/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:27:24,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:27:24,836 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:27:24,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:27:24,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:27:24,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:27:24,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:27:24,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:27:24,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:27:24,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:27:24,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:27:24,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:27:24,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:27:24,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:27:24,880 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:27:24,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:27:24,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:27:24,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:27:24,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:27:24,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:27:24,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:27:24,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:27:24,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:27:24,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:27:24,882 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:27:24,883 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:27:24,883 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:27:24,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:27:24,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:27:24,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:27:24,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:27:24,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:27:24,885 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:27:24,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:27:24,886 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:27:24,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:27:25,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:27:25,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:27:25,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:27:25,072 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:27:25,073 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:27:25,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 00:27:26,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:27:26,195 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:27:26,195 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 00:27:26,206 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241e80c18/89347b1ce11744edaf3a0632be702699/FLAG78d192d5e [2023-08-04 00:27:26,214 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241e80c18/89347b1ce11744edaf3a0632be702699 [2023-08-04 00:27:26,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:27:26,217 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:27:26,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:27:26,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:27:26,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:27:26,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f573f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26, skipping insertion in model container [2023-08-04 00:27:26,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,251 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:27:26,360 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_safe014_power.oepc_bound2.i[995,1008] [2023-08-04 00:27:26,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:27:26,551 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:27:26,559 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_safe014_power.oepc_bound2.i[995,1008] [2023-08-04 00:27:26,575 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:27:26,577 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:27:26,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:27:26,621 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:27:26,621 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:27:26,625 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:27:26,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26 WrapperNode [2023-08-04 00:27:26,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:27:26,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:27:26,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:27:26,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:27:26,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,664 INFO L138 Inliner]: procedures = 176, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 00:27:26,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:27:26,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:27:26,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:27:26,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:27:26,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,686 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,694 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:27:26,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:27:26,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:27:26,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:27:26,695 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (1/1) ... [2023-08-04 00:27:26,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:27:26,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:26,716 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) [2023-08-04 00:27:26,721 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 [2023-08-04 00:27:26,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:27:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:27:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:27:26,745 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:27:26,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:27:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:27:26,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:27:26,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:27:26,747 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:27:26,847 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:27:26,848 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:27:27,112 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:27:27,311 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:27:27,312 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:27:27,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:27:27 BoogieIcfgContainer [2023-08-04 00:27:27,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:27:27,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:27:27,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:27:27,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:27:27,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:27:26" (1/3) ... [2023-08-04 00:27:27,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32159fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:27:27, skipping insertion in model container [2023-08-04 00:27:27,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:27:26" (2/3) ... [2023-08-04 00:27:27,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32159fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:27:27, skipping insertion in model container [2023-08-04 00:27:27,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:27:27" (3/3) ... [2023-08-04 00:27:27,322 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 00:27:27,327 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:27:27,333 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:27:27,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:27:27,333 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:27:27,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:27:27,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:27:27,514 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-04 00:27:27,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:27:27,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1954 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 00:27:27,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:27:27,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 00:27:27,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:27:27,532 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:27:27,533 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:27:27,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 00:27:27,554 INFO L124 PetriNetUnfolderBase]: 6/231 cut-off events. [2023-08-04 00:27:27,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:27:27,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 231 events. 6/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 611 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-08-04 00:27:27,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 1160 [2023-08-04 00:27:32,418 INFO L134 LiptonReduction]: Checked pairs total: 2945 [2023-08-04 00:27:32,418 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 00:27:32,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:27:32,430 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;@499df814, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:27:32,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:27:32,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:27:32,434 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:27:32,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:27:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:27:32,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:32,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash 984187124, now seen corresponding path program 1 times [2023-08-04 00:27:32,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:32,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989002236] [2023-08-04 00:27:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:27:32,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:32,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989002236] [2023-08-04 00:27:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989002236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:27:32,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:27:32,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:27:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984828768] [2023-08-04 00:27:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:27:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:27:32,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:27:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:27:32,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 242 [2023-08-04 00:27:32,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2023-08-04 00:27:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 242 [2023-08-04 00:27:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:32,838 INFO L124 PetriNetUnfolderBase]: 200/404 cut-off events. [2023-08-04 00:27:32,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:27:32,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 404 events. 200/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1915 event pairs, 102 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 798. Up to 348 conditions per place. [2023-08-04 00:27:32,841 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 19 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-04 00:27:32,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 111 flow [2023-08-04 00:27:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:27:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:27:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-04 00:27:32,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559228650137741 [2023-08-04 00:27:32,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-04 00:27:32,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-04 00:27:32,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:32,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-04 00:27:32,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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) [2023-08-04 00:27:32,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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) [2023-08-04 00:27:32,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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) [2023-08-04 00:27:32,862 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 63 flow. Second operand 3 states and 406 transitions. [2023-08-04 00:27:32,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 111 flow [2023-08-04 00:27:32,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:27:32,865 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 71 flow [2023-08-04 00:27:32,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-04 00:27:32,868 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-04 00:27:32,868 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 71 flow [2023-08-04 00:27:32,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2023-08-04 00:27:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:27:32,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:27:32,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:32,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash 995409523, now seen corresponding path program 1 times [2023-08-04 00:27:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425853434] [2023-08-04 00:27:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:32,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:27:32,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:27:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:27:32,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:27:32,915 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:27:32,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:27:32,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:27:32,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:27:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:27:32,918 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:27:32,922 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:27:32,923 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:27:32,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:27:32,952 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:27:32,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 00:27:33,100 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-04 00:27:33,100 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:27:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9383 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-04 00:27:33,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 00:27:33,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 138 transitions, 312 flow [2023-08-04 00:27:33,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:27:33,109 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 138 transitions, 312 flow [2023-08-04 00:27:33,110 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 138 transitions, 312 flow [2023-08-04 00:27:33,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 138 transitions, 312 flow [2023-08-04 00:27:33,165 INFO L124 PetriNetUnfolderBase]: 12/603 cut-off events. [2023-08-04 00:27:33,165 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:27:33,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 603 events. 12/603 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2925 event pairs, 0 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 487. Up to 27 conditions per place. [2023-08-04 00:27:33,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 3152 [2023-08-04 00:27:39,095 INFO L134 LiptonReduction]: Checked pairs total: 9605 [2023-08-04 00:27:39,095 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 00:27:39,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:27:39,097 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;@499df814, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:27:39,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:27:39,102 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:27:39,102 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2023-08-04 00:27:39,102 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:27:39,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:39,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:27:39,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:39,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash -518510326, now seen corresponding path program 1 times [2023-08-04 00:27:39,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:39,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55823840] [2023-08-04 00:27:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:39,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:27:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55823840] [2023-08-04 00:27:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55823840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:27:39,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:27:39,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:27:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031564330] [2023-08-04 00:27:39,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:27:39,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:27:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:27:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:27:39,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 270 [2023-08-04 00:27:39,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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) [2023-08-04 00:27:39,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:39,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 270 [2023-08-04 00:27:39,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:42,903 INFO L124 PetriNetUnfolderBase]: 21408/31018 cut-off events. [2023-08-04 00:27:42,903 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2023-08-04 00:27:42,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62233 conditions, 31018 events. 21408/31018 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 209489 event pairs, 16818 based on Foata normal form. 0/30390 useless extension candidates. Maximal degree in co-relation 17678. Up to 28294 conditions per place. [2023-08-04 00:27:43,050 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 30 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-04 00:27:43,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 188 flow [2023-08-04 00:27:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:27:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:27:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 00:27:43,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-04 00:27:43,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 00:27:43,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 00:27:43,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:43,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 00:27:43,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2023-08-04 00:27:43,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-04 00:27:43,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-04 00:27:43,061 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 468 transitions. [2023-08-04 00:27:43,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 188 flow [2023-08-04 00:27:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 182 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:27:43,067 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-04 00:27:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-04 00:27:43,068 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 00:27:43,068 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-04 00:27:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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) [2023-08-04 00:27:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:43,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:27:43,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:27:43,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:43,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash -786031280, now seen corresponding path program 1 times [2023-08-04 00:27:43,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510282789] [2023-08-04 00:27:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:27:43,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510282789] [2023-08-04 00:27:43,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510282789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:27:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092545101] [2023-08-04 00:27:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:43,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:43,147 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) [2023-08-04 00:27:43,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:27:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:43,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:27:43,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:27:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:27:43,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:27:43,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092545101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:27:43,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:27:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:27:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174036290] [2023-08-04 00:27:43,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:27:43,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:27:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:27:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:27:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 270 [2023-08-04 00:27:43,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:27:43,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:43,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 270 [2023-08-04 00:27:43,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:47,187 INFO L124 PetriNetUnfolderBase]: 21396/30973 cut-off events. [2023-08-04 00:27:47,187 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2023-08-04 00:27:47,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61903 conditions, 30973 events. 21396/30973 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 209079 event pairs, 13380 based on Foata normal form. 9/30393 useless extension candidates. Maximal degree in co-relation 22151. Up to 28247 conditions per place. [2023-08-04 00:27:47,326 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 33 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-04 00:27:47,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 210 flow [2023-08-04 00:27:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:27:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:27:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-04 00:27:47,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614814814814815 [2023-08-04 00:27:47,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-04 00:27:47,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-04 00:27:47,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:47,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-04 00:27:47,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:27:47,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 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) [2023-08-04 00:27:47,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 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) [2023-08-04 00:27:47,333 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 758 transitions. [2023-08-04 00:27:47,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 210 flow [2023-08-04 00:27:47,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:27:47,335 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-04 00:27:47,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-04 00:27:47,335 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 00:27:47,335 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-04 00:27:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:27:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:47,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:27:47,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:27:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:47,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:47,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1425153456, now seen corresponding path program 1 times [2023-08-04 00:27:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389051833] [2023-08-04 00:27:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:27:47,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:47,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389051833] [2023-08-04 00:27:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389051833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:27:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085464176] [2023-08-04 00:27:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:47,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:47,600 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) [2023-08-04 00:27:47,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:27:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:47,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:27:47,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:27:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:27:47,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:27:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085464176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:27:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:27:47,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:27:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388118811] [2023-08-04 00:27:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:27:47,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:27:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:27:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:27:47,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 270 [2023-08-04 00:27:47,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2023-08-04 00:27:47,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:47,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 270 [2023-08-04 00:27:47,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:51,349 INFO L124 PetriNetUnfolderBase]: 20354/29156 cut-off events. [2023-08-04 00:27:51,349 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 00:27:51,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58603 conditions, 29156 events. 20354/29156 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 192789 event pairs, 16084 based on Foata normal form. 0/28603 useless extension candidates. Maximal degree in co-relation 16688. Up to 26614 conditions per place. [2023-08-04 00:27:51,469 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 35 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2023-08-04 00:27:51,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 00:27:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:27:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:27:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-04 00:27:51,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582716049382716 [2023-08-04 00:27:51,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-04 00:27:51,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-04 00:27:51,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:51,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-04 00:27:51,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 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) [2023-08-04 00:27:51,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-04 00:27:51,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 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) [2023-08-04 00:27:51,475 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 472 transitions. [2023-08-04 00:27:51,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 00:27:51,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 221 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:27:51,477 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-04 00:27:51,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-04 00:27:51,477 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-04 00:27:51,477 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-04 00:27:51,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2023-08-04 00:27:51,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:51,478 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:27:51,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:27:51,684 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 [2023-08-04 00:27:51,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:51,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash 166919378, now seen corresponding path program 1 times [2023-08-04 00:27:51,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:51,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578638044] [2023-08-04 00:27:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:51,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:27:51,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:51,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578638044] [2023-08-04 00:27:51,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578638044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:27:51,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597382769] [2023-08-04 00:27:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:51,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:51,733 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) [2023-08-04 00:27:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:27:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:51,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:27:51,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:27:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:27:51,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:27:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:27:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597382769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:27:51,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:27:51,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:27:51,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779905085] [2023-08-04 00:27:51,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:27:51,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:27:51,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:27:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:27:51,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 270 [2023-08-04 00:27:51,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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) [2023-08-04 00:27:51,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:51,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 270 [2023-08-04 00:27:51,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:54,910 INFO L124 PetriNetUnfolderBase]: 16066/22691 cut-off events. [2023-08-04 00:27:54,910 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2023-08-04 00:27:54,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45840 conditions, 22691 events. 16066/22691 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 141419 event pairs, 9684 based on Foata normal form. 3/22396 useless extension candidates. Maximal degree in co-relation 16321. Up to 20836 conditions per place. [2023-08-04 00:27:54,997 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 34 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 00:27:54,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 225 flow [2023-08-04 00:27:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:27:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:27:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-08-04 00:27:54,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675925925925925 [2023-08-04 00:27:54,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-08-04 00:27:54,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-08-04 00:27:54,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:54,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-08-04 00:27:55,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 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) [2023-08-04 00:27:55,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:27:55,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:27:55,002 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 613 transitions. [2023-08-04 00:27:55,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 225 flow [2023-08-04 00:27:55,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:27:55,006 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-04 00:27:55,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 00:27:55,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:27:55,009 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-04 00:27:55,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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) [2023-08-04 00:27:55,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:55,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:27:55,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:27:55,213 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 [2023-08-04 00:27:55,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:55,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:55,214 INFO L85 PathProgramCache]: Analyzing trace with hash 380511895, now seen corresponding path program 1 times [2023-08-04 00:27:55,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:55,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978292856] [2023-08-04 00:27:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:55,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:27:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978292856] [2023-08-04 00:27:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978292856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:27:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325562952] [2023-08-04 00:27:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:55,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:55,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:55,307 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) [2023-08-04 00:27:55,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:27:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:55,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:27:55,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:27:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:27:55,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:27:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325562952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:27:55,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:27:55,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:27:55,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567096588] [2023-08-04 00:27:55,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:27:55,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:27:55,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:55,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:27:55,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:27:55,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 270 [2023-08-04 00:27:55,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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) [2023-08-04 00:27:55,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:55,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 270 [2023-08-04 00:27:55,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:27:58,172 INFO L124 PetriNetUnfolderBase]: 15850/22273 cut-off events. [2023-08-04 00:27:58,173 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2023-08-04 00:27:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45084 conditions, 22273 events. 15850/22273 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 137557 event pairs, 4234 based on Foata normal form. 81/22137 useless extension candidates. Maximal degree in co-relation 16049. Up to 20007 conditions per place. [2023-08-04 00:27:58,286 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 46 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-04 00:27:58,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 277 flow [2023-08-04 00:27:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:27:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:27:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 770 transitions. [2023-08-04 00:27:58,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2023-08-04 00:27:58,288 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 770 transitions. [2023-08-04 00:27:58,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 770 transitions. [2023-08-04 00:27:58,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:27:58,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 770 transitions. [2023-08-04 00:27:58,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 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) [2023-08-04 00:27:58,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 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) [2023-08-04 00:27:58,291 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 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) [2023-08-04 00:27:58,291 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 770 transitions. [2023-08-04 00:27:58,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 277 flow [2023-08-04 00:27:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:27:58,293 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-04 00:27:58,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2023-08-04 00:27:58,293 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 00:27:58,294 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-04 00:27:58,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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) [2023-08-04 00:27:58,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:27:58,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:27:58,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:27:58,500 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 [2023-08-04 00:27:58,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:27:58,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:27:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1959988965, now seen corresponding path program 1 times [2023-08-04 00:27:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:27:58,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534443775] [2023-08-04 00:27:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:27:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:27:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:27:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534443775] [2023-08-04 00:27:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534443775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:27:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603375990] [2023-08-04 00:27:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:27:58,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:27:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:27:58,548 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) [2023-08-04 00:27:58,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:27:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:27:58,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:27:58,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:27:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:27:58,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:27:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:27:58,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603375990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:27:58,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:27:58,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:27:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800236851] [2023-08-04 00:27:58,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:27:58,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:27:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:27:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:27:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:27:58,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 270 [2023-08-04 00:27:58,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 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) [2023-08-04 00:27:58,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:27:58,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 270 [2023-08-04 00:27:58,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:28:00,629 INFO L124 PetriNetUnfolderBase]: 12583/17494 cut-off events. [2023-08-04 00:28:00,629 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2023-08-04 00:28:00,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35748 conditions, 17494 events. 12583/17494 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 103103 event pairs, 7717 based on Foata normal form. 27/17358 useless extension candidates. Maximal degree in co-relation 12692. Up to 15685 conditions per place. [2023-08-04 00:28:00,718 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 42 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 00:28:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 263 flow [2023-08-04 00:28:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:28:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:28:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-08-04 00:28:00,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2023-08-04 00:28:00,720 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-08-04 00:28:00,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-08-04 00:28:00,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:28:00,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-08-04 00:28:00,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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) [2023-08-04 00:28:00,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:28:00,723 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:28:00,723 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 621 transitions. [2023-08-04 00:28:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 263 flow [2023-08-04 00:28:00,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 55 transitions, 258 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:28:00,726 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-04 00:28:00,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-04 00:28:00,727 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-04 00:28:00,728 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-04 00:28:00,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 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) [2023-08-04 00:28:00,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:28:00,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:00,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:28:00,932 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 [2023-08-04 00:28:00,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:28:00,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:28:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2114519742, now seen corresponding path program 1 times [2023-08-04 00:28:00,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:28:00,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901268497] [2023-08-04 00:28:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:28:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:28:00,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:28:00,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901268497] [2023-08-04 00:28:00,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901268497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:28:00,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144785162] [2023-08-04 00:28:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:00,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:28:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:28:00,998 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) [2023-08-04 00:28:01,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:28:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:01,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:28:01,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:28:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:28:01,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:28:01,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144785162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:28:01,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:28:01,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:28:01,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094026990] [2023-08-04 00:28:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:28:01,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:28:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:28:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:28:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:28:01,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 270 [2023-08-04 00:28:01,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 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) [2023-08-04 00:28:01,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:28:01,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 270 [2023-08-04 00:28:01,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:28:02,348 INFO L124 PetriNetUnfolderBase]: 7183/10438 cut-off events. [2023-08-04 00:28:02,348 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-08-04 00:28:02,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21780 conditions, 10438 events. 7183/10438 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 60742 event pairs, 568 based on Foata normal form. 1296/11733 useless extension candidates. Maximal degree in co-relation 8699. Up to 7155 conditions per place. [2023-08-04 00:28:02,364 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-04 00:28:02,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 274 flow [2023-08-04 00:28:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:28:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:28:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-04 00:28:02,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5814814814814815 [2023-08-04 00:28:02,366 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-04 00:28:02,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-04 00:28:02,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:28:02,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-04 00:28:02,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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) [2023-08-04 00:28:02,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:28:02,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 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) [2023-08-04 00:28:02,368 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 628 transitions. [2023-08-04 00:28:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 274 flow [2023-08-04 00:28:02,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 267 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:28:02,387 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 00:28:02,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 00:28:02,387 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 00:28:02,387 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 00:28:02,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 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) [2023-08-04 00:28:02,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:28:02,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:28:02,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:28:02,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:28:02,592 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 [2023-08-04 00:28:02,592 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:02,593 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:28:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 00:28:02,673 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-04 00:28:02,673 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:28:02,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9383 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-04 00:28:02,675 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 00:28:02,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 152 transitions, 328 flow [2023-08-04 00:28:02,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:28:02,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 00:28:02,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 00:28:02,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 152 transitions, 328 flow [2023-08-04 00:28:02,733 INFO L124 PetriNetUnfolderBase]: 66/1049 cut-off events. [2023-08-04 00:28:02,733 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:28:02,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 1049 events. 66/1049 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6470 event pairs, 0 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 781. Up to 54 conditions per place. [2023-08-04 00:28:02,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-04 00:28:08,935 INFO L134 LiptonReduction]: Checked pairs total: 12559 [2023-08-04 00:28:08,936 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 00:28:08,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:28:08,941 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;@499df814, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:28:08,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:28:08,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:28:08,944 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-08-04 00:28:08,944 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:28:08,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:28:08,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:08,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:28:08,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:28:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1029735310, now seen corresponding path program 1 times [2023-08-04 00:28:08,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:28:08,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885166744] [2023-08-04 00:28:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:08,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:28:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:28:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:28:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885166744] [2023-08-04 00:28:08,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885166744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:28:08,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:28:08,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:28:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007374677] [2023-08-04 00:28:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:28:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:28:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:28:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:28:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:28:08,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 00:28:08,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 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) [2023-08-04 00:28:08,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:28:08,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 00:28:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:28:23,818 INFO L124 PetriNetUnfolderBase]: 90780/124837 cut-off events. [2023-08-04 00:28:23,818 INFO L125 PetriNetUnfolderBase]: For 1893/1893 co-relation queries the response was YES. [2023-08-04 00:28:24,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244498 conditions, 124837 events. 90780/124837 cut-off events. For 1893/1893 co-relation queries the response was YES. Maximal size of possible extension queue 3714. Compared 873157 event pairs, 73086 based on Foata normal form. 3276/120864 useless extension candidates. Maximal degree in co-relation 69697. Up to 117322 conditions per place. [2023-08-04 00:28:24,313 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 35 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 00:28:24,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 194 flow [2023-08-04 00:28:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:28:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:28:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-04 00:28:24,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594817432273262 [2023-08-04 00:28:24,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-04 00:28:24,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-04 00:28:24,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:28:24,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-04 00:28:24,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 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) [2023-08-04 00:28:24,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:24,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:24,317 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 475 transitions. [2023-08-04 00:28:24,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 194 flow [2023-08-04 00:28:24,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:28:24,319 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 00:28:24,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 00:28:24,319 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 00:28:24,320 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 00:28:24,320 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) [2023-08-04 00:28:24,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:28:24,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:24,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:28:24,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:28:24,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:28:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash 88398568, now seen corresponding path program 1 times [2023-08-04 00:28:24,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:28:24,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487102819] [2023-08-04 00:28:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:24,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:28:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:28:24,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:28:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487102819] [2023-08-04 00:28:24,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487102819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:28:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065923308] [2023-08-04 00:28:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:24,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:28:24,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:28:24,361 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) [2023-08-04 00:28:24,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:28:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:24,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:28:24,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:28:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:28:24,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:28:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065923308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:28:24,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:28:24,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:28:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115275085] [2023-08-04 00:28:24,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:28:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:28:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:28:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:28:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:28:24,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 00:28:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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) [2023-08-04 00:28:24,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:28:24,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 00:28:24,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:28:36,811 INFO L124 PetriNetUnfolderBase]: 75086/102233 cut-off events. [2023-08-04 00:28:36,811 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2023-08-04 00:28:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201034 conditions, 102233 events. 75086/102233 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 689909 event pairs, 60736 based on Foata normal form. 0/98836 useless extension candidates. Maximal degree in co-relation 200997. Up to 96475 conditions per place. [2023-08-04 00:28:37,255 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 40 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 00:28:37,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 220 flow [2023-08-04 00:28:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:28:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:28:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 00:28:37,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-04 00:28:37,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 00:28:37,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 00:28:37,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:28:37,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 00:28:37,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-08-04 00:28:37,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:37,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:37,259 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 477 transitions. [2023-08-04 00:28:37,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 220 flow [2023-08-04 00:28:37,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:28:37,260 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-04 00:28:37,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-04 00:28:37,261 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 00:28:37,261 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-04 00:28:37,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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) [2023-08-04 00:28:37,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:28:37,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:37,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:28:37,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:28:37,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:28:37,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:28:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -369714135, now seen corresponding path program 1 times [2023-08-04 00:28:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:28:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212762184] [2023-08-04 00:28:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:28:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:28:37,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:28:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212762184] [2023-08-04 00:28:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212762184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:28:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072199105] [2023-08-04 00:28:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:28:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:28:37,513 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) [2023-08-04 00:28:37,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:28:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:37,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:28:37,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:28:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:28:37,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:28:37,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072199105] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:28:37,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:28:37,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:28:37,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185473833] [2023-08-04 00:28:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:28:37,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:28:37,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:28:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:28:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:28:37,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 00:28:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2023-08-04 00:28:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:28:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 00:28:37,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:28:49,783 INFO L124 PetriNetUnfolderBase]: 73742/98786 cut-off events. [2023-08-04 00:28:49,784 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 00:28:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196001 conditions, 98786 events. 73742/98786 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 3173. Compared 645659 event pairs, 57038 based on Foata normal form. 0/95326 useless extension candidates. Maximal degree in co-relation 56020. Up to 91805 conditions per place. [2023-08-04 00:28:50,174 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 46 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 00:28:50,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 252 flow [2023-08-04 00:28:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:28:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:28:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-04 00:28:50,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677267373380448 [2023-08-04 00:28:50,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-04 00:28:50,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-04 00:28:50,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:28:50,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-04 00:28:50,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2023-08-04 00:28:50,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:50,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 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) [2023-08-04 00:28:50,178 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 482 transitions. [2023-08-04 00:28:50,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 252 flow [2023-08-04 00:28:50,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:28:50,180 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-04 00:28:50,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-04 00:28:50,180 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 00:28:50,180 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-04 00:28:50,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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) [2023-08-04 00:28:50,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:28:50,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:28:50,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:28:50,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 00:28:50,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:28:50,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:28:50,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1840991210, now seen corresponding path program 1 times [2023-08-04 00:28:50,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:28:50,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017960490] [2023-08-04 00:28:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:50,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:28:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:28:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:28:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017960490] [2023-08-04 00:28:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017960490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:28:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589079532] [2023-08-04 00:28:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:28:50,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:28:50,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:28:50,441 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) [2023-08-04 00:28:50,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:28:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:28:50,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:28:50,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:28:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:28:50,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:28:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:28:50,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589079532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:28:50,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:28:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 00:28:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136809215] [2023-08-04 00:28:50,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:28:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:28:50,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:28:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:28:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:28:50,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 00:28:50,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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) [2023-08-04 00:28:50,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:28:50,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 00:28:50,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:29:00,265 INFO L124 PetriNetUnfolderBase]: 57928/76769 cut-off events. [2023-08-04 00:29:00,265 INFO L125 PetriNetUnfolderBase]: For 5676/5676 co-relation queries the response was YES. [2023-08-04 00:29:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157154 conditions, 76769 events. 57928/76769 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 2537. Compared 470264 event pairs, 36996 based on Foata normal form. 3/76312 useless extension candidates. Maximal degree in co-relation 55854. Up to 73594 conditions per place. [2023-08-04 00:29:00,588 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 00:29:00,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 244 flow [2023-08-04 00:29:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:29:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:29:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 00:29:00,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468197879858657 [2023-08-04 00:29:00,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 00:29:00,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 00:29:00,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:29:00,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 00:29:00,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 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) [2023-08-04 00:29:00,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:00,592 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:00,592 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 619 transitions. [2023-08-04 00:29:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 244 flow [2023-08-04 00:29:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:29:00,595 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-04 00:29:00,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 00:29:00,595 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 00:29:00,595 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-04 00:29:00,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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) [2023-08-04 00:29:00,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:29:00,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:29:00,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:29:00,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:29:00,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:29:00,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:29:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 831474245, now seen corresponding path program 1 times [2023-08-04 00:29:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:29:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179965021] [2023-08-04 00:29:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:29:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:29:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:29:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179965021] [2023-08-04 00:29:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179965021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:29:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86143190] [2023-08-04 00:29:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:00,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:29:00,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:29:00,847 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) [2023-08-04 00:29:00,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:29:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:00,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:29:00,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:29:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:29:00,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:29:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:29:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86143190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:29:00,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:29:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:29:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047192371] [2023-08-04 00:29:00,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:29:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:29:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:29:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:29:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:29:00,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 00:29:00,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 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) [2023-08-04 00:29:00,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:29:00,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 00:29:00,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:29:08,517 INFO L124 PetriNetUnfolderBase]: 45550/59722 cut-off events. [2023-08-04 00:29:08,517 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 00:29:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121979 conditions, 59722 events. 45550/59722 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 2150. Compared 352605 event pairs, 29614 based on Foata normal form. 27/59424 useless extension candidates. Maximal degree in co-relation 43271. Up to 56617 conditions per place. [2023-08-04 00:29:08,747 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 48 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 00:29:08,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 288 flow [2023-08-04 00:29:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:29:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:29:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-08-04 00:29:08,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553886925795053 [2023-08-04 00:29:08,749 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-08-04 00:29:08,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-08-04 00:29:08,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:29:08,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-08-04 00:29:08,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 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) [2023-08-04 00:29:08,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:08,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:08,751 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 627 transitions. [2023-08-04 00:29:08,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 288 flow [2023-08-04 00:29:08,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 281 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:29:08,754 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-04 00:29:08,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-04 00:29:08,755 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 00:29:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-04 00:29:08,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 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) [2023-08-04 00:29:08,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:29:08,755 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] [2023-08-04 00:29:08,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 00:29:08,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:29:08,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:29:08,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:29:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash -120243611, now seen corresponding path program 1 times [2023-08-04 00:29:08,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:29:08,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994242639] [2023-08-04 00:29:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:29:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:29:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:29:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994242639] [2023-08-04 00:29:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994242639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:29:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101927444] [2023-08-04 00:29:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:09,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:29:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:29:09,002 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:29:09,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:29:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:09,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:29:09,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:29:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:29:09,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:29:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:29:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101927444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:29:09,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:29:09,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:29:09,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555294609] [2023-08-04 00:29:09,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:29:09,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:29:09,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:29:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:29:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:29:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 00:29:09,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 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) [2023-08-04 00:29:09,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:29:09,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 00:29:09,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:29:15,665 INFO L124 PetriNetUnfolderBase]: 40906/52666 cut-off events. [2023-08-04 00:29:15,665 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 00:29:15,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108883 conditions, 52666 events. 40906/52666 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 291604 event pairs, 18820 based on Foata normal form. 324/52989 useless extension candidates. Maximal degree in co-relation 38600. Up to 34339 conditions per place. [2023-08-04 00:29:15,886 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 59 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 00:29:15,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 339 flow [2023-08-04 00:29:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:29:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:29:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 638 transitions. [2023-08-04 00:29:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636042402826855 [2023-08-04 00:29:15,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 638 transitions. [2023-08-04 00:29:15,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 638 transitions. [2023-08-04 00:29:15,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:29:15,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 638 transitions. [2023-08-04 00:29:15,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 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) [2023-08-04 00:29:15,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:15,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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) [2023-08-04 00:29:15,896 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 159 flow. Second operand 4 states and 638 transitions. [2023-08-04 00:29:15,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 339 flow [2023-08-04 00:29:15,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 332 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:29:15,898 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 166 flow [2023-08-04 00:29:15,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2023-08-04 00:29:15,899 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 00:29:15,899 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 166 flow [2023-08-04 00:29:15,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 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) [2023-08-04 00:29:15,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:29:15,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:29:15,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 00:29:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:29:16,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:29:16,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:29:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash -934369433, now seen corresponding path program 1 times [2023-08-04 00:29:16,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:29:16,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533496892] [2023-08-04 00:29:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:29:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:29:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:29:16,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533496892] [2023-08-04 00:29:16,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533496892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:29:16,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:29:16,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:29:16,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695177240] [2023-08-04 00:29:16,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:29:16,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:29:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:29:16,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:29:16,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:29:16,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 00:29:16,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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) [2023-08-04 00:29:16,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:29:16,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 00:29:16,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:29:22,925 INFO L124 PetriNetUnfolderBase]: 38935/51748 cut-off events. [2023-08-04 00:29:22,925 INFO L125 PetriNetUnfolderBase]: For 15478/15478 co-relation queries the response was YES. [2023-08-04 00:29:23,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110440 conditions, 51748 events. 38935/51748 cut-off events. For 15478/15478 co-relation queries the response was YES. Maximal size of possible extension queue 2007. Compared 309847 event pairs, 8020 based on Foata normal form. 1296/53043 useless extension candidates. Maximal degree in co-relation 39083. Up to 40258 conditions per place. [2023-08-04 00:29:23,128 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 49 selfloop transitions, 3 changer transitions 25/86 dead transitions. [2023-08-04 00:29:23,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 86 transitions, 424 flow [2023-08-04 00:29:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:29:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:29:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-04 00:29:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653710247349824 [2023-08-04 00:29:23,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-04 00:29:23,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-04 00:29:23,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:29:23,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-04 00:29:23,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 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) [2023-08-04 00:29:23,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 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) [2023-08-04 00:29:23,132 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 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) [2023-08-04 00:29:23,133 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 166 flow. Second operand 5 states and 800 transitions. [2023-08-04 00:29:23,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 86 transitions, 424 flow [2023-08-04 00:29:23,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 412 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:29:23,146 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 186 flow [2023-08-04 00:29:23,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2023-08-04 00:29:23,146 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-04 00:29:23,146 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 186 flow [2023-08-04 00:29:23,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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) [2023-08-04 00:29:23,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:29:23,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:29:23,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:29:23,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:29:23,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:29:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1099316144, now seen corresponding path program 1 times [2023-08-04 00:29:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:29:23,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396176757] [2023-08-04 00:29:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:29:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:29:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:29:23,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396176757] [2023-08-04 00:29:23,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396176757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:29:23,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:29:23,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:29:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833362313] [2023-08-04 00:29:23,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:29:23,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:29:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:29:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:29:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:29:23,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 00:29:23,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 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) [2023-08-04 00:29:23,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:29:23,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 00:29:23,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:29:42,045 INFO L124 PetriNetUnfolderBase]: 112858/144949 cut-off events. [2023-08-04 00:29:42,045 INFO L125 PetriNetUnfolderBase]: For 59884/59884 co-relation queries the response was YES. [2023-08-04 00:29:42,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336337 conditions, 144949 events. 112858/144949 cut-off events. For 59884/59884 co-relation queries the response was YES. Maximal size of possible extension queue 5091. Compared 872929 event pairs, 24010 based on Foata normal form. 3375/148260 useless extension candidates. Maximal degree in co-relation 309322. Up to 72118 conditions per place. [2023-08-04 00:29:42,701 INFO L140 encePairwiseOnDemand]: 276/283 looper letters, 79 selfloop transitions, 7 changer transitions 46/139 dead transitions. [2023-08-04 00:29:42,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 733 flow [2023-08-04 00:29:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 00:29:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 00:29:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1105 transitions. [2023-08-04 00:29:42,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557799091367996 [2023-08-04 00:29:42,703 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1105 transitions. [2023-08-04 00:29:42,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1105 transitions. [2023-08-04 00:29:42,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:29:42,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1105 transitions. [2023-08-04 00:29:42,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.85714285714286) internal successors, (1105), 7 states have internal predecessors, (1105), 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) [2023-08-04 00:29:42,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 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) [2023-08-04 00:29:42,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 283.0) internal successors, (2264), 8 states have internal predecessors, (2264), 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) [2023-08-04 00:29:42,707 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 186 flow. Second operand 7 states and 1105 transitions. [2023-08-04 00:29:42,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 733 flow [2023-08-04 00:29:43,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 726 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:29:43,371 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 258 flow [2023-08-04 00:29:43,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2023-08-04 00:29:43,371 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2023-08-04 00:29:43,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 258 flow [2023-08-04 00:29:43,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 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) [2023-08-04 00:29:43,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:29:43,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:29:43,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:29:43,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:29:43,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:29:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 383021441, now seen corresponding path program 1 times [2023-08-04 00:29:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:29:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876803767] [2023-08-04 00:29:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:29:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:29:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:29:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 00:29:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:29:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876803767] [2023-08-04 00:29:43,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876803767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:29:43,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:29:43,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:29:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81305893] [2023-08-04 00:29:43,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:29:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:29:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:29:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:29:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:29:43,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 00:29:43,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 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) [2023-08-04 00:29:43,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:29:43,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 00:29:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:30:06,425 INFO L124 PetriNetUnfolderBase]: 130567/166087 cut-off events. [2023-08-04 00:30:06,425 INFO L125 PetriNetUnfolderBase]: For 193120/193120 co-relation queries the response was YES. [2023-08-04 00:30:06,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445092 conditions, 166087 events. 130567/166087 cut-off events. For 193120/193120 co-relation queries the response was YES. Maximal size of possible extension queue 5846. Compared 1007651 event pairs, 64141 based on Foata normal form. 2565/168435 useless extension candidates. Maximal degree in co-relation 409541. Up to 101971 conditions per place. [2023-08-04 00:30:07,359 INFO L140 encePairwiseOnDemand]: 277/283 looper letters, 73 selfloop transitions, 6 changer transitions 33/119 dead transitions. [2023-08-04 00:30:07,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 764 flow [2023-08-04 00:30:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:30:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:30:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 812 transitions. [2023-08-04 00:30:07,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738515901060071 [2023-08-04 00:30:07,361 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 812 transitions. [2023-08-04 00:30:07,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 812 transitions. [2023-08-04 00:30:07,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:30:07,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 812 transitions. [2023-08-04 00:30:07,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 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) [2023-08-04 00:30:07,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 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) [2023-08-04 00:30:07,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 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) [2023-08-04 00:30:07,364 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 258 flow. Second operand 5 states and 812 transitions. [2023-08-04 00:30:07,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 764 flow [2023-08-04 00:30:10,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 119 transitions, 723 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-04 00:30:10,026 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 303 flow [2023-08-04 00:30:10,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2023-08-04 00:30:10,027 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2023-08-04 00:30:10,027 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 303 flow [2023-08-04 00:30:10,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 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) [2023-08-04 00:30:10,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:30:10,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:30:10,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:30:10,027 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:30:10,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:30:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2046898604, now seen corresponding path program 1 times [2023-08-04 00:30:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:30:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373825608] [2023-08-04 00:30:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:30:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:30:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:30:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:30:10,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:30:10,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373825608] [2023-08-04 00:30:10,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373825608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:30:10,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:30:10,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:30:10,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067437875] [2023-08-04 00:30:10,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:30:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:30:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:30:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:30:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:30:10,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 00:30:10,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 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) [2023-08-04 00:30:10,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:30:10,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 00:30:10,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand