/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_chl-nzb-file-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:26:58,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:26:58,237 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:26:58,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:26:58,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:26:58,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:26:58,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:26:58,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:26:58,276 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:26:58,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:26:58,280 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:26:58,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:26:58,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:26:58,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:26:58,282 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:26:58,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:26:58,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:26:58,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:26:58,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:26:58,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:26:58,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:26:58,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:26:58,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:26:58,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:26:58,285 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:26:58,286 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:26:58,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:26:58,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:26:58,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:26:58,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:26:58,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:26:58,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:26:58,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:26:58,289 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:26:58,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:26:58,289 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:26:58,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:26:58,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:26:58,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:26:58,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:26:58,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:26:58,540 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:26:58,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 08:26:59,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:26:59,906 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:26:59,906 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 08:26:59,922 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341ff65a6/13cd6c61d8374e71ac039ebb4bc6750b/FLAG52171e4a7 [2023-08-04 08:26:59,937 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341ff65a6/13cd6c61d8374e71ac039ebb4bc6750b [2023-08-04 08:26:59,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:26:59,941 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:26:59,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:26:59,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:26:59,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:26:59,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:59" (1/1) ... [2023-08-04 08:26:59,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bdaeec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:59, skipping insertion in model container [2023-08-04 08:26:59,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:59" (1/1) ... [2023-08-04 08:26:59,973 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:27:00,142 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_chl-nzb-file-subst.wvr_bound2.c[6744,6757] [2023-08-04 08:27:00,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:27:00,157 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:27:00,205 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_chl-nzb-file-subst.wvr_bound2.c[6744,6757] [2023-08-04 08:27:00,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:27:00,223 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:27:00,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00 WrapperNode [2023-08-04 08:27:00,223 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:27:00,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:27:00,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:27:00,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:27:00,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,281 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-04 08:27:00,282 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:27:00,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:27:00,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:27:00,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:27:00,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:27:00,353 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:27:00,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:27:00,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:27:00,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (1/1) ... [2023-08-04 08:27:00,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:27:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:00,409 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 08:27:00,436 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 08:27:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:27:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:27:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:27:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:27:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:27:00,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:27:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:27:00,456 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:27:00,456 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:27:00,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:27:00,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:27:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:27:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:27:00,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:27:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:27:00,461 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 08:27:00,603 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:27:00,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:27:01,377 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:27:01,393 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:27:01,393 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:27:01,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:27:01 BoogieIcfgContainer [2023-08-04 08:27:01,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:27:01,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:27:01,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:27:01,401 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:27:01,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:26:59" (1/3) ... [2023-08-04 08:27:01,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98ffebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:27:01, skipping insertion in model container [2023-08-04 08:27:01,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:27:00" (2/3) ... [2023-08-04 08:27:01,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98ffebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:27:01, skipping insertion in model container [2023-08-04 08:27:01,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:27:01" (3/3) ... [2023-08-04 08:27:01,405 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 08:27:01,413 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:27:01,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:27:01,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:27:01,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:27:01,588 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:27:01,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:02,337 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:27:02,337 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:27:02,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 08:27:02,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:02,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:02,487 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:02,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:02,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:02,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:27:03,034 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:27:03,035 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:27:03,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 08:27:03,213 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 08:27:24,574 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-04 08:27:24,575 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-04 08:27:24,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:27:24,592 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;@31c758d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:24,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:27:24,600 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:24,600 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2023-08-04 08:27:24,600 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:27:24,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:24,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:24,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:24,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -499537452, now seen corresponding path program 1 times [2023-08-04 08:27:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:24,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52751417] [2023-08-04 08:27:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:25,051 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 08:27:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:25,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52751417] [2023-08-04 08:27:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52751417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:25,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:27:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925691437] [2023-08-04 08:27:25,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:25,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:25,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:25,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-04 08:27:25,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 700.3333333333334) internal successors, (2101), 3 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:25,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-04 08:27:25,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:35,663 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-04 08:27:35,663 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-04 08:27:35,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283542 conditions, 141285 events. 110493/141285 cut-off events. For 5106/5106 co-relation queries the response was YES. Maximal size of possible extension queue 2629. Compared 733792 event pairs, 71640 based on Foata normal form. 0/92781 useless extension candidates. Maximal degree in co-relation 263068. Up to 139997 conditions per place. [2023-08-04 08:27:36,384 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 88 selfloop transitions, 6 changer transitions 3/100 dead transitions. [2023-08-04 08:27:36,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-04 08:27:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-04 08:27:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-04 08:27:36,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-04 08:27:36,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-04 08:27:36,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:36,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-04 08:27:36,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 729.6666666666666) internal successors, (2189), 3 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,450 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-04 08:27:36,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-04 08:27:36,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:27:36,463 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 256 flow [2023-08-04 08:27:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-08-04 08:27:36,468 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 08:27:36,469 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 256 flow [2023-08-04 08:27:36,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 700.3333333333334) internal successors, (2101), 3 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:36,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:27:36,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:36,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1608196217, now seen corresponding path program 1 times [2023-08-04 08:27:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952859300] [2023-08-04 08:27:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:36,582 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 08:27:36,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952859300] [2023-08-04 08:27:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952859300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:36,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:36,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:36,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674585361] [2023-08-04 08:27:36,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:36,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:36,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:36,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:27:36,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 709.3333333333334) internal successors, (2128), 3 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:36,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:27:36,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:45,642 INFO L124 PetriNetUnfolderBase]: 108929/138796 cut-off events. [2023-08-04 08:27:45,643 INFO L125 PetriNetUnfolderBase]: For 4606/4606 co-relation queries the response was YES. [2023-08-04 08:27:45,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278792 conditions, 138796 events. 108929/138796 cut-off events. For 4606/4606 co-relation queries the response was YES. Maximal size of possible extension queue 2725. Compared 718422 event pairs, 45948 based on Foata normal form. 0/91181 useless extension candidates. Maximal degree in co-relation 278758. Up to 137800 conditions per place. [2023-08-04 08:27:46,286 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 110 selfloop transitions, 2 changer transitions 1/116 dead transitions. [2023-08-04 08:27:46,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 520 flow [2023-08-04 08:27:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2226 transitions. [2023-08-04 08:27:46,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44087938205585264 [2023-08-04 08:27:46,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2226 transitions. [2023-08-04 08:27:46,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2226 transitions. [2023-08-04 08:27:46,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:46,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2226 transitions. [2023-08-04 08:27:46,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 742.0) internal successors, (2226), 3 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:46,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:46,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:46,313 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 256 flow. Second operand 3 states and 2226 transitions. [2023-08-04 08:27:46,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 520 flow [2023-08-04 08:27:46,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 502 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:27:46,355 INFO L231 Difference]: Finished difference. Result has 73 places, 97 transitions, 246 flow [2023-08-04 08:27:46,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=97} [2023-08-04 08:27:46,356 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2023-08-04 08:27:46,356 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 97 transitions, 246 flow [2023-08-04 08:27:46,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 709.3333333333334) internal successors, (2128), 3 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:46,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:46,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:27:46,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:46,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1146420261, now seen corresponding path program 1 times [2023-08-04 08:27:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620017803] [2023-08-04 08:27:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:46,424 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 08:27:46,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620017803] [2023-08-04 08:27:46,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620017803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103789905] [2023-08-04 08:27:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:46,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:46,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:46,433 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 08:27:46,477 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 08:27:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:46,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:46,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:27:46,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103789905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228924493] [2023-08-04 08:27:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:46,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:46,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:27:46,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 97 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:27:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:55,607 INFO L124 PetriNetUnfolderBase]: 107463/136760 cut-off events. [2023-08-04 08:27:55,607 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2023-08-04 08:27:55,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274586 conditions, 136760 events. 107463/136760 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 2788. Compared 718727 event pairs, 45674 based on Foata normal form. 0/89766 useless extension candidates. Maximal degree in co-relation 274547. Up to 135279 conditions per place. [2023-08-04 08:27:56,180 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 128 selfloop transitions, 2 changer transitions 1/134 dead transitions. [2023-08-04 08:27:56,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 134 transitions, 582 flow [2023-08-04 08:27:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2244 transitions. [2023-08-04 08:27:56,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 08:27:56,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2244 transitions. [2023-08-04 08:27:56,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2244 transitions. [2023-08-04 08:27:56,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:56,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2244 transitions. [2023-08-04 08:27:56,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.0) internal successors, (2244), 3 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:56,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:56,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:56,205 INFO L175 Difference]: Start difference. First operand has 73 places, 97 transitions, 246 flow. Second operand 3 states and 2244 transitions. [2023-08-04 08:27:56,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 134 transitions, 582 flow [2023-08-04 08:27:56,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 134 transitions, 578 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:56,210 INFO L231 Difference]: Finished difference. Result has 74 places, 97 transitions, 250 flow [2023-08-04 08:27:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=74, PETRI_TRANSITIONS=97} [2023-08-04 08:27:56,212 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -1 predicate places. [2023-08-04 08:27:56,212 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 97 transitions, 250 flow [2023-08-04 08:27:56,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 710.3333333333334) internal successors, (2131), 3 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:56,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:56,214 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 08:27:56,225 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 08:27:56,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:56,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:56,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1786772920, now seen corresponding path program 1 times [2023-08-04 08:27:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:56,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115422372] [2023-08-04 08:27:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:27:56,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:56,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115422372] [2023-08-04 08:27:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115422372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:56,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193428767] [2023-08-04 08:27:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:56,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:56,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:56,500 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 08:27:56,503 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 08:27:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:56,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:56,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:27:56,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:56,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193428767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:56,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:56,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174386312] [2023-08-04 08:27:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:56,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:27:56,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:56,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:56,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:27:56,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:05,212 INFO L124 PetriNetUnfolderBase]: 107294/137293 cut-off events. [2023-08-04 08:28:05,212 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-08-04 08:28:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275457 conditions, 137293 events. 107294/137293 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 2939. Compared 748180 event pairs, 43853 based on Foata normal form. 0/90772 useless extension candidates. Maximal degree in co-relation 275418. Up to 125084 conditions per place. [2023-08-04 08:28:05,900 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 146 selfloop transitions, 2 changer transitions 1/152 dead transitions. [2023-08-04 08:28:05,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 152 transitions, 658 flow [2023-08-04 08:28:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2262 transitions. [2023-08-04 08:28:05,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44800950683303625 [2023-08-04 08:28:05,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2262 transitions. [2023-08-04 08:28:05,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2262 transitions. [2023-08-04 08:28:05,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:05,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2262 transitions. [2023-08-04 08:28:05,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 754.0) internal successors, (2262), 3 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:05,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:05,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:05,920 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 250 flow. Second operand 3 states and 2262 transitions. [2023-08-04 08:28:05,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 152 transitions, 658 flow [2023-08-04 08:28:05,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 152 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:05,923 INFO L231 Difference]: Finished difference. Result has 75 places, 97 transitions, 254 flow [2023-08-04 08:28:05,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=75, PETRI_TRANSITIONS=97} [2023-08-04 08:28:05,924 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2023-08-04 08:28:05,924 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 97 transitions, 254 flow [2023-08-04 08:28:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 711.3333333333334) internal successors, (2134), 3 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:05,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:05,925 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] [2023-08-04 08:28:05,932 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 08:28:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:28:06,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:06,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1401232047, now seen corresponding path program 1 times [2023-08-04 08:28:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374438660] [2023-08-04 08:28:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:28:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374438660] [2023-08-04 08:28:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374438660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594836014] [2023-08-04 08:28:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:06,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:06,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:06,213 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 08:28:06,218 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 08:28:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:06,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:06,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:28:06,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594836014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:06,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:06,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690088183] [2023-08-04 08:28:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:06,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:28:06,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 97 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 712.3333333333334) internal successors, (2137), 3 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:06,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:06,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:28:06,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:11,082 INFO L124 PetriNetUnfolderBase]: 57842/74828 cut-off events. [2023-08-04 08:28:11,082 INFO L125 PetriNetUnfolderBase]: For 5122/5122 co-relation queries the response was YES. [2023-08-04 08:28:11,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157106 conditions, 74828 events. 57842/74828 cut-off events. For 5122/5122 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 384099 event pairs, 24589 based on Foata normal form. 0/53241 useless extension candidates. Maximal degree in co-relation 157066. Up to 49645 conditions per place. [2023-08-04 08:28:11,368 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 151 selfloop transitions, 2 changer transitions 0/156 dead transitions. [2023-08-04 08:28:11,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 684 flow [2023-08-04 08:28:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2266 transitions. [2023-08-04 08:28:11,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44880174291938996 [2023-08-04 08:28:11,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2266 transitions. [2023-08-04 08:28:11,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2266 transitions. [2023-08-04 08:28:11,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:11,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2266 transitions. [2023-08-04 08:28:11,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 755.3333333333334) internal successors, (2266), 3 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:11,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:11,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:11,387 INFO L175 Difference]: Start difference. First operand has 75 places, 97 transitions, 254 flow. Second operand 3 states and 2266 transitions. [2023-08-04 08:28:11,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 684 flow [2023-08-04 08:28:11,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 156 transitions, 680 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:11,396 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 262 flow [2023-08-04 08:28:11,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2023-08-04 08:28:11,397 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2023-08-04 08:28:11,397 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 262 flow [2023-08-04 08:28:11,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.3333333333334) internal successors, (2137), 3 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:11,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:11,398 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, 1, 1] [2023-08-04 08:28:11,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 08:28:11,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:11,604 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:11,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1369013047, now seen corresponding path program 1 times [2023-08-04 08:28:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:11,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213499549] [2023-08-04 08:28:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:28:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213499549] [2023-08-04 08:28:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213499549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347827549] [2023-08-04 08:28:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:11,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:11,696 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 08:28:11,698 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 08:28:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:11,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:11,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:28:11,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:11,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347827549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:11,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:11,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:11,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248378283] [2023-08-04 08:28:11,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:11,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:11,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:11,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:11,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:28:11,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 713.6666666666666) internal successors, (2141), 3 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:11,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:11,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:28:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:16,401 INFO L124 PetriNetUnfolderBase]: 53569/68903 cut-off events. [2023-08-04 08:28:16,402 INFO L125 PetriNetUnfolderBase]: For 13165/13165 co-relation queries the response was YES. [2023-08-04 08:28:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146787 conditions, 68903 events. 53569/68903 cut-off events. For 13165/13165 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 339498 event pairs, 32981 based on Foata normal form. 0/50209 useless extension candidates. Maximal degree in co-relation 146746. Up to 64305 conditions per place. [2023-08-04 08:28:16,677 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 152 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2023-08-04 08:28:16,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 157 transitions, 694 flow [2023-08-04 08:28:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2266 transitions. [2023-08-04 08:28:16,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44880174291938996 [2023-08-04 08:28:16,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2266 transitions. [2023-08-04 08:28:16,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2266 transitions. [2023-08-04 08:28:16,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:16,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2266 transitions. [2023-08-04 08:28:16,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 755.3333333333334) internal successors, (2266), 3 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:16,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:16,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:16,694 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 262 flow. Second operand 3 states and 2266 transitions. [2023-08-04 08:28:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 157 transitions, 694 flow [2023-08-04 08:28:16,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 157 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:16,953 INFO L231 Difference]: Finished difference. Result has 78 places, 99 transitions, 272 flow [2023-08-04 08:28:16,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=78, PETRI_TRANSITIONS=99} [2023-08-04 08:28:16,956 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2023-08-04 08:28:16,956 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 99 transitions, 272 flow [2023-08-04 08:28:16,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 713.6666666666666) internal successors, (2141), 3 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:16,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:16,957 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:16,963 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 08:28:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:17,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:17,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1693345509, now seen corresponding path program 1 times [2023-08-04 08:28:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:17,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111043752] [2023-08-04 08:28:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:28:17,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111043752] [2023-08-04 08:28:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111043752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747432290] [2023-08-04 08:28:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:17,245 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 08:28:17,248 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 08:28:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:17,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:17,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:28:17,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747432290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:17,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:28:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957772973] [2023-08-04 08:28:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:17,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:17,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:17,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 705 out of 1683 [2023-08-04 08:28:17,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 99 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 715.0) internal successors, (2145), 3 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:17,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:17,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 705 of 1683 [2023-08-04 08:28:17,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:21,911 INFO L124 PetriNetUnfolderBase]: 53514/68811 cut-off events. [2023-08-04 08:28:21,911 INFO L125 PetriNetUnfolderBase]: For 8326/8326 co-relation queries the response was YES. [2023-08-04 08:28:22,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146765 conditions, 68811 events. 53514/68811 cut-off events. For 8326/8326 co-relation queries the response was YES. Maximal size of possible extension queue 1491. Compared 338718 event pairs, 34854 based on Foata normal form. 0/50214 useless extension candidates. Maximal degree in co-relation 146723. Up to 68167 conditions per place. [2023-08-04 08:28:22,184 INFO L140 encePairwiseOnDemand]: 1680/1683 looper letters, 146 selfloop transitions, 2 changer transitions 3/154 dead transitions. [2023-08-04 08:28:22,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 154 transitions, 684 flow [2023-08-04 08:28:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2262 transitions. [2023-08-04 08:28:22,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44800950683303625 [2023-08-04 08:28:22,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2262 transitions. [2023-08-04 08:28:22,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2262 transitions. [2023-08-04 08:28:22,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:22,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2262 transitions. [2023-08-04 08:28:22,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 754.0) internal successors, (2262), 3 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:22,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:22,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:22,196 INFO L175 Difference]: Start difference. First operand has 78 places, 99 transitions, 272 flow. Second operand 3 states and 2262 transitions. [2023-08-04 08:28:22,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 154 transitions, 684 flow [2023-08-04 08:28:22,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 154 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:22,491 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 270 flow [2023-08-04 08:28:22,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2023-08-04 08:28:22,492 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2023-08-04 08:28:22,492 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 270 flow [2023-08-04 08:28:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 715.0) internal successors, (2145), 3 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:22,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:22,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:28:22,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:22,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:22,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 680875924, now seen corresponding path program 1 times [2023-08-04 08:28:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:22,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722367912] [2023-08-04 08:28:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:22,804 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 08:28:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:22,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722367912] [2023-08-04 08:28:22,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722367912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:22,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957468040] [2023-08-04 08:28:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:22,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:22,806 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 08:28:22,809 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 08:28:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:22,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:28:22,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:23,016 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 08:28:23,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:23,231 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 08:28:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957468040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:23,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:28:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786716184] [2023-08-04 08:28:23,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:23,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:28:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:28:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:28:23,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 686 out of 1683 [2023-08-04 08:28:23,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 692.125) internal successors, (5537), 8 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:23,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 686 of 1683 [2023-08-04 08:28:23,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:23,499 INFO L124 PetriNetUnfolderBase]: 45/101 cut-off events. [2023-08-04 08:28:23,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:23,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 101 events. 45/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 201 event pairs, 0 based on Foata normal form. 16/97 useless extension candidates. Maximal degree in co-relation 235. Up to 62 conditions per place. [2023-08-04 08:28:23,500 INFO L140 encePairwiseOnDemand]: 1674/1683 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2023-08-04 08:28:23,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 278 flow [2023-08-04 08:28:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:28:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:28:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5557 transitions. [2023-08-04 08:28:23,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127302436125966 [2023-08-04 08:28:23,508 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5557 transitions. [2023-08-04 08:28:23,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5557 transitions. [2023-08-04 08:28:23,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:23,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5557 transitions. [2023-08-04 08:28:23,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 694.625) internal successors, (5557), 8 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 1683.0) internal successors, (15147), 9 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,533 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 1683.0) internal successors, (15147), 9 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,533 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 270 flow. Second operand 8 states and 5557 transitions. [2023-08-04 08:28:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 278 flow [2023-08-04 08:28:23,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:23,534 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-04 08:28:23,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-04 08:28:23,535 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -37 predicate places. [2023-08-04 08:28:23,535 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-04 08:28:23,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 692.125) internal successors, (5537), 8 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,539 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:28:23,551 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 08:28:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:23,746 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:23,747 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:28:23,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,126 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:28:24,126 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:28:24,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 08:28:24,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:28:24,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 08:28:24,529 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 08:28:24,530 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 08:28:24,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-04 08:28:24,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 08:28:45,213 INFO L134 LiptonReduction]: Checked pairs total: 263464 [2023-08-04 08:28:45,213 INFO L136 LiptonReduction]: Total number of compositions: 917 [2023-08-04 08:28:45,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:28:45,215 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;@31c758d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:45,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:28:45,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:45,219 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 08:28:45,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:28:45,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:45,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:45,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:45,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash -204437456, now seen corresponding path program 1 times [2023-08-04 08:28:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812191184] [2023-08-04 08:28:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:45,273 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 08:28:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812191184] [2023-08-04 08:28:45,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812191184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:45,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:45,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:28:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814820338] [2023-08-04 08:28:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:45,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:45,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1682 [2023-08-04 08:28:45,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:45,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:45,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1682 [2023-08-04 08:28:45,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:54,460 INFO L124 PetriNetUnfolderBase]: 117570/150466 cut-off events. [2023-08-04 08:28:54,460 INFO L125 PetriNetUnfolderBase]: For 5231/5231 co-relation queries the response was YES. [2023-08-04 08:28:54,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301950 conditions, 150466 events. 117570/150466 cut-off events. For 5231/5231 co-relation queries the response was YES. Maximal size of possible extension queue 2755. Compared 787635 event pairs, 76917 based on Foata normal form. 0/99494 useless extension candidates. Maximal degree in co-relation 280173. Up to 149115 conditions per place. [2023-08-04 08:28:55,802 INFO L140 encePairwiseOnDemand]: 1674/1682 looper letters, 70 selfloop transitions, 6 changer transitions 22/101 dead transitions. [2023-08-04 08:28:55,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 434 flow [2023-08-04 08:28:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2190 transitions. [2023-08-04 08:28:55,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340071343638526 [2023-08-04 08:28:55,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2190 transitions. [2023-08-04 08:28:55,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2190 transitions. [2023-08-04 08:28:55,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:55,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2190 transitions. [2023-08-04 08:28:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 730.0) internal successors, (2190), 3 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:55,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1682.0) internal successors, (6728), 4 states have internal predecessors, (6728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:55,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1682.0) internal successors, (6728), 4 states have internal predecessors, (6728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:55,823 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 240 flow. Second operand 3 states and 2190 transitions. [2023-08-04 08:28:55,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 434 flow [2023-08-04 08:28:55,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 434 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:28:55,832 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 199 flow [2023-08-04 08:28:55,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2023-08-04 08:28:55,833 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-08-04 08:28:55,833 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 199 flow [2023-08-04 08:28:55,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:55,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:55,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:55,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:28:55,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:55,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1062535603, now seen corresponding path program 1 times [2023-08-04 08:28:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:55,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966711290] [2023-08-04 08:28:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:55,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966711290] [2023-08-04 08:28:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966711290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24389438] [2023-08-04 08:28:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:55,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:55,931 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 08:28:55,934 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 08:28:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:56,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:28:56,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:56,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:28:56,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24389438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:56,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:28:56,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796554781] [2023-08-04 08:28:56,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:56,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:28:56,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:28:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:28:56,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1682 [2023-08-04 08:28:56,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 199 flow. Second operand has 8 states, 8 states have (on average 693.5) internal successors, (5548), 8 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:56,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:56,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1682 [2023-08-04 08:28:56,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:58,981 INFO L124 PetriNetUnfolderBase]: 32171/41517 cut-off events. [2023-08-04 08:28:58,981 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-08-04 08:28:59,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83485 conditions, 41517 events. 32171/41517 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 188862 event pairs, 20732 based on Foata normal form. 6/29876 useless extension candidates. Maximal degree in co-relation 83433. Up to 41414 conditions per place. [2023-08-04 08:28:59,176 INFO L140 encePairwiseOnDemand]: 1675/1682 looper letters, 70 selfloop transitions, 15 changer transitions 0/88 dead transitions. [2023-08-04 08:28:59,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 405 flow [2023-08-04 08:28:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:28:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:28:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4240 transitions. [2023-08-04 08:28:59,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42013476020610385 [2023-08-04 08:28:59,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4240 transitions. [2023-08-04 08:28:59,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4240 transitions. [2023-08-04 08:28:59,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:59,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4240 transitions. [2023-08-04 08:28:59,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 706.6666666666666) internal successors, (4240), 6 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:59,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1682.0) internal successors, (11774), 7 states have internal predecessors, (11774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:59,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1682.0) internal successors, (11774), 7 states have internal predecessors, (11774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:59,199 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 199 flow. Second operand 6 states and 4240 transitions. [2023-08-04 08:28:59,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 405 flow [2023-08-04 08:28:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:59,201 INFO L231 Difference]: Finished difference. Result has 72 places, 88 transitions, 289 flow [2023-08-04 08:28:59,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=72, PETRI_TRANSITIONS=88} [2023-08-04 08:28:59,202 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-08-04 08:28:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 88 transitions, 289 flow [2023-08-04 08:28:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 693.5) internal successors, (5548), 8 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:59,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:59,202 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:59,207 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 08:28:59,403 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 08:28:59,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:59,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2117841904, now seen corresponding path program 2 times [2023-08-04 08:28:59,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:59,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369546826] [2023-08-04 08:28:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:28:59,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369546826] [2023-08-04 08:28:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369546826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213564750] [2023-08-04 08:28:59,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:28:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:59,538 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 08:28:59,540 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 08:28:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:28:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:28:59,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:28:59,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:28:59,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:28:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:28:59,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213564750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:28:59,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:28:59,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 08:28:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467183314] [2023-08-04 08:28:59,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:28:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:28:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:28:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:29:00,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1682 [2023-08-04 08:29:00,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 88 transitions, 289 flow. Second operand has 17 states, 17 states have (on average 692.7058823529412) internal successors, (11776), 17 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:00,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:00,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1682 [2023-08-04 08:29:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:03,148 INFO L124 PetriNetUnfolderBase]: 32171/41520 cut-off events. [2023-08-04 08:29:03,148 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2023-08-04 08:29:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83527 conditions, 41520 events. 32171/41520 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 188848 event pairs, 20732 based on Foata normal form. 1/29873 useless extension candidates. Maximal degree in co-relation 83424. Up to 41414 conditions per place. [2023-08-04 08:29:03,389 INFO L140 encePairwiseOnDemand]: 1675/1682 looper letters, 70 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2023-08-04 08:29:03,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 483 flow [2023-08-04 08:29:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:29:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:29:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4928 transitions. [2023-08-04 08:29:03,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41854934601664684 [2023-08-04 08:29:03,397 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4928 transitions. [2023-08-04 08:29:03,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4928 transitions. [2023-08-04 08:29:03,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:03,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4928 transitions. [2023-08-04 08:29:03,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 704.0) internal successors, (4928), 7 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:03,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1682.0) internal successors, (13456), 8 states have internal predecessors, (13456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:03,418 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1682.0) internal successors, (13456), 8 states have internal predecessors, (13456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:03,419 INFO L175 Difference]: Start difference. First operand has 72 places, 88 transitions, 289 flow. Second operand 7 states and 4928 transitions. [2023-08-04 08:29:03,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 483 flow [2023-08-04 08:29:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 91 transitions, 459 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 08:29:03,422 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 333 flow [2023-08-04 08:29:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1682, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2023-08-04 08:29:03,423 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-08-04 08:29:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 333 flow [2023-08-04 08:29:03,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 692.7058823529412) internal successors, (11776), 17 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:03,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:03,426 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:29:03,434 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 08:29:03,631 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 08:29:03,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:29:03,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -174361613, now seen corresponding path program 3 times [2023-08-04 08:29:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568288792] [2023-08-04 08:29:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:29:03,712 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:29:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:29:03,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:29:03,770 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:29:03,770 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:29:03,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:29:03,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:29:03,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 08:29:03,770 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:29:03,771 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:29:03,771 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:29:03,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:29:03,875 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:29:03,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:07,252 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 08:29:07,252 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:29:07,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81774 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-04 08:29:07,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:07,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:07,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:29:07,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:07,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:07,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 08:29:11,324 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 08:29:11,324 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:29:11,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81774 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-04 08:29:12,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880