/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/pthread-wmm_safe002_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:54:02,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:54:02,448 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:54:02,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:54:02,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:54:02,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:54:02,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:54:02,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:54:02,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:54:02,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:54:02,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:54:02,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:54:02,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:54:02,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:54:02,491 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:54:02,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:54:02,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:54:02,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:54:02,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:54:02,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:54:02,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:54:02,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:54:02,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:54:02,493 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:54:02,493 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:54:02,493 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:54:02,493 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:54:02,494 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:54:02,494 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:54:02,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:54:02,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:54:02,495 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:54:02,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:54:02,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:54:02,496 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:54:02,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:54:02,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:54:02,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:54:02,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:54:02,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:54:02,748 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:54:02,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.oepc_bound2.i [2023-08-03 17:54:03,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:54:04,110 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:54:04,111 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.oepc_bound2.i [2023-08-03 17:54:04,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aadbdafd/b3800d865fd34cd2a0f8c70514237d9f/FLAGb4fa6a692 [2023-08-03 17:54:04,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aadbdafd/b3800d865fd34cd2a0f8c70514237d9f [2023-08-03 17:54:04,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:54:04,140 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:54:04,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:54:04,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:54:04,144 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:54:04,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f8141a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04, skipping insertion in model container [2023-08-03 17:54:04,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,189 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:54:04,332 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.oepc_bound2.i[995,1008] [2023-08-03 17:54:04,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:54:04,568 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:54:04,577 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_power.oepc_bound2.i[995,1008] [2023-08-03 17:54:04,592 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 17:54:04,593 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 17:54:04,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:54:04,693 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:54:04,693 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:54:04,699 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:54:04,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04 WrapperNode [2023-08-03 17:54:04,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:54:04,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:54:04,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:54:04,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:54:04,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,744 INFO L138 Inliner]: procedures = 176, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 194 [2023-08-03 17:54:04,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:54:04,745 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:54:04,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:54:04,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:54:04,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,784 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:54:04,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:54:04,785 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:54:04,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:54:04,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (1/1) ... [2023-08-03 17:54:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:54:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:54:04,818 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 17:54:04,829 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 17:54:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 17:54:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:54:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:54:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:54:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:54:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:54:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:54:04,855 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:54:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:54:04,855 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:54:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 17:54:04,856 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 17:54:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:54:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:54:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:54:04,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:54:04,858 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 17:54:05,029 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:54:05,031 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:54:05,488 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:54:05,830 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:54:05,830 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 17:54:05,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:54:05 BoogieIcfgContainer [2023-08-03 17:54:05,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:54:05,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:54:05,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:54:05,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:54:05,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:54:04" (1/3) ... [2023-08-03 17:54:05,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15945495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:54:05, skipping insertion in model container [2023-08-03 17:54:05,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:54:04" (2/3) ... [2023-08-03 17:54:05,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15945495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:54:05, skipping insertion in model container [2023-08-03 17:54:05,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:54:05" (3/3) ... [2023-08-03 17:54:05,843 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe002_power.oepc_bound2.i [2023-08-03 17:54:05,850 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:54:05,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:54:05,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 17:54:05,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:54:05,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:54:05,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 17:54:06,153 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 17:54:06,153 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:54:06,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1947 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 17:54:06,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 17:54:06,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 134 transitions, 283 flow [2023-08-03 17:54:06,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:54:06,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 134 transitions, 283 flow [2023-08-03 17:54:06,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 134 transitions, 283 flow [2023-08-03 17:54:06,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 134 transitions, 283 flow [2023-08-03 17:54:06,225 INFO L124 PetriNetUnfolderBase]: 22/369 cut-off events. [2023-08-03 17:54:06,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:54:06,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 369 events. 22/369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1401 event pairs, 0 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 238. Up to 16 conditions per place. [2023-08-03 17:54:06,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 1916 [2023-08-03 17:54:13,475 INFO L134 LiptonReduction]: Checked pairs total: 5341 [2023-08-03 17:54:13,475 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-03 17:54:13,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:54:13,491 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;@7103000e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:54:13,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 17:54:13,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:54:13,496 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 17:54:13,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:54:13,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:54:13,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:54:13,497 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 17:54:13,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:54:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1342556623, now seen corresponding path program 1 times [2023-08-03 17:54:13,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:54:13,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468240954] [2023-08-03 17:54:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:13,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:54:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:54:13,609 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:54:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:54:13,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:54:13,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:54:13,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 17:54:13,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 17:54:13,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 17:54:13,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 17:54:13,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:54:13,683 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 17:54:13,687 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:54:13,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:54:13,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:54:13,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 17:54:13,950 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 17:54:13,950 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:54:13,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9411 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 17:54:13,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 17:54:13,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 157 transitions, 350 flow [2023-08-03 17:54:13,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:54:13,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 157 transitions, 350 flow [2023-08-03 17:54:13,961 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 157 transitions, 350 flow [2023-08-03 17:54:13,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 157 transitions, 350 flow [2023-08-03 17:54:14,095 INFO L124 PetriNetUnfolderBase]: 66/1068 cut-off events. [2023-08-03 17:54:14,096 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:54:14,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 1068 events. 66/1068 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6626 event pairs, 0 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 799. Up to 54 conditions per place. [2023-08-03 17:54:14,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 4748 [2023-08-03 17:54:22,561 INFO L134 LiptonReduction]: Checked pairs total: 15817 [2023-08-03 17:54:22,561 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-03 17:54:22,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:54:22,572 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;@7103000e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:54:22,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 17:54:22,578 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:54:22,578 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-03 17:54:22,578 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 17:54:22,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:54:22,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:54:22,579 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 17:54:22,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:54:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 666114863, now seen corresponding path program 1 times [2023-08-03 17:54:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:54:22,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174892575] [2023-08-03 17:54:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:54:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:54:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:54:22,767 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 17:54:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:54:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174892575] [2023-08-03 17:54:22,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174892575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:54:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:54:22,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:54:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394066992] [2023-08-03 17:54:22,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:54:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:54:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:54:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:54:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:54:22,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 17:54:22,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:54:22,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:54:22,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 17:54:22,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:54:59,004 INFO L124 PetriNetUnfolderBase]: 155552/210012 cut-off events. [2023-08-03 17:54:59,004 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2023-08-03 17:54:59,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412871 conditions, 210012 events. 155552/210012 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 5974. Compared 1473279 event pairs, 126978 based on Foata normal form. 5292/202692 useless extension candidates. Maximal degree in co-relation 118568. Up to 198414 conditions per place. [2023-08-03 17:55:00,281 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 37 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-03 17:55:00,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 220 flow [2023-08-03 17:55:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:55:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:55:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-03 17:55:00,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2023-08-03 17:55:00,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-03 17:55:00,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-03 17:55:00,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:55:00,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-03 17:55:00,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states 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 17:55:00,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:55:00,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:55:00,317 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 134 flow. Second operand 3 states and 471 transitions. [2023-08-03 17:55:00,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 220 flow [2023-08-03 17:55:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 214 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 17:55:00,331 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 136 flow [2023-08-03 17:55:00,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-08-03 17:55:00,337 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 17:55:00,340 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 136 flow [2023-08-03 17:55:00,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:00,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:55:00,345 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 17:55:00,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:55:00,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 17:55:00,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:55:00,349 INFO L85 PathProgramCache]: Analyzing trace with hash 764473925, now seen corresponding path program 1 times [2023-08-03 17:55:00,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:55:00,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243022621] [2023-08-03 17:55:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:55:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:00,457 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 17:55:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:55:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243022621] [2023-08-03 17:55:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243022621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:55:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023175694] [2023-08-03 17:55:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:00,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:55:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:55:00,464 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 17:55:00,465 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 17:55:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:00,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:55:00,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:55:00,634 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 17:55:00,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:55:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023175694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:55:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:55:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 17:55:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373279604] [2023-08-03 17:55:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:55:00,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:55:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:55:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:55:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:55:00,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-03 17:55:00,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:00,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:55:00,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-03 17:55:00,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:55:30,875 INFO L124 PetriNetUnfolderBase]: 135758/183519 cut-off events. [2023-08-03 17:55:30,875 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-03 17:55:31,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360947 conditions, 183519 events. 135758/183519 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 5177. Compared 1272073 event pairs, 91944 based on Foata normal form. 9/176460 useless extension candidates. Maximal degree in co-relation 128651. Up to 173293 conditions per place. [2023-08-03 17:55:32,044 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 40 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-03 17:55:32,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 238 flow [2023-08-03 17:55:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 17:55:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 17:55:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 17:55:32,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298245614035088 [2023-08-03 17:55:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 17:55:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 17:55:32,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:55:32,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 17:55:32,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:32,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 17:55:32,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states 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 17:55:32,057 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 136 flow. Second operand 5 states and 755 transitions. [2023-08-03 17:55:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 238 flow [2023-08-03 17:55:32,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 17:55:32,060 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 150 flow [2023-08-03 17:55:32,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-03 17:55:32,061 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-08-03 17:55:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 150 flow [2023-08-03 17:55:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:32,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:55:32,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:55:32,071 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 17:55:32,266 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 17:55:32,267 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 17:55:32,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:55:32,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1004133407, now seen corresponding path program 1 times [2023-08-03 17:55:32,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:55:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983108801] [2023-08-03 17:55:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:32,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:55:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:55:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:55:32,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983108801] [2023-08-03 17:55:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983108801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:55:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999161804] [2023-08-03 17:55:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:55:32,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:55:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:55:32,372 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 17:55:32,375 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 17:55:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:55:32,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:55:32,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:55:32,531 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 17:55:32,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:55:32,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999161804] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:55:32,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:55:32,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:55:32,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687992410] [2023-08-03 17:55:32,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:55:32,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:55:32,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:55:32,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:55:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:55:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 17:55:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:55:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:55:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 17:55:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:56:01,037 INFO L124 PetriNetUnfolderBase]: 131626/177364 cut-off events. [2023-08-03 17:56:01,037 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-03 17:56:01,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349187 conditions, 177364 events. 131626/177364 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 5092. Compared 1225333 event pairs, 104758 based on Foata normal form. 0/171508 useless extension candidates. Maximal degree in co-relation 100472. Up to 167284 conditions per place. [2023-08-03 17:56:02,060 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 17:56:02,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 57 transitions, 260 flow [2023-08-03 17:56:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:56:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:56:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-03 17:56:02,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543859649122806 [2023-08-03 17:56:02,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-03 17:56:02,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-03 17:56:02,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:56:02,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-03 17:56:02,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states 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 17:56:02,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:56:02,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:56:02,067 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 150 flow. Second operand 3 states and 474 transitions. [2023-08-03 17:56:02,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 57 transitions, 260 flow [2023-08-03 17:56:02,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 17:56:02,069 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 158 flow [2023-08-03 17:56:02,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 17:56:02,070 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 17:56:02,070 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 158 flow [2023-08-03 17:56:02,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:02,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:56:02,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:56:02,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 17:56:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 17:56:02,276 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 17:56:02,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:56:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1898221361, now seen corresponding path program 1 times [2023-08-03 17:56:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:56:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84776423] [2023-08-03 17:56:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:56:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:02,339 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 17:56:02,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:56:02,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84776423] [2023-08-03 17:56:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84776423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:56:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937334398] [2023-08-03 17:56:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:56:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:56:02,341 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 17:56:02,348 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 17:56:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:02,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:56:02,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:56:02,500 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 17:56:02,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:56:02,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937334398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:56:02,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:56:02,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:56:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76852856] [2023-08-03 17:56:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:56:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:56:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:56:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:56:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:56:02,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 17:56:02,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:02,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:56:02,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 17:56:02,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:56:30,668 INFO L124 PetriNetUnfolderBase]: 129210/171732 cut-off events. [2023-08-03 17:56:30,668 INFO L125 PetriNetUnfolderBase]: For 1644/1644 co-relation queries the response was YES. [2023-08-03 17:56:31,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340935 conditions, 171732 events. 129210/171732 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 5041. Compared 1152490 event pairs, 101106 based on Foata normal form. 0/165972 useless extension candidates. Maximal degree in co-relation 98148. Up to 159000 conditions per place. [2023-08-03 17:56:31,718 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 51 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-03 17:56:31,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 294 flow [2023-08-03 17:56:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:56:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:56:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-03 17:56:31,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-08-03 17:56:31,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-03 17:56:31,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-03 17:56:31,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:56:31,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-03 17:56:31,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 17:56:31,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:56:31,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states 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 17:56:31,724 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 158 flow. Second operand 3 states and 480 transitions. [2023-08-03 17:56:31,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 294 flow [2023-08-03 17:56:31,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:56:31,727 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 167 flow [2023-08-03 17:56:31,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-03 17:56:31,728 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-03 17:56:31,728 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 167 flow [2023-08-03 17:56:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:31,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:56:31,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:56:31,739 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 17:56:31,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:56:31,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === 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 17:56:31,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:56:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1503269680, now seen corresponding path program 1 times [2023-08-03 17:56:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:56:31,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615970343] [2023-08-03 17:56:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:56:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:31,991 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 17:56:31,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:56:31,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615970343] [2023-08-03 17:56:31,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615970343] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:56:31,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428421325] [2023-08-03 17:56:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:31,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:56:31,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:56:31,995 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 17:56:32,001 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 17:56:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:32,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:56:32,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:56:32,145 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 17:56:32,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:56:32,166 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 17:56:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428421325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:56:32,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:56:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 17:56:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944096285] [2023-08-03 17:56:32,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:56:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:56:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:56:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:56:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:56:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-03 17:56:32,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:32,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:56:32,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-03 17:56:32,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:56:54,672 INFO L124 PetriNetUnfolderBase]: 101266/132947 cut-off events. [2023-08-03 17:56:54,673 INFO L125 PetriNetUnfolderBase]: For 9732/9732 co-relation queries the response was YES. [2023-08-03 17:56:55,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272113 conditions, 132947 events. 101266/132947 cut-off events. For 9732/9732 co-relation queries the response was YES. Maximal size of possible extension queue 3955. Compared 835986 event pairs, 66420 based on Foata normal form. 3/132194 useless extension candidates. Maximal degree in co-relation 96489. Up to 127384 conditions per place. [2023-08-03 17:56:55,711 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 42 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 17:56:55,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 56 transitions, 265 flow [2023-08-03 17:56:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:56:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:56:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-03 17:56:55,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2023-08-03 17:56:55,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-03 17:56:55,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-03 17:56:55,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:56:55,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-03 17:56:55,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 17:56:55,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 17:56:55,717 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states 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 17:56:55,717 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 167 flow. Second operand 4 states and 612 transitions. [2023-08-03 17:56:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 56 transitions, 265 flow [2023-08-03 17:56:55,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 56 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:56:55,723 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 163 flow [2023-08-03 17:56:55,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 17:56:55,724 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 17:56:55,724 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 163 flow [2023-08-03 17:56:55,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:55,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:56:55,725 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:56:55,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 17:56:55,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:56:55,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === 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 17:56:55,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:56:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 611286527, now seen corresponding path program 1 times [2023-08-03 17:56:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:56:55,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124245441] [2023-08-03 17:56:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:56:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:55,984 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 17:56:55,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:56:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124245441] [2023-08-03 17:56:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124245441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:56:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760186722] [2023-08-03 17:56:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:56:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:56:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:56:55,986 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 17:56:56,015 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 17:56:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:56:56,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:56:56,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:56:56,131 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 17:56:56,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:56:56,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760186722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:56:56,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:56:56,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 17:56:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428406247] [2023-08-03 17:56:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:56:56,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:56:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:56:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:56:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:56:56,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-03 17:56:56,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:56:56,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:56:56,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-03 17:56:56,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand