160/22160 co-relation queries the response was YES. [2023-08-03 20:46:06,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412723 conditions, 199654 events. 152069/199654 cut-off events. For 22160/22160 co-relation queries the response was YES. Maximal size of possible extension queue 5251. Compared 1237113 event pairs, 70897 based on Foata normal form. 27/156918 useless extension candidates. Maximal degree in co-relation 188891. Up to 187831 conditions per place. [2023-08-03 20:46:06,700 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 84 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-03 20:46:06,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 488 flow [2023-08-03 20:46:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:46:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:46:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 849 transitions. [2023-08-03 20:46:06,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49245939675174016 [2023-08-03 20:46:06,702 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 849 transitions. [2023-08-03 20:46:06,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 849 transitions. [2023-08-03 20:46:06,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:46:06,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 849 transitions. [2023-08-03 20:46:06,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.25) internal successors, (849), 4 states have internal predecessors, (849), 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 20:46:06,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 20:46:06,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 20:46:06,707 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 276 flow. Second operand 4 states and 849 transitions. [2023-08-03 20:46:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 488 flow [2023-08-03 20:46:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:46:06,805 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 272 flow [2023-08-03 20:46:06,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-08-03 20:46:06,806 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-03 20:46:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 272 flow [2023-08-03 20:46:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 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 20:46:06,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:46:06,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:46:06,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 20:46:07,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:07,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:46:07,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:46:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1661636940, now seen corresponding path program 1 times [2023-08-03 20:46:07,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:46:07,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312389071] [2023-08-03 20:46:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:46:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:46:07,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:46:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312389071] [2023-08-03 20:46:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312389071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:46:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902192021] [2023-08-03 20:46:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:07,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:46:07,101 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 20:46:07,111 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 20:46:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:07,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:46:07,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:46:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 20:46:07,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:46:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902192021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:46:07,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:46:07,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:46:07,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818144622] [2023-08-03 20:46:07,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:46:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:46:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:46:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:46:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:46:07,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-03 20:46:07,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 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 20:46:07,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:46:07,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-03 20:46:07,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:46:19,652 INFO L124 PetriNetUnfolderBase]: 148181/192526 cut-off events. [2023-08-03 20:46:19,652 INFO L125 PetriNetUnfolderBase]: For 16718/16718 co-relation queries the response was YES. [2023-08-03 20:46:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398746 conditions, 192526 events. 148181/192526 cut-off events. For 16718/16718 co-relation queries the response was YES. Maximal size of possible extension queue 5250. Compared 1162129 event pairs, 2969 based on Foata normal form. 729/152031 useless extension candidates. Maximal degree in co-relation 184502. Up to 173830 conditions per place. [2023-08-03 20:46:20,705 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 105 selfloop transitions, 4 changer transitions 0/119 dead transitions. [2023-08-03 20:46:20,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 576 flow [2023-08-03 20:46:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:46:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:46:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1062 transitions. [2023-08-03 20:46:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280742459396754 [2023-08-03 20:46:20,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1062 transitions. [2023-08-03 20:46:20,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1062 transitions. [2023-08-03 20:46:20,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:46:20,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1062 transitions. [2023-08-03 20:46:20,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.4) internal successors, (1062), 5 states have internal predecessors, (1062), 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 20:46:20,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:46:20,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 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 20:46:20,714 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 272 flow. Second operand 5 states and 1062 transitions. [2023-08-03 20:46:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 576 flow [2023-08-03 20:46:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 562 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:46:20,858 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 275 flow [2023-08-03 20:46:20,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2023-08-03 20:46:20,858 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-03 20:46:20,859 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 275 flow [2023-08-03 20:46:20,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 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 20:46:20,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:46:20,859 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 20:46:20,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 20:46:21,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:21,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:46:21,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:46:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -949154904, now seen corresponding path program 1 times [2023-08-03 20:46:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:46:21,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315684029] [2023-08-03 20:46:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:46:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:21,131 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 20:46:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:46:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315684029] [2023-08-03 20:46:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315684029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:46:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884531760] [2023-08-03 20:46:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:46:21,134 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 20:46:21,138 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 20:46:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:21,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:46:21,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:46:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:46:21,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:46:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884531760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:46:21,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:46:21,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:46:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335194008] [2023-08-03 20:46:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:46:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:46:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:46:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:46:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:46:21,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:46:21,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 20:46:21,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:46:21,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:46:21,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:46:33,792 INFO L124 PetriNetUnfolderBase]: 136066/179623 cut-off events. [2023-08-03 20:46:33,792 INFO L125 PetriNetUnfolderBase]: For 23519/23519 co-relation queries the response was YES. [2023-08-03 20:46:34,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372940 conditions, 179623 events. 136066/179623 cut-off events. For 23519/23519 co-relation queries the response was YES. Maximal size of possible extension queue 4231. Compared 1111942 event pairs, 72767 based on Foata normal form. 0/143175 useless extension candidates. Maximal degree in co-relation 178491. Up to 128305 conditions per place. [2023-08-03 20:46:34,805 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 88 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-03 20:46:34,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 515 flow [2023-08-03 20:46:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:46:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:46:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-03 20:46:34,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-03 20:46:34,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-03 20:46:34,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-03 20:46:34,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:46:34,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-03 20:46:34,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 20:46:34,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:46:34,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:46:34,811 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 275 flow. Second operand 3 states and 662 transitions. [2023-08-03 20:46:34,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 515 flow [2023-08-03 20:46:34,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 508 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:46:34,888 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 280 flow [2023-08-03 20:46:34,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2023-08-03 20:46:34,888 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-08-03 20:46:34,889 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 280 flow [2023-08-03 20:46:34,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 20:46:34,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:46:34,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:46:34,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 20:46:35,090 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,SelfDestructingSolverStorable10 [2023-08-03 20:46:35,090 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:46:35,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:46:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash -291380230, now seen corresponding path program 1 times [2023-08-03 20:46:35,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:46:35,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179080190] [2023-08-03 20:46:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:46:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-03 20:46:35,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:46:35,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179080190] [2023-08-03 20:46:35,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179080190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:46:35,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193912168] [2023-08-03 20:46:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:35,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:35,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:46:35,149 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 20:46:35,175 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 20:46:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:35,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:46:35,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:46:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:46:35,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:46:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193912168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:46:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:46:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:46:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605807974] [2023-08-03 20:46:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:46:35,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:46:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:46:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:46:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:46:35,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-03 20:46:35,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 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 20:46:35,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:46:35,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-03 20:46:35,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:46:47,734 INFO L124 PetriNetUnfolderBase]: 135336/179374 cut-off events. [2023-08-03 20:46:47,734 INFO L125 PetriNetUnfolderBase]: For 26216/26216 co-relation queries the response was YES. [2023-08-03 20:46:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381342 conditions, 179374 events. 135336/179374 cut-off events. For 26216/26216 co-relation queries the response was YES. Maximal size of possible extension queue 4071. Compared 1116289 event pairs, 85917 based on Foata normal form. 0/146218 useless extension candidates. Maximal degree in co-relation 185468. Up to 150528 conditions per place. [2023-08-03 20:46:49,037 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 89 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-03 20:46:49,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 101 transitions, 522 flow [2023-08-03 20:46:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:46:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:46:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-03 20:46:49,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-03 20:46:49,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-03 20:46:49,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-03 20:46:49,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:46:49,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-03 20:46:49,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 20:46:49,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:46:49,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 20:46:49,043 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 280 flow. Second operand 3 states and 662 transitions. [2023-08-03 20:46:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 101 transitions, 522 flow [2023-08-03 20:46:53,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 101 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:46:53,594 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 290 flow [2023-08-03 20:46:53,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-08-03 20:46:53,595 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-08-03 20:46:53,595 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 290 flow [2023-08-03 20:46:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 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 20:46:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:46:53,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:46:53,599 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 20:46:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:53,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 20:46:53,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:46:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2141885067, now seen corresponding path program 1 times [2023-08-03 20:46:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:46:53,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486448478] [2023-08-03 20:46:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:46:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:46:53,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:46:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486448478] [2023-08-03 20:46:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486448478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:46:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634397692] [2023-08-03 20:46:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:46:53,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:46:53,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:46:53,885 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 20:46:53,901 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 20:46:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:46:54,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-03 20:46:54,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:46:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:46:54,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:46:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634397692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:46:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:46:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-03 20:46:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340873179] [2023-08-03 20:46:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:46:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:46:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:46:54,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:46:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:46:54,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 431 [2023-08-03 20:46:54,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 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 20:46:54,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:46:54,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 431 [2023-08-03 20:46:54,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand