/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:06:17,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:06:17,478 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:06:17,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:06:17,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:06:17,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:06:17,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:06:17,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:06:17,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:06:17,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:06:17,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:06:17,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:06:17,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:06:17,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:06:17,498 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:06:17,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:06:17,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:06:17,499 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:06:17,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:06:17,499 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:06:17,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:06:17,500 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:06:17,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:06:17,500 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:06:17,501 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:06:17,501 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:06:17,501 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:06:17,501 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:06:17,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:06:17,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:06:17,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:06:17,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:06:17,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:06:17,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:06:17,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:06:17,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:06:17,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:06:17,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:06:17,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:06:17,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:06:17,504 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:06:17,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:06:17,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:06:17,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:06:17,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:06:17,708 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:06:17,708 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:06:17,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 07:06:18,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:06:18,997 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:06:18,998 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 07:06:19,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84519bf58/02f71b6f43e94f338b60094dc261c5fa/FLAG490d51f25 [2023-08-04 07:06:19,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84519bf58/02f71b6f43e94f338b60094dc261c5fa [2023-08-04 07:06:19,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:06:19,030 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:06:19,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:06:19,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:06:19,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:06:19,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb9b59f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19, skipping insertion in model container [2023-08-04 07:06:19,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,066 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:06:19,208 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_safe018_rmo.oepc_bound2.i[993,1006] [2023-08-04 07:06:19,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:06:19,319 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:06:19,336 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_safe018_rmo.oepc_bound2.i[993,1006] [2023-08-04 07:06:19,345 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:06:19,346 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:06:19,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:06:19,416 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:06:19,416 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:06:19,421 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:06:19,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19 WrapperNode [2023-08-04 07:06:19,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:06:19,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:06:19,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:06:19,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:06:19,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,466 INFO L138 Inliner]: procedures = 176, calls = 65, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 07:06:19,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:06:19,466 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:06:19,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:06:19,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:06:19,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:06:19,515 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:06:19,515 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:06:19,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:06:19,516 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (1/1) ... [2023-08-04 07:06:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:06:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:19,549 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 07:06:19,553 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 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:06:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:06:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:06:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:06:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:06:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:06:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:06:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:06:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:06:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:06:19,587 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 07:06:19,685 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:06:19,686 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:06:19,914 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:06:20,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:06:20,069 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:06:20,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:06:20 BoogieIcfgContainer [2023-08-04 07:06:20,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:06:20,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:06:20,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:06:20,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:06:20,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:06:19" (1/3) ... [2023-08-04 07:06:20,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198cdc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:06:20, skipping insertion in model container [2023-08-04 07:06:20,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:06:19" (2/3) ... [2023-08-04 07:06:20,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@198cdc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:06:20, skipping insertion in model container [2023-08-04 07:06:20,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:06:20" (3/3) ... [2023-08-04 07:06:20,078 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 07:06:20,083 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:06:20,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:06:20,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:06:20,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:06:20,172 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:06:20,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 07:06:20,362 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 07:06:20,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:20,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2023-08-04 07:06:20,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 07:06:20,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 129 transitions, 267 flow [2023-08-04 07:06:20,379 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:06:20,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 129 transitions, 267 flow [2023-08-04 07:06:20,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 129 transitions, 267 flow [2023-08-04 07:06:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 129 transitions, 267 flow [2023-08-04 07:06:20,431 INFO L124 PetriNetUnfolderBase]: 22/358 cut-off events. [2023-08-04 07:06:20,431 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:20,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 358 events. 22/358 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1312 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 228. Up to 16 conditions per place. [2023-08-04 07:06:20,437 INFO L119 LiptonReduction]: Number of co-enabled transitions 1626 [2023-08-04 07:06:24,857 INFO L134 LiptonReduction]: Checked pairs total: 3821 [2023-08-04 07:06:24,857 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 07:06:24,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:06:24,871 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;@612375de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:06:24,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:06:24,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:06:24,875 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2023-08-04 07:06:24,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:24,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:24,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:24,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1345840951, now seen corresponding path program 1 times [2023-08-04 07:06:24,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:24,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429161946] [2023-08-04 07:06:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:25,082 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 07:06:25,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429161946] [2023-08-04 07:06:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429161946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:25,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:06:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:06:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336538528] [2023-08-04 07:06:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:25,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:25,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:06:25,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 254 [2023-08-04 07:06:25,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 07:06:25,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:25,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 254 [2023-08-04 07:06:25,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:25,334 INFO L124 PetriNetUnfolderBase]: 836/1358 cut-off events. [2023-08-04 07:06:25,335 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 07:06:25,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1358 events. 836/1358 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6727 event pairs, 666 based on Foata normal form. 60/1271 useless extension candidates. Maximal degree in co-relation 2730. Up to 1344 conditions per place. [2023-08-04 07:06:25,345 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 23 selfloop transitions, 2 changer transitions 2/29 dead transitions. [2023-08-04 07:06:25,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 121 flow [2023-08-04 07:06:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-04 07:06:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380577427821522 [2023-08-04 07:06:25,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:25,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 07:06:25,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:25,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:25,377 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 63 flow. Second operand 3 states and 410 transitions. [2023-08-04 07:06:25,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 121 flow [2023-08-04 07:06:25,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:06:25,380 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 67 flow [2023-08-04 07:06:25,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-04 07:06:25,385 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-04 07:06:25,386 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 67 flow [2023-08-04 07:06:25,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 07:06:25,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:25,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:06:25,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:25,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -316490301, now seen corresponding path program 1 times [2023-08-04 07:06:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284184693] [2023-08-04 07:06:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:25,537 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 07:06:25,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:25,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284184693] [2023-08-04 07:06:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284184693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957188074] [2023-08-04 07:06:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:25,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:25,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:25,553 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 07:06:25,558 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 07:06:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:06:25,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:25,657 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 07:06:25,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:06:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957188074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:25,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:06:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:06:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912576548] [2023-08-04 07:06:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:25,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 254 [2023-08-04 07:06:25,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 07:06:25,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:25,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 254 [2023-08-04 07:06:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:25,839 INFO L124 PetriNetUnfolderBase]: 608/970 cut-off events. [2023-08-04 07:06:25,840 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:06:25,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 970 events. 608/970 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4266 event pairs, 382 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 1955. Up to 934 conditions per place. [2023-08-04 07:06:25,847 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 25 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 07:06:25,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 133 flow [2023-08-04 07:06:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-04 07:06:25,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380577427821522 [2023-08-04 07:06:25,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:25,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-04 07:06:25,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 07:06:25,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:25,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:25,856 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 67 flow. Second operand 3 states and 410 transitions. [2023-08-04 07:06:25,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 133 flow [2023-08-04 07:06:25,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:06:25,857 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 71 flow [2023-08-04 07:06:25,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-04 07:06:25,858 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-04 07:06:25,858 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 71 flow [2023-08-04 07:06:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 07:06:25,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:25,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:25,879 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 07:06:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:26,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:26,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1993681097, now seen corresponding path program 1 times [2023-08-04 07:06:26,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:26,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305134196] [2023-08-04 07:06:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:26,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:26,146 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 07:06:26,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305134196] [2023-08-04 07:06:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305134196] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:26,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419954955] [2023-08-04 07:06:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:26,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:26,161 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 07:06:26,163 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 07:06:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:26,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:06:26,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:26,282 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 07:06:26,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:06:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419954955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:26,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:06:26,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:06:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562483158] [2023-08-04 07:06:26,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:26,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 254 [2023-08-04 07:06:26,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 07:06:26,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:26,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 254 [2023-08-04 07:06:26,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:26,423 INFO L124 PetriNetUnfolderBase]: 560/884 cut-off events. [2023-08-04 07:06:26,424 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 07:06:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 884 events. 560/884 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3795 event pairs, 326 based on Foata normal form. 0/847 useless extension candidates. Maximal degree in co-relation 1812. Up to 749 conditions per place. [2023-08-04 07:06:26,428 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 28 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:06:26,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 149 flow [2023-08-04 07:06:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-04 07:06:26,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541994750656168 [2023-08-04 07:06:26,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-04 07:06:26,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-04 07:06:26,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:26,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-04 07:06:26,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 07:06:26,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:26,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states 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 07:06:26,432 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 71 flow. Second operand 3 states and 413 transitions. [2023-08-04 07:06:26,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 149 flow [2023-08-04 07:06:26,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:06:26,433 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 75 flow [2023-08-04 07:06:26,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-04 07:06:26,434 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-04 07:06:26,434 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 75 flow [2023-08-04 07:06:26,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 07:06:26,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:26,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:26,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:06:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:06:26,639 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:26,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1434844496, now seen corresponding path program 1 times [2023-08-04 07:06:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535137248] [2023-08-04 07:06:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:26,682 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 07:06:26,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535137248] [2023-08-04 07:06:26,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535137248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:26,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507126227] [2023-08-04 07:06:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:26,683 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 07:06:26,701 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 07:06:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:26,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:06:26,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:26,818 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 07:06:26,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:06:26,832 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 07:06:26,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507126227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:06:26,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:06:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:06:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670618624] [2023-08-04 07:06:26,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:06:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:06:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:06:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:26,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 254 [2023-08-04 07:06:26,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 07:06:26,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:26,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 254 [2023-08-04 07:06:26,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:26,865 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:06:26,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:26,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:06:26,866 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:06:26,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:06:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:06:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:06:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-08-04 07:06:26,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059055118110236 [2023-08-04 07:06:26,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-08-04 07:06:26,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-08-04 07:06:26,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:26,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-08-04 07:06:26,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 07:06:26,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 07:06:26,870 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 07:06:26,870 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 75 flow. Second operand 4 states and 514 transitions. [2023-08-04 07:06:26,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:06:26,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:06:26,870 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:06:26,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 07:06:26,871 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -15 predicate places. [2023-08-04 07:06:26,871 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:06:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states 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 07:06:26,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:06:26,887 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 07:06:27,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:27,079 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:06:27,081 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:06:27,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 07:06:27,118 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 07:06:27,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:27,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2023-08-04 07:06:27,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 07:06:27,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 115 transitions, 245 flow [2023-08-04 07:06:27,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:06:27,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 07:06:27,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 07:06:27,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 115 transitions, 245 flow [2023-08-04 07:06:27,131 INFO L124 PetriNetUnfolderBase]: 6/229 cut-off events. [2023-08-04 07:06:27,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 229 events. 6/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 602 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-08-04 07:06:27,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 1084 [2023-08-04 07:06:30,795 INFO L134 LiptonReduction]: Checked pairs total: 2336 [2023-08-04 07:06:30,795 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 07:06:30,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:06:30,803 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;@612375de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:06:30,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:06:30,811 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:06:30,812 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 07:06:30,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:06:30,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:30,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:06:30,812 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 07:06:30,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1665392629, now seen corresponding path program 1 times [2023-08-04 07:06:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314663301] [2023-08-04 07:06:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:30,875 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 07:06:30,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:30,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314663301] [2023-08-04 07:06:30,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314663301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:30,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:06:30,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:06:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801975584] [2023-08-04 07:06:30,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:06:30,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 241 [2023-08-04 07:06:30,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 07:06:30,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:30,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 241 [2023-08-04 07:06:30,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:30,963 INFO L124 PetriNetUnfolderBase]: 200/382 cut-off events. [2023-08-04 07:06:30,963 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 07:06:30,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 382 events. 200/382 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1633 event pairs, 150 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 777. Up to 348 conditions per place. [2023-08-04 07:06:30,965 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 19 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 07:06:30,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 109 flow [2023-08-04 07:06:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 07:06:30,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573997233748271 [2023-08-04 07:06:30,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 07:06:30,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 07:06:30,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:30,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 07:06:30,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 07:06:30,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:30,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:30,972 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 403 transitions. [2023-08-04 07:06:30,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 109 flow [2023-08-04 07:06:30,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:06:30,972 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 07:06:30,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 07:06:30,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 07:06:30,975 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 07:06:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 07:06:30,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:30,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:06:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:06:30,976 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 07:06:30,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1657885578, now seen corresponding path program 1 times [2023-08-04 07:06:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:30,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934538784] [2023-08-04 07:06:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:06:31,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:06:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:06:31,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:06:31,044 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:06:31,044 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:06:31,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:06:31,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:06:31,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:06:31,044 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:06:31,045 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:06:31,045 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:06:31,045 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:06:31,074 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:06:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 07:06:31,186 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 07:06:31,186 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:06:31,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9300 event pairs, 0 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 07:06:31,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 07:06:31,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 150 transitions, 324 flow [2023-08-04 07:06:31,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:06:31,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 07:06:31,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 07:06:31,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 150 transitions, 324 flow [2023-08-04 07:06:31,253 INFO L124 PetriNetUnfolderBase]: 66/1043 cut-off events. [2023-08-04 07:06:31,253 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:06:31,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1043 events. 66/1043 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6407 event pairs, 0 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 775. Up to 54 conditions per place. [2023-08-04 07:06:31,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 4004 [2023-08-04 07:06:36,191 INFO L134 LiptonReduction]: Checked pairs total: 12043 [2023-08-04 07:06:36,191 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 07:06:36,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:06:36,193 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;@612375de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:06:36,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:06:36,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:06:36,197 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 07:06:36,197 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:06:36,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:36,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:36,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2042628437, now seen corresponding path program 1 times [2023-08-04 07:06:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149012525] [2023-08-04 07:06:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:36,251 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 07:06:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149012525] [2023-08-04 07:06:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149012525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:36,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:06:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:06:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722803711] [2023-08-04 07:06:36,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:06:36,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 07:06:36,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:36,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:36,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 07:06:36,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:48,311 INFO L124 PetriNetUnfolderBase]: 90780/122005 cut-off events. [2023-08-04 07:06:48,311 INFO L125 PetriNetUnfolderBase]: For 1965/1965 co-relation queries the response was YES. [2023-08-04 07:06:48,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241666 conditions, 122005 events. 90780/122005 cut-off events. For 1965/1965 co-relation queries the response was YES. Maximal size of possible extension queue 3503. Compared 794560 event pairs, 73086 based on Foata normal form. 3276/117151 useless extension candidates. Maximal degree in co-relation 68753. Up to 117322 conditions per place. [2023-08-04 07:06:49,201 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 35 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 07:06:49,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 190 flow [2023-08-04 07:06:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 07:06:49,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563463819691578 [2023-08-04 07:06:49,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 07:06:49,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 07:06:49,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:49,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 07:06:49,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 07:06:49,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:06:49,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:06:49,208 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 108 flow. Second operand 3 states and 469 transitions. [2023-08-04 07:06:49,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 190 flow [2023-08-04 07:06:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:06:49,211 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 116 flow [2023-08-04 07:06:49,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-04 07:06:49,212 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-04 07:06:49,212 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 116 flow [2023-08-04 07:06:49,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:49,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:49,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:49,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:06:49,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:49,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1646532338, now seen corresponding path program 1 times [2023-08-04 07:06:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695861356] [2023-08-04 07:06:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:49,258 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 07:06:49,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695861356] [2023-08-04 07:06:49,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695861356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:49,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928445444] [2023-08-04 07:06:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:49,272 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 07:06:49,286 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 07:06:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:49,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:06:49,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:49,385 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 07:06:49,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:06:49,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928445444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:49,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:06:49,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:06:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802928400] [2023-08-04 07:06:49,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:49,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:06:49,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:49,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:06:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:06:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 07:06:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:49,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 07:06:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:59,279 INFO L124 PetriNetUnfolderBase]: 75086/101753 cut-off events. [2023-08-04 07:06:59,279 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2023-08-04 07:06:59,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200554 conditions, 101753 events. 75086/101753 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 3032. Compared 660821 event pairs, 60736 based on Foata normal form. 0/98177 useless extension candidates. Maximal degree in co-relation 200517. Up to 96475 conditions per place. [2023-08-04 07:06:59,865 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 07:06:59,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 216 flow [2023-08-04 07:06:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:06:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:06:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 07:06:59,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587188612099644 [2023-08-04 07:06:59,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 07:06:59,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 07:06:59,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:59,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 07:06:59,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:59,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:06:59,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:06:59,870 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 116 flow. Second operand 3 states and 471 transitions. [2023-08-04 07:06:59,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 216 flow [2023-08-04 07:06:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:06:59,874 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 126 flow [2023-08-04 07:06:59,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-04 07:06:59,875 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 07:06:59,875 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 126 flow [2023-08-04 07:06:59,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:59,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:59,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:06:59,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:07:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:00,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:00,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1291917329, now seen corresponding path program 1 times [2023-08-04 07:07:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394641827] [2023-08-04 07:07:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:00,132 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 07:07:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394641827] [2023-08-04 07:07:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394641827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416709199] [2023-08-04 07:07:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:00,147 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 07:07:00,148 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 07:07:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:00,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:07:00,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:00,250 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 07:07:00,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:07:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416709199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:00,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:07:00,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:07:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110139206] [2023-08-04 07:07:00,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:00,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:07:00,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:07:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:00,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 07:07:00,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 126 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 07:07:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:00,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 07:07:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:10,395 INFO L124 PetriNetUnfolderBase]: 73742/98498 cut-off events. [2023-08-04 07:07:10,395 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 07:07:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195713 conditions, 98498 events. 73742/98498 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 3008. Compared 623219 event pairs, 57038 based on Foata normal form. 0/94883 useless extension candidates. Maximal degree in co-relation 55924. Up to 91805 conditions per place. [2023-08-04 07:07:10,918 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 07:07:10,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 248 flow [2023-08-04 07:07:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:07:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:07:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 07:07:10,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564650059311981 [2023-08-04 07:07:10,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 07:07:10,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 07:07:10,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:10,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 07:07:10,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 07:07:10,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:07:10,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:07:10,923 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 126 flow. Second operand 3 states and 476 transitions. [2023-08-04 07:07:10,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 248 flow [2023-08-04 07:07:10,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:07:10,927 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 136 flow [2023-08-04 07:07:10,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-04 07:07:10,928 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 07:07:10,928 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 136 flow [2023-08-04 07:07:10,928 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 07:07:10,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:10,928 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 07:07:10,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:07:11,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:11,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:11,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -978271226, now seen corresponding path program 1 times [2023-08-04 07:07:11,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:11,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844620831] [2023-08-04 07:07:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:11,178 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 07:07:11,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844620831] [2023-08-04 07:07:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844620831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582012768] [2023-08-04 07:07:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:11,180 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 07:07:11,219 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 07:07:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:11,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:07:11,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:11,304 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 07:07:11,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:07:11,317 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 07:07:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582012768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:07:11,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:07:11,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:07:11,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012556010] [2023-08-04 07:07:11,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:07:11,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:07:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:07:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:11,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 07:07:11,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 07:07:11,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:11,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 07:07:11,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:19,382 INFO L124 PetriNetUnfolderBase]: 57928/76580 cut-off events. [2023-08-04 07:07:19,383 INFO L125 PetriNetUnfolderBase]: For 5757/5757 co-relation queries the response was YES. [2023-08-04 07:07:19,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156965 conditions, 76580 events. 57928/76580 cut-off events. For 5757/5757 co-relation queries the response was YES. Maximal size of possible extension queue 2443. Compared 458189 event pairs, 36996 based on Foata normal form. 3/76034 useless extension candidates. Maximal degree in co-relation 55791. Up to 73594 conditions per place. [2023-08-04 07:07:19,864 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 40 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-04 07:07:19,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 240 flow [2023-08-04 07:07:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 07:07:19,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435943060498221 [2023-08-04 07:07:19,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 07:07:19,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 07:07:19,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:19,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 07:07:19,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:19,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:19,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:19,879 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 136 flow. Second operand 4 states and 611 transitions. [2023-08-04 07:07:19,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 240 flow [2023-08-04 07:07:19,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:07:19,895 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 148 flow [2023-08-04 07:07:19,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 07:07:19,909 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 07:07:19,909 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 148 flow [2023-08-04 07:07:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 07:07:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:19,910 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 07:07:19,915 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 07:07:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:20,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:20,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1001331760, now seen corresponding path program 1 times [2023-08-04 07:07:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:20,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860214903] [2023-08-04 07:07:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:20,183 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 07:07:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860214903] [2023-08-04 07:07:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860214903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361176356] [2023-08-04 07:07:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:20,185 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 07:07:20,212 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 07:07:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:20,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:07:20,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:20,339 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 07:07:20,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:07:20,356 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 07:07:20,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361176356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:07:20,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:07:20,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:07:20,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923727501] [2023-08-04 07:07:20,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:07:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:07:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:07:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:20,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 07:07:20,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 07:07:20,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:20,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 07:07:20,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:26,716 INFO L124 PetriNetUnfolderBase]: 45550/59659 cut-off events. [2023-08-04 07:07:26,716 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 07:07:26,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121916 conditions, 59659 events. 45550/59659 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 2100. Compared 339377 event pairs, 29614 based on Foata normal form. 27/59272 useless extension candidates. Maximal degree in co-relation 43250. Up to 56617 conditions per place. [2023-08-04 07:07:27,098 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 48 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-08-04 07:07:27,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 284 flow [2023-08-04 07:07:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 07:07:27,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550711743772242 [2023-08-04 07:07:27,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 07:07:27,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 07:07:27,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:27,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 07:07:27,114 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 07:07:27,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:27,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:27,116 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 148 flow. Second operand 4 states and 619 transitions. [2023-08-04 07:07:27,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 284 flow [2023-08-04 07:07:27,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 277 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:07:27,121 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 155 flow [2023-08-04 07:07:27,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2023-08-04 07:07:27,122 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 07:07:27,122 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 155 flow [2023-08-04 07:07:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 07:07:27,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:27,122 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 07:07:27,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 07:07:27,328 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 07:07:27,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:27,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash -412016500, now seen corresponding path program 1 times [2023-08-04 07:07:27,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:27,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483229600] [2023-08-04 07:07:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:27,380 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 07:07:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483229600] [2023-08-04 07:07:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483229600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697263756] [2023-08-04 07:07:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:27,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:27,397 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 07:07:27,409 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 07:07:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:27,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:07:27,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:27,527 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 07:07:27,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:07:27,540 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 07:07:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697263756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:07:27,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:07:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:07:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839858131] [2023-08-04 07:07:27,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:07:27,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:07:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:07:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 07:07:27,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 07:07:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:27,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 07:07:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:33,206 INFO L124 PetriNetUnfolderBase]: 40906/52585 cut-off events. [2023-08-04 07:07:33,206 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 07:07:33,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108802 conditions, 52585 events. 40906/52585 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 283568 event pairs, 18820 based on Foata normal form. 324/52819 useless extension candidates. Maximal degree in co-relation 38573. Up to 34339 conditions per place. [2023-08-04 07:07:33,525 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 59 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 07:07:33,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 335 flow [2023-08-04 07:07:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-04 07:07:33,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604982206405694 [2023-08-04 07:07:33,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-04 07:07:33,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-04 07:07:33,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:33,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-04 07:07:33,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 07:07:33,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:33,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 07:07:33,530 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 155 flow. Second operand 4 states and 630 transitions. [2023-08-04 07:07:33,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 335 flow [2023-08-04 07:07:33,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 328 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:07:33,534 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 162 flow [2023-08-04 07:07:33,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-08-04 07:07:33,535 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 07:07:33,535 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 162 flow [2023-08-04 07:07:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 07:07:33,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:33,535 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 07:07:33,542 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 07:07:33,741 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 07:07:33,742 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:33,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1009671836, now seen corresponding path program 1 times [2023-08-04 07:07:33,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:33,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448933237] [2023-08-04 07:07:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:33,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:34,016 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 07:07:34,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:34,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448933237] [2023-08-04 07:07:34,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448933237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:34,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:34,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:07:34,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347922241] [2023-08-04 07:07:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:07:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:07:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:07:34,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 281 [2023-08-04 07:07:34,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:34,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:34,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 281 [2023-08-04 07:07:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:39,898 INFO L124 PetriNetUnfolderBase]: 38362/50446 cut-off events. [2023-08-04 07:07:39,898 INFO L125 PetriNetUnfolderBase]: For 14674/14674 co-relation queries the response was YES. [2023-08-04 07:07:40,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108439 conditions, 50446 events. 38362/50446 cut-off events. For 14674/14674 co-relation queries the response was YES. Maximal size of possible extension queue 1805. Compared 284701 event pairs, 20046 based on Foata normal form. 1296/51728 useless extension candidates. Maximal degree in co-relation 108363. Up to 40521 conditions per place. [2023-08-04 07:07:40,164 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 63 selfloop transitions, 3 changer transitions 27/100 dead transitions. [2023-08-04 07:07:40,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 532 flow [2023-08-04 07:07:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:07:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:07:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2023-08-04 07:07:40,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829181494661921 [2023-08-04 07:07:40,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2023-08-04 07:07:40,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2023-08-04 07:07:40,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:40,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2023-08-04 07:07:40,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 07:07:40,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 07:07:40,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 07:07:40,170 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 162 flow. Second operand 5 states and 819 transitions. [2023-08-04 07:07:40,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 532 flow [2023-08-04 07:07:40,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 518 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:07:40,187 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 182 flow [2023-08-04 07:07:40,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-08-04 07:07:40,188 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-04 07:07:40,188 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 182 flow [2023-08-04 07:07:40,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:40,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:40,188 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 07:07:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:07:40,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:40,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2000549171, now seen corresponding path program 1 times [2023-08-04 07:07:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035507453] [2023-08-04 07:07:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:40,304 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 07:07:40,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035507453] [2023-08-04 07:07:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035507453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:40,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:07:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766373158] [2023-08-04 07:07:40,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:40,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:07:40,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:07:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:07:40,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 07:07:40,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 182 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 07:07:40,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:40,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 07:07:40,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:45,453 INFO L124 PetriNetUnfolderBase]: 37078/49360 cut-off events. [2023-08-04 07:07:45,453 INFO L125 PetriNetUnfolderBase]: For 28244/28244 co-relation queries the response was YES. [2023-08-04 07:07:45,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118537 conditions, 49360 events. 37078/49360 cut-off events. For 28244/28244 co-relation queries the response was YES. Maximal size of possible extension queue 1857. Compared 289607 event pairs, 7400 based on Foata normal form. 1152/50502 useless extension candidates. Maximal degree in co-relation 104374. Up to 38692 conditions per place. [2023-08-04 07:07:45,790 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 53 selfloop transitions, 3 changer transitions 25/88 dead transitions. [2023-08-04 07:07:45,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 479 flow [2023-08-04 07:07:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:07:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:07:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2023-08-04 07:07:45,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622775800711743 [2023-08-04 07:07:45,795 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2023-08-04 07:07:45,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2023-08-04 07:07:45,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:45,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2023-08-04 07:07:45,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 07:07:45,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 07:07:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 07:07:45,800 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 182 flow. Second operand 5 states and 790 transitions. [2023-08-04 07:07:45,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 479 flow [2023-08-04 07:07:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 472 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 07:07:46,067 INFO L231 Difference]: Finished difference. Result has 75 places, 47 transitions, 204 flow [2023-08-04 07:07:46,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=204, PETRI_PLACES=75, PETRI_TRANSITIONS=47} [2023-08-04 07:07:46,068 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2023-08-04 07:07:46,068 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 47 transitions, 204 flow [2023-08-04 07:07:46,068 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 07:07:46,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:46,068 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 07:07:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 07:07:46,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:46,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash 407606528, now seen corresponding path program 1 times [2023-08-04 07:07:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757311610] [2023-08-04 07:07:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:46,220 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 07:07:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757311610] [2023-08-04 07:07:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757311610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:07:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:07:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:07:46,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237550459] [2023-08-04 07:07:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:07:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:07:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:07:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:07:46,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 07:07:46,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 47 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 07:07:46,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:46,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 07:07:46,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:54,709 INFO L124 PetriNetUnfolderBase]: 56850/74016 cut-off events. [2023-08-04 07:07:54,709 INFO L125 PetriNetUnfolderBase]: For 59003/59003 co-relation queries the response was YES. [2023-08-04 07:07:55,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192225 conditions, 74016 events. 56850/74016 cut-off events. For 59003/59003 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 438565 event pairs, 6891 based on Foata normal form. 1656/75563 useless extension candidates. Maximal degree in co-relation 178064. Up to 35547 conditions per place. [2023-08-04 07:07:55,181 INFO L140 encePairwiseOnDemand]: 274/281 looper letters, 81 selfloop transitions, 7 changer transitions 42/137 dead transitions. [2023-08-04 07:07:55,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 137 transitions, 795 flow [2023-08-04 07:07:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 07:07:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 07:07:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1097 transitions. [2023-08-04 07:07:55,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5577020843924758 [2023-08-04 07:07:55,184 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1097 transitions. [2023-08-04 07:07:55,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1097 transitions. [2023-08-04 07:07:55,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:55,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1097 transitions. [2023-08-04 07:07:55,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.71428571428572) internal successors, (1097), 7 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states 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 07:07:55,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 07:07:55,188 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 07:07:55,188 INFO L175 Difference]: Start difference. First operand has 75 places, 47 transitions, 204 flow. Second operand 7 states and 1097 transitions. [2023-08-04 07:07:55,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 137 transitions, 795 flow [2023-08-04 07:07:55,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 137 transitions, 788 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 07:07:55,415 INFO L231 Difference]: Finished difference. Result has 82 places, 53 transitions, 276 flow [2023-08-04 07:07:55,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=71, 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=276, PETRI_PLACES=82, PETRI_TRANSITIONS=53} [2023-08-04 07:07:55,415 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2023-08-04 07:07:55,415 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 53 transitions, 276 flow [2023-08-04 07:07:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states 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 07:07:55,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:07:55,416 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 07:07:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:07:55,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:07:55,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:07:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash 472317640, now seen corresponding path program 1 times [2023-08-04 07:07:55,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:07:55,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600225926] [2023-08-04 07:07:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:55,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:07:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:07:56,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:07:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600225926] [2023-08-04 07:07:56,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600225926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:07:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646783939] [2023-08-04 07:07:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:07:56,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:07:56,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:07:56,750 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 07:07:56,793 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 07:07:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:07:56,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-04 07:07:56,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:07:57,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-04 07:07:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:07:57,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:07:57,486 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:07:57,487 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 133 [2023-08-04 07:07:58,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 97 [2023-08-04 07:07:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:07:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646783939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:07:58,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:07:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3, 5] total 16 [2023-08-04 07:07:58,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383362764] [2023-08-04 07:07:58,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:07:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 07:07:58,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:07:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 07:07:58,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-04 07:07:58,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 281 [2023-08-04 07:07:58,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 53 transitions, 276 flow. Second operand has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states 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 07:07:58,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:07:58,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 281 [2023-08-04 07:07:58,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:10,082 INFO L124 PetriNetUnfolderBase]: 72561/93700 cut-off events. [2023-08-04 07:08:10,082 INFO L125 PetriNetUnfolderBase]: For 159554/159554 co-relation queries the response was YES. [2023-08-04 07:08:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283602 conditions, 93700 events. 72561/93700 cut-off events. For 159554/159554 co-relation queries the response was YES. Maximal size of possible extension queue 2544. Compared 533918 event pairs, 10145 based on Foata normal form. 2781/96440 useless extension candidates. Maximal degree in co-relation 283513. Up to 57978 conditions per place. [2023-08-04 07:08:10,850 INFO L140 encePairwiseOnDemand]: 260/281 looper letters, 338 selfloop transitions, 96 changer transitions 33/472 dead transitions. [2023-08-04 07:08:10,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 472 transitions, 3358 flow [2023-08-04 07:08:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-04 07:08:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-04 07:08:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2956 transitions. [2023-08-04 07:08:10,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47816240698802975 [2023-08-04 07:08:10,855 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2956 transitions. [2023-08-04 07:08:10,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2956 transitions. [2023-08-04 07:08:10,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:10,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2956 transitions. [2023-08-04 07:08:10,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 134.36363636363637) internal successors, (2956), 22 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states 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 07:08:10,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 281.0) internal successors, (6463), 23 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states 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 07:08:10,868 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 281.0) internal successors, (6463), 23 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states 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 07:08:10,868 INFO L175 Difference]: Start difference. First operand has 82 places, 53 transitions, 276 flow. Second operand 22 states and 2956 transitions. [2023-08-04 07:08:10,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 472 transitions, 3358 flow [2023-08-04 07:08:11,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 472 transitions, 3201 flow, removed 54 selfloop flow, removed 3 redundant places. [2023-08-04 07:08:11,381 INFO L231 Difference]: Finished difference. Result has 117 places, 176 transitions, 1103 flow [2023-08-04 07:08:11,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1103, PETRI_PLACES=117, PETRI_TRANSITIONS=176} [2023-08-04 07:08:11,382 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2023-08-04 07:08:11,382 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 176 transitions, 1103 flow [2023-08-04 07:08:11,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states 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 07:08:11,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:11,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:11,388 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 07:08:11,587 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,SelfDestructingSolverStorable15 [2023-08-04 07:08:11,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:11,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 36669661, now seen corresponding path program 1 times [2023-08-04 07:08:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837238264] [2023-08-04 07:08:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:08:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837238264] [2023-08-04 07:08:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837238264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:08:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557068913] [2023-08-04 07:08:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:08:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:08:12,743 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 07:08:12,745 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 07:08:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:12,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-04 07:08:12,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:08:13,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-04 07:08:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:08:13,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:08:13,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:08:13,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 133 [2023-08-04 07:08:14,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 97 [2023-08-04 07:08:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:08:14,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557068913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:08:14,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:08:14,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 7] total 20 [2023-08-04 07:08:14,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289159822] [2023-08-04 07:08:14,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:08:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 07:08:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 07:08:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-04 07:08:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 281 [2023-08-04 07:08:14,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 176 transitions, 1103 flow. Second operand has 21 states, 21 states have (on average 121.66666666666667) internal successors, (2555), 21 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states 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 07:08:14,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:14,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 281 [2023-08-04 07:08:14,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:08:34,271 INFO L124 PetriNetUnfolderBase]: 94357/123314 cut-off events. [2023-08-04 07:08:34,272 INFO L125 PetriNetUnfolderBase]: For 587440/587440 co-relation queries the response was YES. [2023-08-04 07:08:35,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530992 conditions, 123314 events. 94357/123314 cut-off events. For 587440/587440 co-relation queries the response was YES. Maximal size of possible extension queue 3834. Compared 750850 event pairs, 10417 based on Foata normal form. 2123/125421 useless extension candidates. Maximal degree in co-relation 530871. Up to 63802 conditions per place. [2023-08-04 07:08:35,737 INFO L140 encePairwiseOnDemand]: 261/281 looper letters, 376 selfloop transitions, 169 changer transitions 31/581 dead transitions. [2023-08-04 07:08:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 581 transitions, 5011 flow [2023-08-04 07:08:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-04 07:08:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-04 07:08:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3308 transitions. [2023-08-04 07:08:35,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708896797153025 [2023-08-04 07:08:35,744 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3308 transitions. [2023-08-04 07:08:35,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3308 transitions. [2023-08-04 07:08:35,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:08:35,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3308 transitions. [2023-08-04 07:08:35,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 132.32) internal successors, (3308), 25 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states 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 07:08:35,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 281.0) internal successors, (7306), 26 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states 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 07:08:35,756 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 281.0) internal successors, (7306), 26 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states 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 07:08:35,756 INFO L175 Difference]: Start difference. First operand has 117 places, 176 transitions, 1103 flow. Second operand 25 states and 3308 transitions. [2023-08-04 07:08:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 581 transitions, 5011 flow [2023-08-04 07:08:49,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 581 transitions, 5007 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 07:08:49,706 INFO L231 Difference]: Finished difference. Result has 153 places, 268 transitions, 2475 flow [2023-08-04 07:08:49,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2475, PETRI_PLACES=153, PETRI_TRANSITIONS=268} [2023-08-04 07:08:49,707 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2023-08-04 07:08:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 268 transitions, 2475 flow [2023-08-04 07:08:49,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.66666666666667) internal successors, (2555), 21 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states 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 07:08:49,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:08:49,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:08:49,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:08:49,913 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,SelfDestructingSolverStorable16 [2023-08-04 07:08:49,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:08:49,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:08:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -70676947, now seen corresponding path program 2 times [2023-08-04 07:08:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:08:49,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703794523] [2023-08-04 07:08:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:08:49,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:08:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:08:50,041 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 07:08:50,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:08:50,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703794523] [2023-08-04 07:08:50,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703794523] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:08:50,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:08:50,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 07:08:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023455290] [2023-08-04 07:08:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:08:50,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:08:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:08:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:08:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:08:50,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 07:08:50,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 268 transitions, 2475 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:08:50,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:08:50,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 07:08:50,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand