/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/weaver_popl20-nonblocking-cntr.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:36:15,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:36:15,383 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:36:15,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:36:15,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:36:15,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:36:15,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:36:15,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:36:15,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:36:15,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:36:15,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:36:15,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:36:15,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:36:15,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:36:15,409 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:36:15,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:36:15,409 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:36:15,410 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:36:15,410 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:36:15,410 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:36:15,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:36:15,415 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:36:15,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:36:15,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:36:15,416 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:36:15,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:36:15,417 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:36:15,417 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:36:15,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:36:15,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:36:15,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:15,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:36:15,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:36:15,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:36:15,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:36:15,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:36:15,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:36:15,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:36:15,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:36:15,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:36:15,421 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:36:15,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:36:15,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:36:15,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:36:15,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:36:15,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:36:15,681 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:36:15,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-04 09:36:16,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:36:17,045 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:36:17,046 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-04 09:36:17,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29c565da8/91231b276101455abd517d041bfb211a/FLAGe71a4517d [2023-08-04 09:36:17,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29c565da8/91231b276101455abd517d041bfb211a [2023-08-04 09:36:17,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:36:17,067 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:36:17,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:17,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:36:17,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:36:17,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764732ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17, skipping insertion in model container [2023-08-04 09:36:17,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,093 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:36:17,223 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c[2199,2212] [2023-08-04 09:36:17,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:17,232 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:36:17,251 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-nonblocking-cntr.wvr_bound2.c[2199,2212] [2023-08-04 09:36:17,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:17,258 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:17,258 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:17,263 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:36:17,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17 WrapperNode [2023-08-04 09:36:17,263 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:17,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:17,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:36:17,265 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:36:17,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,293 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2023-08-04 09:36:17,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:17,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:36:17,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:36:17,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:36:17,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,304 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:36:17,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:36:17,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:36:17,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:36:17,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (1/1) ... [2023-08-04 09:36:17,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:17,362 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 09:36:17,381 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 09:36:17,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:36:17,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:36:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:36:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:36:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:36:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:36:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:36:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:36:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:36:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:36:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:36:17,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:36:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:36:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:36:17,406 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 09:36:17,511 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:36:17,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:36:17,763 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:36:17,791 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:36:17,791 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 09:36:17,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:17 BoogieIcfgContainer [2023-08-04 09:36:17,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:36:17,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:36:17,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:36:17,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:36:17,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:36:17" (1/3) ... [2023-08-04 09:36:17,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b8f0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:17, skipping insertion in model container [2023-08-04 09:36:17,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:17" (2/3) ... [2023-08-04 09:36:17,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b8f0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:17, skipping insertion in model container [2023-08-04 09:36:17,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:17" (3/3) ... [2023-08-04 09:36:17,803 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-nonblocking-cntr.wvr_bound2.c [2023-08-04 09:36:17,812 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:36:17,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:36:17,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:36:17,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:36:17,901 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 09:36:17,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,008 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-04 09:36:18,008 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:36:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-04 09:36:18,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:18,031 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:18,107 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-04 09:36:18,107 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:36:18,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-04 09:36:18,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-04 09:36:20,374 INFO L134 LiptonReduction]: Checked pairs total: 2590 [2023-08-04 09:36:20,374 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-04 09:36:20,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:36:20,393 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;@4f6511f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:20,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:36:20,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:20,397 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-04 09:36:20,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:20,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:20,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:36:20,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:20,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash 411801921, now seen corresponding path program 1 times [2023-08-04 09:36:20,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:20,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685766526] [2023-08-04 09:36:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:20,565 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 09:36:20,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685766526] [2023-08-04 09:36:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685766526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:20,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:20,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:36:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611623912] [2023-08-04 09:36:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:20,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:36:20,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-04 09:36:20,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 09:36:20,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-04 09:36:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:20,740 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-04 09:36:20,740 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 09:36:20,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1620 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-04 09:36:20,744 INFO L140 encePairwiseOnDemand]: 191/195 looper letters, 23 selfloop transitions, 2 changer transitions 3/32 dead transitions. [2023-08-04 09:36:20,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-04 09:36:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-04 09:36:20,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48376068376068376 [2023-08-04 09:36:20,758 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-04 09:36:20,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-04 09:36:20,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:20,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-04 09:36:20,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 09:36:20,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:20,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:20,771 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 283 transitions. [2023-08-04 09:36:20,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-04 09:36:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:20,776 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 80 flow [2023-08-04 09:36:20,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 09:36:20,780 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:36:20,781 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 80 flow [2023-08-04 09:36:20,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 09:36:20,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:20,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:36:20,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:20,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1386225823, now seen corresponding path program 1 times [2023-08-04 09:36:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675462121] [2023-08-04 09:36:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:20,845 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 09:36:20,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675462121] [2023-08-04 09:36:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675462121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33317805] [2023-08-04 09:36:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:20,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:20,849 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 09:36:20,874 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 09:36:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:20,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:20,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:20,963 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 09:36:20,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33317805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:20,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:36:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181072601] [2023-08-04 09:36:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:20,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:20,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:20,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-04 09:36:20,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 09:36:20,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:20,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-04 09:36:20,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:21,072 INFO L124 PetriNetUnfolderBase]: 257/409 cut-off events. [2023-08-04 09:36:21,073 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-04 09:36:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838 conditions, 409 events. 257/409 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1498 event pairs, 85 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 681. Up to 361 conditions per place. [2023-08-04 09:36:21,076 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 25 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 09:36:21,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 146 flow [2023-08-04 09:36:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-08-04 09:36:21,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48547008547008547 [2023-08-04 09:36:21,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:21,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:36:21,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,095 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 80 flow. Second operand 3 states and 284 transitions. [2023-08-04 09:36:21,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 146 flow [2023-08-04 09:36:21,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:36:21,097 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 78 flow [2023-08-04 09:36:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-04 09:36:21,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-04 09:36:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 78 flow [2023-08-04 09:36:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states 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 09:36:21,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:21,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:21,108 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 09:36:21,299 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 09:36:21,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:21,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1814836078, now seen corresponding path program 1 times [2023-08-04 09:36:21,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:21,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992775057] [2023-08-04 09:36:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:21,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:21,400 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 09:36:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992775057] [2023-08-04 09:36:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992775057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802774709] [2023-08-04 09:36:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:21,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:21,406 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 09:36:21,417 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 09:36:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:21,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:21,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:21,470 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 09:36:21,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:21,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802774709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:21,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:21,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:36:21,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550694669] [2023-08-04 09:36:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:21,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-04 09:36:21,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 09:36:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-04 09:36:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:21,539 INFO L124 PetriNetUnfolderBase]: 171/284 cut-off events. [2023-08-04 09:36:21,540 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:36:21,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 284 events. 171/284 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 905 event pairs, 52 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 201. Up to 193 conditions per place. [2023-08-04 09:36:21,541 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 09:36:21,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 160 flow [2023-08-04 09:36:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-04 09:36:21,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905982905982906 [2023-08-04 09:36:21,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-04 09:36:21,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-04 09:36:21,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:21,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-04 09:36:21,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 09:36:21,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,546 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 78 flow. Second operand 3 states and 287 transitions. [2023-08-04 09:36:21,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 160 flow [2023-08-04 09:36:21,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:21,548 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 86 flow [2023-08-04 09:36:21,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-04 09:36:21,549 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-04 09:36:21,549 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 86 flow [2023-08-04 09:36:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 09:36:21,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:21,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:21,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:21,755 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 09:36:21,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:21,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash -334801890, now seen corresponding path program 1 times [2023-08-04 09:36:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:21,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406696125] [2023-08-04 09:36:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:21,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:21,838 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 09:36:21,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:21,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406696125] [2023-08-04 09:36:21,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406696125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:21,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335588536] [2023-08-04 09:36:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:21,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:21,841 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 09:36:21,841 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 09:36:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:21,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:21,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335588536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:21,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:21,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:36:21,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191767798] [2023-08-04 09:36:21,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:21,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:21,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 195 [2023-08-04 09:36:21,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 09:36:21,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:21,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 195 [2023-08-04 09:36:21,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:21,983 INFO L124 PetriNetUnfolderBase]: 162/271 cut-off events. [2023-08-04 09:36:21,984 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 09:36:21,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 271 events. 162/271 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 842 event pairs, 69 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 243. Up to 228 conditions per place. [2023-08-04 09:36:21,986 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 25 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2023-08-04 09:36:21,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 154 flow [2023-08-04 09:36:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-08-04 09:36:21,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48547008547008547 [2023-08-04 09:36:21,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:21,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-08-04 09:36:21,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 09:36:21,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 09:36:21,995 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 86 flow. Second operand 3 states and 284 transitions. [2023-08-04 09:36:21,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 154 flow [2023-08-04 09:36:21,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:21,998 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 88 flow [2023-08-04 09:36:21,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-04 09:36:22,000 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-04 09:36:22,000 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 88 flow [2023-08-04 09:36:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 09:36:22,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:22,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:22,009 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 09:36:22,206 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 09:36:22,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:22,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash 868260987, now seen corresponding path program 1 times [2023-08-04 09:36:22,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:22,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431350567] [2023-08-04 09:36:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431350567] [2023-08-04 09:36:22,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431350567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540404506] [2023-08-04 09:36:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:22,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:22,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:22,286 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 09:36:22,289 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 09:36:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:22,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:22,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:22,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:22,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540404506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:22,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:22,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 09:36:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434411240] [2023-08-04 09:36:22,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:36:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:36:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:36:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 195 [2023-08-04 09:36:22,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 09:36:22,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:22,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 195 [2023-08-04 09:36:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:22,469 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 09:36:22,469 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:36:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 19 events. 8/19 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 1 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 40. Up to 13 conditions per place. [2023-08-04 09:36:22,470 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 09:36:22,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 42 flow [2023-08-04 09:36:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-08-04 09:36:22,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44358974358974357 [2023-08-04 09:36:22,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-08-04 09:36:22,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-08-04 09:36:22,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:22,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-08-04 09:36:22,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 09:36:22,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 09:36:22,475 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states 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 09:36:22,475 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 88 flow. Second operand 4 states and 346 transitions. [2023-08-04 09:36:22,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 42 flow [2023-08-04 09:36:22,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:22,476 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 09:36:22,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=13, 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=16, PETRI_TRANSITIONS=0} [2023-08-04 09:36:22,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -13 predicate places. [2023-08-04 09:36:22,477 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 09:36:22,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 09:36:22,479 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:36:22,486 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 09:36:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:22,686 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 09:36:22,688 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:36:22,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,719 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-04 09:36:22,719 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:36:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-04 09:36:22,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:22,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 234 flow [2023-08-04 09:36:22,738 INFO L124 PetriNetUnfolderBase]: 33/243 cut-off events. [2023-08-04 09:36:22,739 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:36:22,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 33/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-04 09:36:22,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 2052 [2023-08-04 09:36:24,687 INFO L134 LiptonReduction]: Checked pairs total: 2590 [2023-08-04 09:36:24,687 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-04 09:36:24,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:36:24,690 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;@4f6511f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:24,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 09:36:24,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:24,693 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 09:36:24,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:24,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:24,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:36:24,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 09:36:24,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599538, now seen corresponding path program 1 times [2023-08-04 09:36:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482438965] [2023-08-04 09:36:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:24,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:36:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:24,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:36:24,766 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:36:24,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 09:36:24,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 09:36:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 09:36:24,767 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:36:24,769 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 09:36:24,769 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:36:24,769 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:36:24,789 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 09:36:24,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,859 INFO L124 PetriNetUnfolderBase]: 134/806 cut-off events. [2023-08-04 09:36:24,859 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:36:24,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 806 events. 134/806 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4073 event pairs, 1 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-04 09:36:24,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:24,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,866 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 129 transitions, 306 flow [2023-08-04 09:36:24,933 INFO L124 PetriNetUnfolderBase]: 134/806 cut-off events. [2023-08-04 09:36:24,933 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 09:36:24,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 806 events. 134/806 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4073 event pairs, 1 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 476. Up to 32 conditions per place. [2023-08-04 09:36:24,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 5028 [2023-08-04 09:36:27,136 INFO L134 LiptonReduction]: Checked pairs total: 7551 [2023-08-04 09:36:27,136 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 09:36:27,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:36:27,138 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;@4f6511f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:27,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:36:27,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:27,140 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 09:36:27,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:27,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:27,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 09:36:27,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:27,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash 733340120, now seen corresponding path program 1 times [2023-08-04 09:36:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425132262] [2023-08-04 09:36:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:27,184 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 09:36:27,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425132262] [2023-08-04 09:36:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425132262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:27,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:27,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:36:27,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048752695] [2023-08-04 09:36:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:27,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:27,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:36:27,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:27,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 09:36:27,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:27,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:27,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:27,986 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-04 09:36:27,986 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-08-04 09:36:27,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 47573 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-04 09:36:28,047 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 35 selfloop transitions, 2 changer transitions 2/47 dead transitions. [2023-08-04 09:36:28,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-04 09:36:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-04 09:36:28,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826086956521739 [2023-08-04 09:36:28,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-04 09:36:28,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-04 09:36:28,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:28,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-04 09:36:28,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 09:36:28,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:28,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:28,053 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 333 transitions. [2023-08-04 09:36:28,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-04 09:36:28,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:28,058 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 134 flow [2023-08-04 09:36:28,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-04 09:36:28,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 09:36:28,059 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 134 flow [2023-08-04 09:36:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 09:36:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:28,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:28,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 09:36:28,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:28,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash 423551614, now seen corresponding path program 1 times [2023-08-04 09:36:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:28,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185767289] [2023-08-04 09:36:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:28,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:28,093 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 09:36:28,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185767289] [2023-08-04 09:36:28,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185767289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790551979] [2023-08-04 09:36:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:28,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:28,095 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 09:36:28,098 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 09:36:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:28,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:28,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:28,149 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 09:36:28,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790551979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:36:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715581707] [2023-08-04 09:36:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:28,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 09:36:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:28,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:28,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:28,977 INFO L124 PetriNetUnfolderBase]: 8488/11014 cut-off events. [2023-08-04 09:36:28,977 INFO L125 PetriNetUnfolderBase]: For 859/859 co-relation queries the response was YES. [2023-08-04 09:36:28,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22260 conditions, 11014 events. 8488/11014 cut-off events. For 859/859 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49283 event pairs, 3438 based on Foata normal form. 0/6262 useless extension candidates. Maximal degree in co-relation 22230. Up to 10389 conditions per place. [2023-08-04 09:36:29,052 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 09:36:29,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 234 flow [2023-08-04 09:36:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-04 09:36:29,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48695652173913045 [2023-08-04 09:36:29,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-04 09:36:29,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-04 09:36:29,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:29,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-04 09:36:29,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 09:36:29,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:29,058 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:29,058 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 134 flow. Second operand 3 states and 336 transitions. [2023-08-04 09:36:29,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 234 flow [2023-08-04 09:36:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:29,063 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 138 flow [2023-08-04 09:36:29,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=138, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-04 09:36:29,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-04 09:36:29,065 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 138 flow [2023-08-04 09:36:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 09:36:29,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:29,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:29,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:29,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:29,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 643498485, now seen corresponding path program 1 times [2023-08-04 09:36:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683398825] [2023-08-04 09:36:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:29,327 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 09:36:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683398825] [2023-08-04 09:36:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683398825] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:29,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858733719] [2023-08-04 09:36:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:29,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:29,329 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 09:36:29,359 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 09:36:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:29,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:29,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:29,409 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 09:36:29,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858733719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:29,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:29,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:36:29,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032874739] [2023-08-04 09:36:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:29,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:29,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 09:36:29,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:29,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:29,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:30,102 INFO L124 PetriNetUnfolderBase]: 7283/9572 cut-off events. [2023-08-04 09:36:30,103 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-04 09:36:30,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19645 conditions, 9572 events. 7283/9572 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43164 event pairs, 2490 based on Foata normal form. 0/5673 useless extension candidates. Maximal degree in co-relation 6727. Up to 6828 conditions per place. [2023-08-04 09:36:30,153 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:36:30,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 274 flow [2023-08-04 09:36:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-04 09:36:30,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956521739130435 [2023-08-04 09:36:30,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-04 09:36:30,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-04 09:36:30,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:30,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-04 09:36:30,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 09:36:30,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:30,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:30,158 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 138 flow. Second operand 3 states and 342 transitions. [2023-08-04 09:36:30,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 274 flow [2023-08-04 09:36:30,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:30,161 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 148 flow [2023-08-04 09:36:30,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 09:36:30,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-04 09:36:30,164 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 148 flow [2023-08-04 09:36:30,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 09:36:30,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:30,164 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 09:36:30,172 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 09:36:30,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:30,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:30,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2002735096, now seen corresponding path program 1 times [2023-08-04 09:36:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688965006] [2023-08-04 09:36:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:30,422 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 09:36:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:30,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688965006] [2023-08-04 09:36:30,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688965006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:30,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865508230] [2023-08-04 09:36:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:30,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:30,424 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 09:36:30,424 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 09:36:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:30,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:30,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:30,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865508230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:30,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:30,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:36:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416512502] [2023-08-04 09:36:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:30,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:30,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 09:36:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:30,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:31,135 INFO L124 PetriNetUnfolderBase]: 7160/9501 cut-off events. [2023-08-04 09:36:31,135 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-08-04 09:36:31,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20205 conditions, 9501 events. 7160/9501 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 42995 event pairs, 2789 based on Foata normal form. 0/5933 useless extension candidates. Maximal degree in co-relation 7255. Up to 7262 conditions per place. [2023-08-04 09:36:31,180 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 09:36:31,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 286 flow [2023-08-04 09:36:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-04 09:36:31,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956521739130435 [2023-08-04 09:36:31,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-04 09:36:31,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-04 09:36:31,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:31,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-04 09:36:31,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 09:36:31,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:31,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 09:36:31,184 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 148 flow. Second operand 3 states and 342 transitions. [2023-08-04 09:36:31,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 286 flow [2023-08-04 09:36:31,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:31,192 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 158 flow [2023-08-04 09:36:31,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-04 09:36:31,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 09:36:31,193 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 158 flow [2023-08-04 09:36:31,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 09:36:31,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:31,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:31,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:31,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:31,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2125120572, now seen corresponding path program 1 times [2023-08-04 09:36:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:31,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511935377] [2023-08-04 09:36:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511935377] [2023-08-04 09:36:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511935377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474683995] [2023-08-04 09:36:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:31,461 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 09:36:31,462 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 09:36:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:31,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:31,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:31,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:36:31,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474683995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:31,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:36:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943057971] [2023-08-04 09:36:31,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:31,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:31,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:31,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-04 09:36:31,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 09:36:31,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:31,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-04 09:36:31,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:32,079 INFO L124 PetriNetUnfolderBase]: 6453/8554 cut-off events. [2023-08-04 09:36:32,079 INFO L125 PetriNetUnfolderBase]: For 1161/1161 co-relation queries the response was YES. [2023-08-04 09:36:32,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18389 conditions, 8554 events. 6453/8554 cut-off events. For 1161/1161 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 38355 event pairs, 1919 based on Foata normal form. 3/5405 useless extension candidates. Maximal degree in co-relation 12362. Up to 8125 conditions per place. [2023-08-04 09:36:32,115 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 09:36:32,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 264 flow [2023-08-04 09:36:32,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 431 transitions. [2023-08-04 09:36:32,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46847826086956523 [2023-08-04 09:36:32,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 431 transitions. [2023-08-04 09:36:32,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 431 transitions. [2023-08-04 09:36:32,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:32,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 431 transitions. [2023-08-04 09:36:32,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:32,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:32,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:32,120 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 158 flow. Second operand 4 states and 431 transitions. [2023-08-04 09:36:32,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 264 flow [2023-08-04 09:36:32,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:32,144 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 170 flow [2023-08-04 09:36:32,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-04 09:36:32,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2023-08-04 09:36:32,145 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 170 flow [2023-08-04 09:36:32,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 09:36:32,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:32,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:32,151 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 09:36:32,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:36:32,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:32,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1299973453, now seen corresponding path program 1 times [2023-08-04 09:36:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:32,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25716263] [2023-08-04 09:36:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:36:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25716263] [2023-08-04 09:36:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25716263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6438547] [2023-08-04 09:36:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:32,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:32,431 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 09:36:32,433 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 09:36:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:32,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:32,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:36:32,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:36:32,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6438547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:32,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:32,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:36:32,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870513942] [2023-08-04 09:36:32,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:32,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:32,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-04 09:36:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 09:36:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-04 09:36:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:33,007 INFO L124 PetriNetUnfolderBase]: 6114/8098 cut-off events. [2023-08-04 09:36:33,008 INFO L125 PetriNetUnfolderBase]: For 795/795 co-relation queries the response was YES. [2023-08-04 09:36:33,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17359 conditions, 8098 events. 6114/8098 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 36685 event pairs, 1699 based on Foata normal form. 27/5129 useless extension candidates. Maximal degree in co-relation 11398. Up to 6552 conditions per place. [2023-08-04 09:36:33,048 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 49 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 09:36:33,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 308 flow [2023-08-04 09:36:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 439 transitions. [2023-08-04 09:36:33,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771739130434783 [2023-08-04 09:36:33,050 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 439 transitions. [2023-08-04 09:36:33,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 439 transitions. [2023-08-04 09:36:33,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:33,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 439 transitions. [2023-08-04 09:36:33,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.75) internal successors, (439), 4 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 09:36:33,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:33,053 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:33,054 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 170 flow. Second operand 4 states and 439 transitions. [2023-08-04 09:36:33,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 308 flow [2023-08-04 09:36:33,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:33,069 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 175 flow [2023-08-04 09:36:33,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-08-04 09:36:33,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-04 09:36:33,071 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 175 flow [2023-08-04 09:36:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 09:36:33,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:33,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:33,079 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 09:36:33,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:33,278 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:33,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash -278655573, now seen corresponding path program 1 times [2023-08-04 09:36:33,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:33,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937843266] [2023-08-04 09:36:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:33,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:36:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:33,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937843266] [2023-08-04 09:36:33,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937843266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:33,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554586779] [2023-08-04 09:36:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:33,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:33,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:33,340 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 09:36:33,343 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 09:36:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:33,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:33,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:36:33,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 09:36:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554586779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:33,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:36:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362343686] [2023-08-04 09:36:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:33,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-04 09:36:33,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 09:36:33,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:33,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-04 09:36:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:33,896 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-04 09:36:33,896 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2023-08-04 09:36:33,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 5529 events. 4136/5529 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22993 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10556. Up to 2080 conditions per place. [2023-08-04 09:36:33,930 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 09:36:33,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 67 transitions, 346 flow [2023-08-04 09:36:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2023-08-04 09:36:33,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2023-08-04 09:36:33,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2023-08-04 09:36:33,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2023-08-04 09:36:33,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:33,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2023-08-04 09:36:33,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:33,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:33,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:33,936 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 175 flow. Second operand 4 states and 445 transitions. [2023-08-04 09:36:33,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 67 transitions, 346 flow [2023-08-04 09:36:33,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:33,946 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 186 flow [2023-08-04 09:36:33,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-04 09:36:33,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-04 09:36:33,947 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 186 flow [2023-08-04 09:36:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 09:36:33,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:33,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:33,959 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 09:36:34,153 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,SelfDestructingSolverStorable12 [2023-08-04 09:36:34,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:34,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash -629880126, now seen corresponding path program 1 times [2023-08-04 09:36:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:34,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246878406] [2023-08-04 09:36:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:36:34,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:34,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246878406] [2023-08-04 09:36:34,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246878406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:34,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779987933] [2023-08-04 09:36:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:34,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:34,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:34,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:36:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:34,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:34,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:36:34,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:36:34,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779987933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:34,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:36:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17175795] [2023-08-04 09:36:34,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:34,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:34,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-04 09:36:34,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 09:36:34,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-04 09:36:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:34,704 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-04 09:36:34,704 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-04 09:36:34,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12516 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22824 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11102. Up to 4661 conditions per place. [2023-08-04 09:36:34,734 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-04 09:36:34,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 358 flow [2023-08-04 09:36:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 445 transitions. [2023-08-04 09:36:34,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2023-08-04 09:36:34,736 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 445 transitions. [2023-08-04 09:36:34,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 445 transitions. [2023-08-04 09:36:34,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:34,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 445 transitions. [2023-08-04 09:36:34,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:34,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:34,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:34,740 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 186 flow. Second operand 4 states and 445 transitions. [2023-08-04 09:36:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 358 flow [2023-08-04 09:36:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:34,752 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 190 flow [2023-08-04 09:36:34,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-04 09:36:34,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2023-08-04 09:36:34,753 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 190 flow [2023-08-04 09:36:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 09:36:34,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:34,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:34,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:36:34,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:34,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1370564049, now seen corresponding path program 1 times [2023-08-04 09:36:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:34,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491644350] [2023-08-04 09:36:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:36:35,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:35,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491644350] [2023-08-04 09:36:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491644350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:35,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:36:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125587252] [2023-08-04 09:36:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:36:35,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:36:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:36:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-04 09:36:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 09:36:35,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:35,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-04 09:36:35,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:35,490 INFO L124 PetriNetUnfolderBase]: 4648/6201 cut-off events. [2023-08-04 09:36:35,490 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2023-08-04 09:36:35,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14123 conditions, 6201 events. 4648/6201 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26218 event pairs, 1287 based on Foata normal form. 0/4133 useless extension candidates. Maximal degree in co-relation 13934. Up to 4615 conditions per place. [2023-08-04 09:36:35,517 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 65 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-04 09:36:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 464 flow [2023-08-04 09:36:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 450 transitions. [2023-08-04 09:36:35,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2023-08-04 09:36:35,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 450 transitions. [2023-08-04 09:36:35,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 450 transitions. [2023-08-04 09:36:35,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:35,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 450 transitions. [2023-08-04 09:36:35,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.5) internal successors, (450), 4 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 09:36:35,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:35,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:35,522 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 190 flow. Second operand 4 states and 450 transitions. [2023-08-04 09:36:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 464 flow [2023-08-04 09:36:35,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 451 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:35,539 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 196 flow [2023-08-04 09:36:35,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-08-04 09:36:35,539 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2023-08-04 09:36:35,539 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 196 flow [2023-08-04 09:36:35,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 09:36:35,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:35,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 09:36:35,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:35,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1104902790, now seen corresponding path program 1 times [2023-08-04 09:36:35,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:35,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088926294] [2023-08-04 09:36:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 09:36:35,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:35,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088926294] [2023-08-04 09:36:35,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088926294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:35,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:35,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:36:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019688804] [2023-08-04 09:36:35,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:35,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:35,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:35,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-04 09:36:35,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 09:36:35,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:35,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-04 09:36:35,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:36,464 INFO L124 PetriNetUnfolderBase]: 8473/11407 cut-off events. [2023-08-04 09:36:36,464 INFO L125 PetriNetUnfolderBase]: For 6665/6665 co-relation queries the response was YES. [2023-08-04 09:36:36,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28780 conditions, 11407 events. 8473/11407 cut-off events. For 6665/6665 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 55826 event pairs, 2427 based on Foata normal form. 125/8001 useless extension candidates. Maximal degree in co-relation 28397. Up to 5612 conditions per place. [2023-08-04 09:36:36,506 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 95 selfloop transitions, 5 changer transitions 25/131 dead transitions. [2023-08-04 09:36:36,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 131 transitions, 834 flow [2023-08-04 09:36:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:36:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:36:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 578 transitions. [2023-08-04 09:36:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026086956521739 [2023-08-04 09:36:36,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 578 transitions. [2023-08-04 09:36:36,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 578 transitions. [2023-08-04 09:36:36,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:36,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 578 transitions. [2023-08-04 09:36:36,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 09:36:36,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:36:36,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:36:36,512 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 196 flow. Second operand 5 states and 578 transitions. [2023-08-04 09:36:36,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 131 transitions, 834 flow [2023-08-04 09:36:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 131 transitions, 821 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:36,535 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 227 flow [2023-08-04 09:36:36,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-08-04 09:36:36,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2023-08-04 09:36:36,536 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 227 flow [2023-08-04 09:36:36,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 09:36:36,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:36,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:36,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 09:36:36,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:36,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:36,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1525520448, now seen corresponding path program 2 times [2023-08-04 09:36:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:36,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718801773] [2023-08-04 09:36:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:36,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:36:36,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718801773] [2023-08-04 09:36:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718801773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953706323] [2023-08-04 09:36:36,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:36:36,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:36,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:36,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:36:36,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:36:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:36:36,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 09:36:36,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:36,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953706323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:36,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-04 09:36:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641323570] [2023-08-04 09:36:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:36:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:36:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:36:36,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:36,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:36,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:36,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:36,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:37,525 INFO L124 PetriNetUnfolderBase]: 8419/11393 cut-off events. [2023-08-04 09:36:37,525 INFO L125 PetriNetUnfolderBase]: For 9995/11700 co-relation queries the response was YES. [2023-08-04 09:36:37,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31935 conditions, 11393 events. 8419/11393 cut-off events. For 9995/11700 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 55749 event pairs, 3858 based on Foata normal form. 949/10028 useless extension candidates. Maximal degree in co-relation 31533. Up to 8592 conditions per place. [2023-08-04 09:36:37,574 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 67 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-08-04 09:36:37,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 496 flow [2023-08-04 09:36:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-08-04 09:36:37,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880434782608696 [2023-08-04 09:36:37,576 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-08-04 09:36:37,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-08-04 09:36:37,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:37,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-08-04 09:36:37,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 09:36:37,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:37,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:37,580 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 227 flow. Second operand 4 states and 449 transitions. [2023-08-04 09:36:37,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 496 flow [2023-08-04 09:36:37,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 492 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:37,618 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 239 flow [2023-08-04 09:36:37,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-04 09:36:37,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-04 09:36:37,618 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 239 flow [2023-08-04 09:36:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:37,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:37,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:37,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:37,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 09:36:37,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:37,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1454440378, now seen corresponding path program 1 times [2023-08-04 09:36:37,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018965772] [2023-08-04 09:36:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018965772] [2023-08-04 09:36:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018965772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944361390] [2023-08-04 09:36:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:37,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:37,931 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:37,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:36:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:36:38,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:38,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:38,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944361390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:38,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:38,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-04 09:36:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467455666] [2023-08-04 09:36:38,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:38,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 09:36:38,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 09:36:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 09:36:38,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 230 [2023-08-04 09:36:38,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 96.5) internal successors, (772), 8 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 09:36:38,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:38,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 230 [2023-08-04 09:36:38,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:38,760 INFO L124 PetriNetUnfolderBase]: 5537/7411 cut-off events. [2023-08-04 09:36:38,760 INFO L125 PetriNetUnfolderBase]: For 7307/7722 co-relation queries the response was YES. [2023-08-04 09:36:38,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22602 conditions, 7411 events. 5537/7411 cut-off events. For 7307/7722 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 33160 event pairs, 491 based on Foata normal form. 753/6662 useless extension candidates. Maximal degree in co-relation 22380. Up to 3417 conditions per place. [2023-08-04 09:36:38,799 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 164 selfloop transitions, 13 changer transitions 0/183 dead transitions. [2023-08-04 09:36:38,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 183 transitions, 1240 flow [2023-08-04 09:36:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 09:36:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 09:36:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 892 transitions. [2023-08-04 09:36:38,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48478260869565215 [2023-08-04 09:36:38,802 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 892 transitions. [2023-08-04 09:36:38,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 892 transitions. [2023-08-04 09:36:38,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:38,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 892 transitions. [2023-08-04 09:36:38,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.5) internal successors, (892), 8 states have internal predecessors, (892), 0 states have call successors, (0), 0 states 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 09:36:38,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states 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 09:36:38,807 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states 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 09:36:38,807 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 239 flow. Second operand 8 states and 892 transitions. [2023-08-04 09:36:38,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 183 transitions, 1240 flow [2023-08-04 09:36:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 183 transitions, 1211 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:38,826 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 294 flow [2023-08-04 09:36:38,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-04 09:36:38,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2023-08-04 09:36:38,827 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 294 flow [2023-08-04 09:36:38,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.5) internal successors, (772), 8 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 09:36:38,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:38,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:38,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:39,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 09:36:39,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:39,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash -485004088, now seen corresponding path program 1 times [2023-08-04 09:36:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:39,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904804551] [2023-08-04 09:36:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904804551] [2023-08-04 09:36:39,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904804551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113431036] [2023-08-04 09:36:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:39,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:39,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:36:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:36:39,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:39,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:39,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113431036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:39,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:39,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-04 09:36:39,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450718000] [2023-08-04 09:36:39,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 09:36:39,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 09:36:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 09:36:39,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 230 [2023-08-04 09:36:39,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:39,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 230 [2023-08-04 09:36:39,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:40,013 INFO L124 PetriNetUnfolderBase]: 6600/8913 cut-off events. [2023-08-04 09:36:40,013 INFO L125 PetriNetUnfolderBase]: For 13509/15078 co-relation queries the response was YES. [2023-08-04 09:36:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28560 conditions, 8913 events. 6600/8913 cut-off events. For 13509/15078 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 41630 event pairs, 1398 based on Foata normal form. 577/7738 useless extension candidates. Maximal degree in co-relation 28307. Up to 7251 conditions per place. [2023-08-04 09:36:40,066 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 102 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2023-08-04 09:36:40,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 134 transitions, 941 flow [2023-08-04 09:36:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 09:36:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 09:36:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 675 transitions. [2023-08-04 09:36:40,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2023-08-04 09:36:40,068 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 675 transitions. [2023-08-04 09:36:40,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 675 transitions. [2023-08-04 09:36:40,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:40,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 675 transitions. [2023-08-04 09:36:40,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 09:36:40,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 09:36:40,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 09:36:40,072 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 294 flow. Second operand 6 states and 675 transitions. [2023-08-04 09:36:40,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 134 transitions, 941 flow [2023-08-04 09:36:40,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 134 transitions, 910 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:40,103 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 458 flow [2023-08-04 09:36:40,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2023-08-04 09:36:40,103 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2023-08-04 09:36:40,103 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 458 flow [2023-08-04 09:36:40,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:40,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:40,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 09:36:40,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:40,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:40,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -885741540, now seen corresponding path program 2 times [2023-08-04 09:36:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759044992] [2023-08-04 09:36:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:36:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759044992] [2023-08-04 09:36:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759044992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:40,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:40,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 09:36:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588263368] [2023-08-04 09:36:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:40,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:40,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-04 09:36:40,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 458 flow. Second operand has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 09:36:40,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:40,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-04 09:36:40,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:41,543 INFO L124 PetriNetUnfolderBase]: 11245/15495 cut-off events. [2023-08-04 09:36:41,543 INFO L125 PetriNetUnfolderBase]: For 33741/36055 co-relation queries the response was YES. [2023-08-04 09:36:41,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54513 conditions, 15495 events. 11245/15495 cut-off events. For 33741/36055 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 79201 event pairs, 3157 based on Foata normal form. 2503/16221 useless extension candidates. Maximal degree in co-relation 54005. Up to 8781 conditions per place. [2023-08-04 09:36:41,659 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 154 selfloop transitions, 3 changer transitions 32/198 dead transitions. [2023-08-04 09:36:41,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 198 transitions, 1683 flow [2023-08-04 09:36:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:36:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:36:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-04 09:36:41,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49826086956521737 [2023-08-04 09:36:41,664 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-04 09:36:41,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-04 09:36:41,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:41,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-04 09:36:41,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 09:36:41,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:36:41,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:36:41,667 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 458 flow. Second operand 5 states and 573 transitions. [2023-08-04 09:36:41,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 198 transitions, 1683 flow [2023-08-04 09:36:41,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 198 transitions, 1667 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:41,749 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 498 flow [2023-08-04 09:36:41,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-08-04 09:36:41,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2023-08-04 09:36:41,750 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 498 flow [2023-08-04 09:36:41,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 0 states have call successors, (0), 0 states 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 09:36:41,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:41,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:41,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:36:41,750 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:41,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:41,754 INFO L85 PathProgramCache]: Analyzing trace with hash -791163360, now seen corresponding path program 3 times [2023-08-04 09:36:41,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:41,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711918827] [2023-08-04 09:36:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:41,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:36:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711918827] [2023-08-04 09:36:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711918827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843551399] [2023-08-04 09:36:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 09:36:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:41,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:41,834 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:41,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:36:41,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 09:36:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:36:41,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 09:36:41,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:36:41,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:41,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843551399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:41,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:41,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-08-04 09:36:41,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502394848] [2023-08-04 09:36:41,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:41,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:36:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:36:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:36:41,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-04 09:36:41,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 09:36:41,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:41,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-04 09:36:41,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:43,081 INFO L124 PetriNetUnfolderBase]: 7667/10587 cut-off events. [2023-08-04 09:36:43,081 INFO L125 PetriNetUnfolderBase]: For 24937/27122 co-relation queries the response was YES. [2023-08-04 09:36:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39252 conditions, 10587 events. 7667/10587 cut-off events. For 24937/27122 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 50808 event pairs, 2782 based on Foata normal form. 1938/11445 useless extension candidates. Maximal degree in co-relation 38967. Up to 8214 conditions per place. [2023-08-04 09:36:43,201 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 104 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-04 09:36:43,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1038 flow [2023-08-04 09:36:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 447 transitions. [2023-08-04 09:36:43,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48586956521739133 [2023-08-04 09:36:43,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 447 transitions. [2023-08-04 09:36:43,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 447 transitions. [2023-08-04 09:36:43,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:43,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 447 transitions. [2023-08-04 09:36:43,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 09:36:43,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:43,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 09:36:43,206 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 498 flow. Second operand 4 states and 447 transitions. [2023-08-04 09:36:43,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1038 flow [2023-08-04 09:36:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 986 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:43,275 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 468 flow [2023-08-04 09:36:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=468, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-08-04 09:36:43,276 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-08-04 09:36:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 468 flow [2023-08-04 09:36:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 09:36:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:43,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 09:36:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:43,482 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:43,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -220258746, now seen corresponding path program 1 times [2023-08-04 09:36:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199826921] [2023-08-04 09:36:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:36:43,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199826921] [2023-08-04 09:36:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199826921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979292472] [2023-08-04 09:36:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:43,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:43,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:36:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:43,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-04 09:36:43,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:36:44,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:36:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979292472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:44,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2023-08-04 09:36:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131624494] [2023-08-04 09:36:44,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 09:36:44,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 09:36:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-08-04 09:36:44,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-04 09:36:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 468 flow. Second operand has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 09:36:44,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:44,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-04 09:36:44,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:55,206 INFO L124 PetriNetUnfolderBase]: 76253/103850 cut-off events. [2023-08-04 09:36:55,206 INFO L125 PetriNetUnfolderBase]: For 195229/206751 co-relation queries the response was YES. [2023-08-04 09:36:55,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365986 conditions, 103850 events. 76253/103850 cut-off events. For 195229/206751 co-relation queries the response was YES. Maximal size of possible extension queue 2567. Compared 663521 event pairs, 2941 based on Foata normal form. 11525/102605 useless extension candidates. Maximal degree in co-relation 364260. Up to 16900 conditions per place. [2023-08-04 09:36:56,107 INFO L140 encePairwiseOnDemand]: 219/230 looper letters, 698 selfloop transitions, 187 changer transitions 15/909 dead transitions. [2023-08-04 09:36:56,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 909 transitions, 6596 flow [2023-08-04 09:36:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-04 09:36:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-04 09:36:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3317 transitions. [2023-08-04 09:36:56,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150621118012423 [2023-08-04 09:36:56,115 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3317 transitions. [2023-08-04 09:36:56,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3317 transitions. [2023-08-04 09:36:56,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:56,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3317 transitions. [2023-08-04 09:36:56,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.46428571428571) internal successors, (3317), 28 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states 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 09:36:56,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 230.0) internal successors, (6670), 29 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states 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 09:36:56,130 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 230.0) internal successors, (6670), 29 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states 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 09:36:56,130 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 468 flow. Second operand 28 states and 3317 transitions. [2023-08-04 09:36:56,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 909 transitions, 6596 flow [2023-08-04 09:36:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 909 transitions, 6514 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:57,583 INFO L231 Difference]: Finished difference. Result has 130 places, 257 transitions, 2082 flow [2023-08-04 09:36:57,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2082, PETRI_PLACES=130, PETRI_TRANSITIONS=257} [2023-08-04 09:36:57,583 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-04 09:36:57,584 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 257 transitions, 2082 flow [2023-08-04 09:36:57,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 09:36:57,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:57,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:57,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 09:36:57,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 09:36:57,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:57,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 222773726, now seen corresponding path program 1 times [2023-08-04 09:36:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200890952] [2023-08-04 09:36:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:57,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:36:57,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:57,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200890952] [2023-08-04 09:36:57,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200890952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:57,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320912081] [2023-08-04 09:36:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:57,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:57,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:57,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:36:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:57,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 09:36:57,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:36:58,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 09:36:58,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320912081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:58,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:58,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:36:58,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438908685] [2023-08-04 09:36:58,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:58,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:58,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 230 [2023-08-04 09:36:58,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 257 transitions, 2082 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 09:36:58,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:58,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 230 [2023-08-04 09:36:58,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:37:13,666 INFO L124 PetriNetUnfolderBase]: 84615/118114 cut-off events. [2023-08-04 09:37:13,667 INFO L125 PetriNetUnfolderBase]: For 1574317/1587017 co-relation queries the response was YES. [2023-08-04 09:37:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667082 conditions, 118114 events. 84615/118114 cut-off events. For 1574317/1587017 co-relation queries the response was YES. Maximal size of possible extension queue 3010. Compared 799670 event pairs, 26450 based on Foata normal form. 14842/132883 useless extension candidates. Maximal degree in co-relation 665064. Up to 103694 conditions per place. [2023-08-04 09:37:15,034 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 319 selfloop transitions, 51 changer transitions 0/382 dead transitions. [2023-08-04 09:37:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 382 transitions, 3953 flow [2023-08-04 09:37:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:37:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:37:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-04 09:37:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852173913043478 [2023-08-04 09:37:15,036 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-04 09:37:15,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-04 09:37:15,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:37:15,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-04 09:37:15,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 09:37:15,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:37:15,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 09:37:15,046 INFO L175 Difference]: Start difference. First operand has 130 places, 257 transitions, 2082 flow. Second operand 5 states and 558 transitions. [2023-08-04 09:37:15,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 382 transitions, 3953 flow [2023-08-04 09:37:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 382 transitions, 3869 flow, removed 42 selfloop flow, removed 0 redundant places. [2023-08-04 09:37:30,993 INFO L231 Difference]: Finished difference. Result has 137 places, 288 transitions, 2534 flow [2023-08-04 09:37:30,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2534, PETRI_PLACES=137, PETRI_TRANSITIONS=288} [2023-08-04 09:37:30,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2023-08-04 09:37:30,994 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 288 transitions, 2534 flow [2023-08-04 09:37:30,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 09:37:30,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:30,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:31,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 09:37:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:31,195 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:31,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1073240560, now seen corresponding path program 2 times [2023-08-04 09:37:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036037377] [2023-08-04 09:37:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:37:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:31,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036037377] [2023-08-04 09:37:31,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036037377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:37:31,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671341597] [2023-08-04 09:37:31,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 09:37:31,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:37:31,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:37:31,358 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:37:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 09:37:31,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 09:37:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:37:31,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 09:37:31,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:37:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:37:31,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:37:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 09:37:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671341597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:37:31,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:37:31,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-04 09:37:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71439170] [2023-08-04 09:37:31,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:37:31,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 09:37:31,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 09:37:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-04 09:37:32,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 230 [2023-08-04 09:37:32,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 288 transitions, 2534 flow. Second operand has 18 states, 18 states have (on average 96.05555555555556) internal successors, (1729), 18 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states 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 09:37:32,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:32,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 230 [2023-08-04 09:37:32,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:38:20,193 INFO L124 PetriNetUnfolderBase]: 234145/329370 cut-off events. [2023-08-04 09:38:20,193 INFO L125 PetriNetUnfolderBase]: For 4375443/4389950 co-relation queries the response was YES. [2023-08-04 09:38:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817439 conditions, 329370 events. 234145/329370 cut-off events. For 4375443/4389950 co-relation queries the response was YES. Maximal size of possible extension queue 8380. Compared 2542532 event pairs, 28436 based on Foata normal form. 29077/358382 useless extension candidates. Maximal degree in co-relation 1815282. Up to 101763 conditions per place. [2023-08-04 09:38:24,461 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 989 selfloop transitions, 854 changer transitions 41/1893 dead transitions. [2023-08-04 09:38:24,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 1893 transitions, 19521 flow [2023-08-04 09:38:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-04 09:38:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-04 09:38:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3907 transitions. [2023-08-04 09:38:24,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853416149068323 [2023-08-04 09:38:24,466 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3907 transitions. [2023-08-04 09:38:24,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3907 transitions. [2023-08-04 09:38:24,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:38:24,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3907 transitions. [2023-08-04 09:38:24,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.62857142857143) internal successors, (3907), 35 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 09:38:24,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 230.0) internal successors, (8280), 36 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states 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 09:38:24,480 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 230.0) internal successors, (8280), 36 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states 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 09:38:24,480 INFO L175 Difference]: Start difference. First operand has 137 places, 288 transitions, 2534 flow. Second operand 35 states and 3907 transitions. [2023-08-04 09:38:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 1893 transitions, 19521 flow [2023-08-04 09:40:34,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1893 transitions, 18922 flow, removed 226 selfloop flow, removed 1 redundant places. [2023-08-04 09:40:34,486 INFO L231 Difference]: Finished difference. Result has 200 places, 1150 transitions, 12999 flow [2023-08-04 09:40:34,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12999, PETRI_PLACES=200, PETRI_TRANSITIONS=1150} [2023-08-04 09:40:34,487 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2023-08-04 09:40:34,487 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 1150 transitions, 12999 flow [2023-08-04 09:40:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 96.05555555555556) internal successors, (1729), 18 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states 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 09:40:34,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:34,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:34,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-04 09:40:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:34,694 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:34,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1311711342, now seen corresponding path program 3 times [2023-08-04 09:40:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536156001] [2023-08-04 09:40:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:40:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536156001] [2023-08-04 09:40:34,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536156001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680218080] [2023-08-04 09:40:34,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 09:40:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:34,853 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:40:34,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 09:40:34,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 09:40:34,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 09:40:34,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 09:40:34,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:40:35,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:40:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:40:35,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680218080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:40:35,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:40:35,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-04 09:40:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811727861] [2023-08-04 09:40:35,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:40:35,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 09:40:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 09:40:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-04 09:40:35,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 230 [2023-08-04 09:40:35,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 1150 transitions, 12999 flow. Second operand has 18 states, 18 states have (on average 95.38888888888889) internal successors, (1717), 18 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states 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 09:40:35,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:35,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 230 [2023-08-04 09:40:35,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand