/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-node-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:26:48,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:26:48,481 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:26:48,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:26:48,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:26:48,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:26:48,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:26:48,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:26:48,524 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:26:48,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:26:48,527 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:26:48,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:26:48,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:26:48,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:26:48,530 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:26:48,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:26:48,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:26:48,531 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:26:48,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:26:48,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:26:48,532 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:26:48,532 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:26:48,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:26:48,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:26:48,533 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:26:48,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:26:48,534 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:26:48,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:26:48,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:26:48,535 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:26:48,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:26:48,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:26:48,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:26:48,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:26:48,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:26:48,538 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:26:48,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:26:48,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:26:48,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:26:48,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:26:48,809 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:26:48,810 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:26:48,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-trans.wvr_bound2.c [2023-08-04 08:26:50,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:26:50,215 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:26:50,216 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-trans.wvr_bound2.c [2023-08-04 08:26:50,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3731b6335/3b58608a3483450b8ecf8627d828dd58/FLAG0a94b99e5 [2023-08-04 08:26:50,238 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3731b6335/3b58608a3483450b8ecf8627d828dd58 [2023-08-04 08:26:50,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:26:50,245 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:26:50,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:26:50,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:26:50,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:26:50,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639f2057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50, skipping insertion in model container [2023-08-04 08:26:50,252 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,281 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:26:50,447 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-node-trans.wvr_bound2.c[4188,4201] [2023-08-04 08:26:50,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:26:50,464 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:26:50,489 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-node-trans.wvr_bound2.c[4188,4201] [2023-08-04 08:26:50,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:26:50,507 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:26:50,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50 WrapperNode [2023-08-04 08:26:50,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:26:50,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:26:50,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:26:50,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:26:50,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,562 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 479 [2023-08-04 08:26:50,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:26:50,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:26:50,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:26:50,564 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:26:50,574 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,580 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,599 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,608 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:26:50,609 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:26:50,609 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:26:50,609 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:26:50,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (1/1) ... [2023-08-04 08:26:50,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:26:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:50,642 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 08:26:50,651 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 08:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:26:50,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:26:50,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:26:50,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:26:50,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:26:50,686 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 08:26:50,799 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:26:50,800 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:26:51,371 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:26:51,389 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:26:51,389 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:26:51,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:26:51 BoogieIcfgContainer [2023-08-04 08:26:51,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:26:51,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:26:51,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:26:51,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:26:51,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:26:50" (1/3) ... [2023-08-04 08:26:51,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:26:51, skipping insertion in model container [2023-08-04 08:26:51,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:50" (2/3) ... [2023-08-04 08:26:51,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:26:51, skipping insertion in model container [2023-08-04 08:26:51,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:26:51" (3/3) ... [2023-08-04 08:26:51,406 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-node-trans.wvr_bound2.c [2023-08-04 08:26:51,415 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:26:51,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:26:51,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:26:51,424 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:26:51,570 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:26:51,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,017 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:26:52,018 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:26:52,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:26:52,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,065 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:52,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:26:52,329 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:26:52,330 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:26:52,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:26:52,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 36000 [2023-08-04 08:27:08,772 INFO L134 LiptonReduction]: Checked pairs total: 57272 [2023-08-04 08:27:08,773 INFO L136 LiptonReduction]: Total number of compositions: 594 [2023-08-04 08:27:08,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:27:08,789 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;@2de2246e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:08,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:27:08,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:08,797 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2023-08-04 08:27:08,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:27:08,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:08,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:08,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:08,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -603425281, now seen corresponding path program 1 times [2023-08-04 08:27:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217689457] [2023-08-04 08:27:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:09,207 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 08:27:09,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:09,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217689457] [2023-08-04 08:27:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217689457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:09,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:09,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527804380] [2023-08-04 08:27:09,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:09,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:09,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:09,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:11,942 INFO L124 PetriNetUnfolderBase]: 23172/31744 cut-off events. [2023-08-04 08:27:11,943 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2023-08-04 08:27:12,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63742 conditions, 31744 events. 23172/31744 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 169003 event pairs, 11228 based on Foata normal form. 0/23684 useless extension candidates. Maximal degree in co-relation 57866. Up to 31027 conditions per place. [2023-08-04 08:27:12,142 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 77 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-04 08:27:12,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 374 flow [2023-08-04 08:27:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1573 transitions. [2023-08-04 08:27:12,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45873432487605714 [2023-08-04 08:27:12,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1573 transitions. [2023-08-04 08:27:12,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1573 transitions. [2023-08-04 08:27:12,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:12,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1573 transitions. [2023-08-04 08:27:12,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 524.3333333333334) internal successors, (1573), 3 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:12,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:12,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:12,195 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 196 flow. Second operand 3 states and 1573 transitions. [2023-08-04 08:27:12,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 374 flow [2023-08-04 08:27:12,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:27:12,211 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 190 flow [2023-08-04 08:27:12,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 08:27:12,216 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:27:12,217 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 190 flow [2023-08-04 08:27:12,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.3333333333333) internal successors, (1504), 3 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:12,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:12,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:12,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:27:12,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:12,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 704342914, now seen corresponding path program 1 times [2023-08-04 08:27:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:12,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476650282] [2023-08-04 08:27:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:27:12,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:12,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476650282] [2023-08-04 08:27:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476650282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859939845] [2023-08-04 08:27:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:12,417 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 08:27:12,428 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 08:27:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:12,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:12,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:27:12,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859939845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580644236] [2023-08-04 08:27:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:12,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:12,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:12,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:12,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:14,740 INFO L124 PetriNetUnfolderBase]: 22706/30998 cut-off events. [2023-08-04 08:27:14,740 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2023-08-04 08:27:14,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62269 conditions, 30998 events. 22706/30998 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 164703 event pairs, 11139 based on Foata normal form. 0/23119 useless extension candidates. Maximal degree in co-relation 62179. Up to 30179 conditions per place. [2023-08-04 08:27:14,910 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 86 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 08:27:14,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 406 flow [2023-08-04 08:27:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1581 transitions. [2023-08-04 08:27:14,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46106736657917763 [2023-08-04 08:27:14,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1581 transitions. [2023-08-04 08:27:14,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1581 transitions. [2023-08-04 08:27:14,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:14,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1581 transitions. [2023-08-04 08:27:14,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,927 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 190 flow. Second operand 3 states and 1581 transitions. [2023-08-04 08:27:14,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 406 flow [2023-08-04 08:27:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 92 transitions, 390 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:27:14,938 INFO L231 Difference]: Finished difference. Result has 60 places, 73 transitions, 182 flow [2023-08-04 08:27:14,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=73} [2023-08-04 08:27:14,939 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-04 08:27:14,939 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 73 transitions, 182 flow [2023-08-04 08:27:14,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 502.3333333333333) internal successors, (1507), 3 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:14,941 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 08:27:14,953 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 08:27:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:15,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:15,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1396575272, now seen corresponding path program 1 times [2023-08-04 08:27:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:15,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835619250] [2023-08-04 08:27:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:27:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835619250] [2023-08-04 08:27:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835619250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302969117] [2023-08-04 08:27:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:15,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:15,243 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 08:27:15,263 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 08:27:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:15,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:15,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:15,372 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 08:27:15,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:15,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302969117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:15,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:15,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:15,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349553947] [2023-08-04 08:27:15,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:15,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:15,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:15,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:15,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 73 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:15,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:17,370 INFO L124 PetriNetUnfolderBase]: 22642/30951 cut-off events. [2023-08-04 08:27:17,370 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-08-04 08:27:17,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62277 conditions, 30951 events. 22642/30951 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 165452 event pairs, 10778 based on Foata normal form. 0/23217 useless extension candidates. Maximal degree in co-relation 55290. Up to 28093 conditions per place. [2023-08-04 08:27:17,515 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 95 selfloop transitions, 2 changer transitions 1/101 dead transitions. [2023-08-04 08:27:17,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 434 flow [2023-08-04 08:27:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:27:17,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:27:17,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:27:17,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:27:17,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:17,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:27:17,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:17,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:17,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:17,532 INFO L175 Difference]: Start difference. First operand has 60 places, 73 transitions, 182 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:27:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 434 flow [2023-08-04 08:27:17,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:17,537 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 186 flow [2023-08-04 08:27:17,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 08:27:17,540 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-04 08:27:17,540 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 186 flow [2023-08-04 08:27:17,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.3333333333333) internal successors, (1510), 3 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:17,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:17,541 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 08:27:17,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:27:17,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:27:17,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:17,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash 237583025, now seen corresponding path program 1 times [2023-08-04 08:27:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792829022] [2023-08-04 08:27:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:27:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792829022] [2023-08-04 08:27:17,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792829022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:17,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137967070] [2023-08-04 08:27:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:17,852 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 08:27:17,855 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 08:27:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:17,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:17,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:17,997 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 08:27:17,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137967070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:17,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:17,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:17,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679593705] [2023-08-04 08:27:17,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:17,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:17,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:18,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:18,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:18,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:18,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:19,234 INFO L124 PetriNetUnfolderBase]: 12754/17735 cut-off events. [2023-08-04 08:27:19,234 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2023-08-04 08:27:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37374 conditions, 17735 events. 12754/17735 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 87410 event pairs, 6679 based on Foata normal form. 0/14161 useless extension candidates. Maximal degree in co-relation 33250. Up to 12365 conditions per place. [2023-08-04 08:27:19,290 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 100 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 08:27:19,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 105 transitions, 460 flow [2023-08-04 08:27:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:27:19,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:27:19,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:27:19,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:27:19,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:19,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:27:19,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:19,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:19,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:19,306 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 186 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:27:19,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 105 transitions, 460 flow [2023-08-04 08:27:19,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:19,309 INFO L231 Difference]: Finished difference. Result has 62 places, 74 transitions, 194 flow [2023-08-04 08:27:19,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=62, PETRI_TRANSITIONS=74} [2023-08-04 08:27:19,310 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-04 08:27:19,310 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 74 transitions, 194 flow [2023-08-04 08:27:19,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:19,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:19,312 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] [2023-08-04 08:27:19,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:19,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:19,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:19,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:19,518 INFO L85 PathProgramCache]: Analyzing trace with hash 873971047, now seen corresponding path program 1 times [2023-08-04 08:27:19,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:19,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999796981] [2023-08-04 08:27:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:19,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:19,606 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 08:27:19,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999796981] [2023-08-04 08:27:19,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999796981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:19,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526159200] [2023-08-04 08:27:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:19,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:19,611 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 08:27:19,613 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 08:27:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:19,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:19,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:27:19,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526159200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:19,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726881858] [2023-08-04 08:27:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:19,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:19,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:27:19,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:19,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:19,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:27:19,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:21,033 INFO L124 PetriNetUnfolderBase]: 14107/19553 cut-off events. [2023-08-04 08:27:21,034 INFO L125 PetriNetUnfolderBase]: For 3714/3714 co-relation queries the response was YES. [2023-08-04 08:27:21,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41902 conditions, 19553 events. 14107/19553 cut-off events. For 3714/3714 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 98924 event pairs, 7434 based on Foata normal form. 0/15960 useless extension candidates. Maximal degree in co-relation 37721. Up to 13254 conditions per place. [2023-08-04 08:27:21,094 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 113 selfloop transitions, 3 changer transitions 1/120 dead transitions. [2023-08-04 08:27:21,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 557 flow [2023-08-04 08:27:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1598 transitions. [2023-08-04 08:27:21,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46602508019830857 [2023-08-04 08:27:21,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1598 transitions. [2023-08-04 08:27:21,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1598 transitions. [2023-08-04 08:27:21,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:21,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1598 transitions. [2023-08-04 08:27:21,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 532.6666666666666) internal successors, (1598), 3 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:21,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:21,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:21,110 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 194 flow. Second operand 3 states and 1598 transitions. [2023-08-04 08:27:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 557 flow [2023-08-04 08:27:21,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:21,142 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 210 flow [2023-08-04 08:27:21,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2023-08-04 08:27:21,143 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:27:21,143 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 210 flow [2023-08-04 08:27:21,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:21,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:21,144 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] [2023-08-04 08:27:21,155 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 08:27:21,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:21,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:21,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1810198061, now seen corresponding path program 1 times [2023-08-04 08:27:21,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:21,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633842655] [2023-08-04 08:27:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:21,539 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 08:27:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633842655] [2023-08-04 08:27:21,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633842655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887793231] [2023-08-04 08:27:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:21,541 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 08:27:21,543 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 08:27:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:21,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:21,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:27:21,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887793231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:21,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611155340] [2023-08-04 08:27:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:21,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:27:21,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:21,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:21,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:27:21,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:23,143 INFO L124 PetriNetUnfolderBase]: 15598/21612 cut-off events. [2023-08-04 08:27:23,143 INFO L125 PetriNetUnfolderBase]: For 8463/8463 co-relation queries the response was YES. [2023-08-04 08:27:23,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50546 conditions, 21612 events. 15598/21612 cut-off events. For 8463/8463 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 109876 event pairs, 8325 based on Foata normal form. 0/18883 useless extension candidates. Maximal degree in co-relation 45936. Up to 14690 conditions per place. [2023-08-04 08:27:23,213 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 111 selfloop transitions, 3 changer transitions 1/118 dead transitions. [2023-08-04 08:27:23,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 118 transitions, 571 flow [2023-08-04 08:27:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:27:23,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:27:23,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:27:23,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:27:23,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:23,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:27:23,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:23,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:23,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:23,228 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 210 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:27:23,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 118 transitions, 571 flow [2023-08-04 08:27:23,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:23,248 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 222 flow [2023-08-04 08:27:23,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2023-08-04 08:27:23,248 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-04 08:27:23,249 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 222 flow [2023-08-04 08:27:23,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:23,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:23,249 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] [2023-08-04 08:27:23,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:23,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:23,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:23,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -772128979, now seen corresponding path program 1 times [2023-08-04 08:27:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2457758] [2023-08-04 08:27:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:23,551 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 08:27:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2457758] [2023-08-04 08:27:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2457758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108240054] [2023-08-04 08:27:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:23,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:23,558 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 08:27:23,583 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 08:27:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:23,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:23,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:27:23,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:23,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108240054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:23,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038211085] [2023-08-04 08:27:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:23,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 494 out of 1143 [2023-08-04 08:27:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 494 of 1143 [2023-08-04 08:27:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:25,207 INFO L124 PetriNetUnfolderBase]: 17141/23732 cut-off events. [2023-08-04 08:27:25,207 INFO L125 PetriNetUnfolderBase]: For 11128/11128 co-relation queries the response was YES. [2023-08-04 08:27:25,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58503 conditions, 23732 events. 17141/23732 cut-off events. For 11128/11128 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 119562 event pairs, 9496 based on Foata normal form. 0/21458 useless extension candidates. Maximal degree in co-relation 53006. Up to 16604 conditions per place. [2023-08-04 08:27:25,310 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 109 selfloop transitions, 3 changer transitions 1/116 dead transitions. [2023-08-04 08:27:25,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 116 transitions, 577 flow [2023-08-04 08:27:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:27:25,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:27:25,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:27:25,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:27:25,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:25,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:27:25,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,323 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 222 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:27:25,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 116 transitions, 577 flow [2023-08-04 08:27:25,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 565 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:25,387 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 234 flow [2023-08-04 08:27:25,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-08-04 08:27:25,387 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-04 08:27:25,388 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 234 flow [2023-08-04 08:27:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 503.6666666666667) internal successors, (1511), 3 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:25,388 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] [2023-08-04 08:27:25,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:27:25,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:25,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:25,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash -349259001, now seen corresponding path program 1 times [2023-08-04 08:27:25,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:25,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931894769] [2023-08-04 08:27:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:25,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:25,696 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 08:27:25,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:25,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931894769] [2023-08-04 08:27:25,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931894769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:25,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141995611] [2023-08-04 08:27:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:25,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:25,698 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 08:27:25,700 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 08:27:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:25,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:25,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:25,853 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 08:27:25,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141995611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:25,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:25,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:25,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302132767] [2023-08-04 08:27:25,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:25,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:25,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:25,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:25,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:25,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:25,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:25,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:25,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:25,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:27,505 INFO L124 PetriNetUnfolderBase]: 15472/21401 cut-off events. [2023-08-04 08:27:27,505 INFO L125 PetriNetUnfolderBase]: For 9357/9357 co-relation queries the response was YES. [2023-08-04 08:27:27,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55460 conditions, 21401 events. 15472/21401 cut-off events. For 9357/9357 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 105398 event pairs, 11269 based on Foata normal form. 0/20233 useless extension candidates. Maximal degree in co-relation 50089. Up to 19332 conditions per place. [2023-08-04 08:27:27,603 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 107 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 08:27:27,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 564 flow [2023-08-04 08:27:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1594 transitions. [2023-08-04 08:27:27,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648585593467483 [2023-08-04 08:27:27,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1594 transitions. [2023-08-04 08:27:27,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1594 transitions. [2023-08-04 08:27:27,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:27,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1594 transitions. [2023-08-04 08:27:27,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 531.3333333333334) internal successors, (1594), 3 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:27,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:27,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:27,617 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 234 flow. Second operand 3 states and 1594 transitions. [2023-08-04 08:27:27,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 564 flow [2023-08-04 08:27:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 552 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:27,836 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 240 flow [2023-08-04 08:27:27,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 08:27:27,837 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 08:27:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 240 flow [2023-08-04 08:27:27,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:27,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:27,838 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, 1, 1, 1] [2023-08-04 08:27:27,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:27:28,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:28,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:28,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:28,045 INFO L85 PathProgramCache]: Analyzing trace with hash -667864771, now seen corresponding path program 1 times [2023-08-04 08:27:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502264866] [2023-08-04 08:27:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:28,137 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 08:27:28,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502264866] [2023-08-04 08:27:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502264866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962585984] [2023-08-04 08:27:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:28,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:28,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:28,139 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 08:27:28,142 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 08:27:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:28,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:28,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:28,296 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 08:27:28,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962585984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:28,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:28,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610677359] [2023-08-04 08:27:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:28,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:28,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 497 out of 1143 [2023-08-04 08:27:28,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 497 of 1143 [2023-08-04 08:27:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:29,606 INFO L124 PetriNetUnfolderBase]: 15441/21345 cut-off events. [2023-08-04 08:27:29,606 INFO L125 PetriNetUnfolderBase]: For 7561/7561 co-relation queries the response was YES. [2023-08-04 08:27:29,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54172 conditions, 21345 events. 15441/21345 cut-off events. For 7561/7561 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 105039 event pairs, 12134 based on Foata normal form. 0/19729 useless extension candidates. Maximal degree in co-relation 48932. Up to 20926 conditions per place. [2023-08-04 08:27:29,717 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 101 selfloop transitions, 2 changer transitions 3/109 dead transitions. [2023-08-04 08:27:29,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 109 transitions, 544 flow [2023-08-04 08:27:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1590 transitions. [2023-08-04 08:27:29,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636920384951881 [2023-08-04 08:27:29,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1590 transitions. [2023-08-04 08:27:29,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1590 transitions. [2023-08-04 08:27:29,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:29,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1590 transitions. [2023-08-04 08:27:29,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:29,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:29,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:29,732 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 240 flow. Second operand 3 states and 1590 transitions. [2023-08-04 08:27:29,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 109 transitions, 544 flow [2023-08-04 08:27:29,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 109 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:29,907 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 238 flow [2023-08-04 08:27:29,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-08-04 08:27:29,908 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 08:27:29,908 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 238 flow [2023-08-04 08:27:29,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:29,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:29,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:29,914 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 08:27:30,110 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,SelfDestructingSolverStorable8 [2023-08-04 08:27:30,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:30,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1136138250, now seen corresponding path program 1 times [2023-08-04 08:27:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746921714] [2023-08-04 08:27:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:30,233 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 08:27:30,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746921714] [2023-08-04 08:27:30,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746921714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:30,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919417230] [2023-08-04 08:27:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:30,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:30,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:30,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:27:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:30,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:30,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:30,434 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 08:27:30,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919417230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273594244] [2023-08-04 08:27:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:30,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:30,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1143 [2023-08-04 08:27:30,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:30,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:30,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1143 [2023-08-04 08:27:30,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:31,850 INFO L124 PetriNetUnfolderBase]: 15316/21101 cut-off events. [2023-08-04 08:27:31,850 INFO L125 PetriNetUnfolderBase]: For 7240/7240 co-relation queries the response was YES. [2023-08-04 08:27:31,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53536 conditions, 21101 events. 15316/21101 cut-off events. For 7240/7240 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19498 useless extension candidates. Maximal degree in co-relation 53190. Up to 20802 conditions per place. [2023-08-04 08:27:31,997 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 08:27:31,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 388 flow [2023-08-04 08:27:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1539 transitions. [2023-08-04 08:27:32,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44881889763779526 [2023-08-04 08:27:32,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1539 transitions. [2023-08-04 08:27:32,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1539 transitions. [2023-08-04 08:27:32,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:32,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1539 transitions. [2023-08-04 08:27:32,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.0) internal successors, (1539), 3 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:32,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:32,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1143.0) internal successors, (4572), 4 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:32,008 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 238 flow. Second operand 3 states and 1539 transitions. [2023-08-04 08:27:32,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 388 flow [2023-08-04 08:27:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:32,160 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 246 flow [2023-08-04 08:27:32,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-08-04 08:27:32,161 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-04 08:27:32,161 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 246 flow [2023-08-04 08:27:32,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:32,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:32,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:32,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 08:27:32,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:32,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1997861025, now seen corresponding path program 1 times [2023-08-04 08:27:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037690921] [2023-08-04 08:27:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:32,507 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 08:27:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037690921] [2023-08-04 08:27:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037690921] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935058236] [2023-08-04 08:27:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:32,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:27:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:32,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:32,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:32,684 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 08:27:32,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935058236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:32,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:32,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445295570] [2023-08-04 08:27:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:32,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:32,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:27:32,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:32,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:32,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:27:32,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:34,259 INFO L124 PetriNetUnfolderBase]: 15316/21102 cut-off events. [2023-08-04 08:27:34,259 INFO L125 PetriNetUnfolderBase]: For 7212/7212 co-relation queries the response was YES. [2023-08-04 08:27:34,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53516 conditions, 21102 events. 15316/21102 cut-off events. For 7212/7212 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19499 useless extension candidates. Maximal degree in co-relation 53493. Up to 20801 conditions per place. [2023-08-04 08:27:34,390 INFO L140 encePairwiseOnDemand]: 1138/1143 looper letters, 71 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-04 08:27:34,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 398 flow [2023-08-04 08:27:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-04 08:27:34,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420384951881015 [2023-08-04 08:27:34,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-04 08:27:34,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-04 08:27:34,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:34,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-04 08:27:34,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:34,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:34,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:34,406 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 246 flow. Second operand 4 states and 2021 transitions. [2023-08-04 08:27:34,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 398 flow [2023-08-04 08:27:34,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:34,550 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 260 flow [2023-08-04 08:27:34,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-08-04 08:27:34,551 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 08:27:34,551 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 260 flow [2023-08-04 08:27:34,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 498.75) internal successors, (1995), 4 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:34,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:34,552 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:34,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:34,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:27:34,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:34,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1509021745, now seen corresponding path program 1 times [2023-08-04 08:27:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214952073] [2023-08-04 08:27:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:34,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:34,859 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 08:27:34,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214952073] [2023-08-04 08:27:34,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214952073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:34,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229559428] [2023-08-04 08:27:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:34,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:34,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:34,861 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:34,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:27:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:35,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:35,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:35,049 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 08:27:35,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229559428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827352461] [2023-08-04 08:27:35,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:35,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:35,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:35,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:27:35,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:35,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:35,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:27:35,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:36,555 INFO L124 PetriNetUnfolderBase]: 15316/21103 cut-off events. [2023-08-04 08:27:36,556 INFO L125 PetriNetUnfolderBase]: For 7212/7212 co-relation queries the response was YES. [2023-08-04 08:27:36,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53525 conditions, 21103 events. 15316/21103 cut-off events. For 7212/7212 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19501 useless extension candidates. Maximal degree in co-relation 53493. Up to 20802 conditions per place. [2023-08-04 08:27:36,712 INFO L140 encePairwiseOnDemand]: 1138/1143 looper letters, 72 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-04 08:27:36,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 414 flow [2023-08-04 08:27:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2021 transitions. [2023-08-04 08:27:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420384951881015 [2023-08-04 08:27:36,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2021 transitions. [2023-08-04 08:27:36,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2021 transitions. [2023-08-04 08:27:36,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:36,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2021 transitions. [2023-08-04 08:27:36,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.25) internal successors, (2021), 4 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,727 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 260 flow. Second operand 4 states and 2021 transitions. [2023-08-04 08:27:36,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 414 flow [2023-08-04 08:27:36,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:36,901 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 277 flow [2023-08-04 08:27:36,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-08-04 08:27:36,901 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2023-08-04 08:27:36,901 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 277 flow [2023-08-04 08:27:36,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:36,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:36,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:36,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:37,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:27:37,108 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:37,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:37,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1710784652, now seen corresponding path program 1 times [2023-08-04 08:27:37,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:37,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931365019] [2023-08-04 08:27:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:37,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:37,193 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 08:27:37,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:37,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931365019] [2023-08-04 08:27:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931365019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:37,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583076655] [2023-08-04 08:27:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:37,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:37,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:37,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:27:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:37,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:37,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:27:37,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:37,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583076655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:37,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:37,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151938136] [2023-08-04 08:27:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:37,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:37,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:27:37,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:37,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:37,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:27:37,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:38,742 INFO L124 PetriNetUnfolderBase]: 15316/21104 cut-off events. [2023-08-04 08:27:38,742 INFO L125 PetriNetUnfolderBase]: For 7213/7213 co-relation queries the response was YES. [2023-08-04 08:27:38,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53536 conditions, 21104 events. 15316/21104 cut-off events. For 7213/7213 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19503 useless extension candidates. Maximal degree in co-relation 53500. Up to 20804 conditions per place. [2023-08-04 08:27:38,848 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 74 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2023-08-04 08:27:38,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 433 flow [2023-08-04 08:27:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:27:38,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:27:38,852 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:27:38,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:27:38,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:38,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:27:38,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:38,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:38,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:38,860 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 277 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:27:38,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 433 flow [2023-08-04 08:27:38,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 429 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:38,992 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 287 flow [2023-08-04 08:27:38,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2023-08-04 08:27:38,993 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2023-08-04 08:27:38,993 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 287 flow [2023-08-04 08:27:38,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.25) internal successors, (1997), 4 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:38,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:38,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:39,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:27:39,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:39,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1275390492, now seen corresponding path program 1 times [2023-08-04 08:27:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495677095] [2023-08-04 08:27:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:27:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495677095] [2023-08-04 08:27:39,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495677095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56325787] [2023-08-04 08:27:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:39,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:39,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:39,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:27:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:39,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:39,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:27:39,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:39,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56325787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:39,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:39,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:39,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442546525] [2023-08-04 08:27:39,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:39,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:39,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:39,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:39,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:27:39,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 287 flow. Second operand has 4 states, 4 states have (on average 499.5) internal successors, (1998), 4 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:39,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:39,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:27:39,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:40,806 INFO L124 PetriNetUnfolderBase]: 15316/21105 cut-off events. [2023-08-04 08:27:40,807 INFO L125 PetriNetUnfolderBase]: For 7213/7213 co-relation queries the response was YES. [2023-08-04 08:27:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53543 conditions, 21105 events. 15316/21105 cut-off events. For 7213/7213 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 0/19505 useless extension candidates. Maximal degree in co-relation 53506. Up to 20805 conditions per place. [2023-08-04 08:27:40,985 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 75 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 08:27:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 445 flow [2023-08-04 08:27:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:27:40,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:27:40,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:27:40,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:27:40,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:40,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:27:40,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:40,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:40,996 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:40,996 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 287 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:27:40,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 445 flow [2023-08-04 08:27:41,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 439 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:41,134 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 295 flow [2023-08-04 08:27:41,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-04 08:27:41,135 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2023-08-04 08:27:41,135 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 295 flow [2023-08-04 08:27:41,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.5) internal successors, (1998), 4 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:41,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:41,136 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:41,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:27:41,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:41,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -181932577, now seen corresponding path program 1 times [2023-08-04 08:27:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83060213] [2023-08-04 08:27:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:27:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83060213] [2023-08-04 08:27:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83060213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791260597] [2023-08-04 08:27:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:41,457 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:41,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:27:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:41,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:41,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:27:41,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791260597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052799070] [2023-08-04 08:27:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:41,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1143 [2023-08-04 08:27:41,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 499.75) internal successors, (1999), 4 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:41,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:41,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1143 [2023-08-04 08:27:41,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:43,411 INFO L124 PetriNetUnfolderBase]: 15316/21106 cut-off events. [2023-08-04 08:27:43,412 INFO L125 PetriNetUnfolderBase]: For 7215/7215 co-relation queries the response was YES. [2023-08-04 08:27:43,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 21106 events. 15316/21106 cut-off events. For 7215/7215 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 103453 event pairs, 12084 based on Foata normal form. 1/19508 useless extension candidates. Maximal degree in co-relation 53511. Up to 20806 conditions per place. [2023-08-04 08:27:43,567 INFO L140 encePairwiseOnDemand]: 1139/1143 looper letters, 76 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 08:27:43,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 455 flow [2023-08-04 08:27:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:27:43,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:27:43,571 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:27:43,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:27:43,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:43,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:27:43,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:43,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:43,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:43,577 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 295 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:27:43,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 455 flow [2023-08-04 08:27:43,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 449 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:43,716 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 303 flow [2023-08-04 08:27:43,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-04 08:27:43,717 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2023-08-04 08:27:43,717 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 303 flow [2023-08-04 08:27:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 499.75) internal successors, (1999), 4 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:43,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:43,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:43,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:43,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:43,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 617528814, now seen corresponding path program 1 times [2023-08-04 08:27:43,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:43,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560196346] [2023-08-04 08:27:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:27:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560196346] [2023-08-04 08:27:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560196346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628490135] [2023-08-04 08:27:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:44,069 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:27:44,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:27:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:44,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:27:44,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:27:44,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:27:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:27:44,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628490135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:27:44,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:27:44,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:27:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456591025] [2023-08-04 08:27:44,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:27:44,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:27:44,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:44,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:27:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:44,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 1143 [2023-08-04 08:27:44,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 507.2) internal successors, (2536), 5 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:44,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:44,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 1143 [2023-08-04 08:27:44,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:44,344 INFO L124 PetriNetUnfolderBase]: 28/69 cut-off events. [2023-08-04 08:27:44,344 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 08:27:44,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 69 events. 28/69 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 0 based on Foata normal form. 9/75 useless extension candidates. Maximal degree in co-relation 192. Up to 38 conditions per place. [2023-08-04 08:27:44,344 INFO L140 encePairwiseOnDemand]: 1140/1143 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 08:27:44,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 253 flow [2023-08-04 08:27:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2020 transitions. [2023-08-04 08:27:44,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44181977252843396 [2023-08-04 08:27:44,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2020 transitions. [2023-08-04 08:27:44,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2020 transitions. [2023-08-04 08:27:44,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:44,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2020 transitions. [2023-08-04 08:27:44,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:44,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:44,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1143.0) internal successors, (5715), 5 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:44,354 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 303 flow. Second operand 4 states and 2020 transitions. [2023-08-04 08:27:44,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 253 flow [2023-08-04 08:27:44,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 245 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:27:44,356 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-04 08:27:44,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1143, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-04 08:27:44,356 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2023-08-04 08:27:44,356 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-04 08:27:44,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 507.2) internal successors, (2536), 5 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:44,358 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:27:44,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 08:27:44,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:27:44,559 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:44,561 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:27:44,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,677 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:27:44,677 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:27:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:27:44,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:44,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 500 places, 549 transitions, 1140 flow [2023-08-04 08:27:44,844 INFO L124 PetriNetUnfolderBase]: 138/1169 cut-off events. [2023-08-04 08:27:44,844 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:27:44,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1230 conditions, 1169 events. 138/1169 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5823 event pairs, 0 based on Foata normal form. 0/1021 useless extension candidates. Maximal degree in co-relation 742. Up to 16 conditions per place. [2023-08-04 08:27:44,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 36000 [2023-08-04 08:27:58,517 INFO L134 LiptonReduction]: Checked pairs total: 55933 [2023-08-04 08:27:58,518 INFO L136 LiptonReduction]: Total number of compositions: 592 [2023-08-04 08:27:58,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:27:58,519 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;@2de2246e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:58,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:27:58,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:58,524 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2023-08-04 08:27:58,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:27:58,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:58,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:58,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:27:58,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1871504899, now seen corresponding path program 1 times [2023-08-04 08:27:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:58,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497320440] [2023-08-04 08:27:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:58,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:58,587 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 08:27:58,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:58,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497320440] [2023-08-04 08:27:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497320440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:58,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:27:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473304467] [2023-08-04 08:27:58,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:58,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:58,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:58,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:58,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 1141 [2023-08-04 08:27:58,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:58,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:58,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 1141 [2023-08-04 08:27:58,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:00,012 INFO L124 PetriNetUnfolderBase]: 23687/32501 cut-off events. [2023-08-04 08:28:00,013 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2023-08-04 08:28:00,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65267 conditions, 32501 events. 23687/32501 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 173176 event pairs, 17710 based on Foata normal form. 0/24247 useless extension candidates. Maximal degree in co-relation 57806. Up to 31814 conditions per place. [2023-08-04 08:28:00,119 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 50 selfloop transitions, 2 changer transitions 22/77 dead transitions. [2023-08-04 08:28:00,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 338 flow [2023-08-04 08:28:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1540 transitions. [2023-08-04 08:28:00,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4498977505112474 [2023-08-04 08:28:00,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1540 transitions. [2023-08-04 08:28:00,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1540 transitions. [2023-08-04 08:28:00,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:00,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1540 transitions. [2023-08-04 08:28:00,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 513.3333333333334) internal successors, (1540), 3 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1141.0) internal successors, (4564), 4 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1141.0) internal successors, (4564), 4 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,126 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 196 flow. Second operand 3 states and 1540 transitions. [2023-08-04 08:28:00,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 338 flow [2023-08-04 08:28:00,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:28:00,136 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 135 flow [2023-08-04 08:28:00,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-04 08:28:00,136 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-04 08:28:00,136 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 135 flow [2023-08-04 08:28:00,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 492.3333333333333) internal successors, (1477), 3 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:28:00,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:00,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2034924626, now seen corresponding path program 1 times [2023-08-04 08:28:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452439621] [2023-08-04 08:28:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:00,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:00,208 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 08:28:00,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:00,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452439621] [2023-08-04 08:28:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452439621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:00,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:00,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49004063] [2023-08-04 08:28:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:28:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:28:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:28:00,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:28:00,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:00,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:28:00,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:00,797 INFO L124 PetriNetUnfolderBase]: 6272/8682 cut-off events. [2023-08-04 08:28:00,797 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-08-04 08:28:00,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17558 conditions, 8682 events. 6272/8682 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38561 event pairs, 4732 based on Foata normal form. 0/7052 useless extension candidates. Maximal degree in co-relation 17544. Up to 8644 conditions per place. [2023-08-04 08:28:00,825 INFO L140 encePairwiseOnDemand]: 1136/1141 looper letters, 49 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-04 08:28:00,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 243 flow [2023-08-04 08:28:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:28:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:28:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2002 transitions. [2023-08-04 08:28:00,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386503067484663 [2023-08-04 08:28:00,828 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2002 transitions. [2023-08-04 08:28:00,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2002 transitions. [2023-08-04 08:28:00,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:00,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2002 transitions. [2023-08-04 08:28:00,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.5) internal successors, (2002), 4 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,835 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 135 flow. Second operand 4 states and 2002 transitions. [2023-08-04 08:28:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 243 flow [2023-08-04 08:28:00,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 239 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:00,836 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 149 flow [2023-08-04 08:28:00,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-04 08:28:00,836 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-08-04 08:28:00,836 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 149 flow [2023-08-04 08:28:00,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 489.75) internal successors, (1959), 4 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:00,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:00,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 08:28:00,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:00,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -503765740, now seen corresponding path program 1 times [2023-08-04 08:28:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139175135] [2023-08-04 08:28:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:00,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:00,912 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 08:28:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139175135] [2023-08-04 08:28:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139175135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:00,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694993740] [2023-08-04 08:28:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:28:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:28:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:28:00,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:28:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:00,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:28:00,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:01,476 INFO L124 PetriNetUnfolderBase]: 6272/8700 cut-off events. [2023-08-04 08:28:01,476 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 08:28:01,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17601 conditions, 8700 events. 6272/8700 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38751 event pairs, 4732 based on Foata normal form. 0/7071 useless extension candidates. Maximal degree in co-relation 17578. Up to 8645 conditions per place. [2023-08-04 08:28:01,506 INFO L140 encePairwiseOnDemand]: 1136/1141 looper letters, 50 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 08:28:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 259 flow [2023-08-04 08:28:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:28:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:28:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2002 transitions. [2023-08-04 08:28:01,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386503067484663 [2023-08-04 08:28:01,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2002 transitions. [2023-08-04 08:28:01,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2002 transitions. [2023-08-04 08:28:01,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:01,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2002 transitions. [2023-08-04 08:28:01,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.5) internal successors, (2002), 4 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:01,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:01,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:01,515 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 149 flow. Second operand 4 states and 2002 transitions. [2023-08-04 08:28:01,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 259 flow [2023-08-04 08:28:01,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:01,516 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 166 flow [2023-08-04 08:28:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2023-08-04 08:28:01,517 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-04 08:28:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 166 flow [2023-08-04 08:28:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.0) internal successors, (1960), 4 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 08:28:01,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:01,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -316655413, now seen corresponding path program 1 times [2023-08-04 08:28:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077581664] [2023-08-04 08:28:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:01,594 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 08:28:01,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:01,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077581664] [2023-08-04 08:28:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077581664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:01,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:01,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308942892] [2023-08-04 08:28:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:28:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:01,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:28:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:28:01,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:28:01,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:01,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:28:01,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:02,113 INFO L124 PetriNetUnfolderBase]: 6272/8701 cut-off events. [2023-08-04 08:28:02,113 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-04 08:28:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17612 conditions, 8701 events. 6272/8701 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 38777 event pairs, 4732 based on Foata normal form. 0/7073 useless extension candidates. Maximal degree in co-relation 17585. Up to 8647 conditions per place. [2023-08-04 08:28:02,142 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 52 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-04 08:28:02,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 58 transitions, 278 flow [2023-08-04 08:28:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:28:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:28:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:28:02,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:28:02,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:02,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,150 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,150 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 166 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:28:02,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 58 transitions, 278 flow [2023-08-04 08:28:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:02,152 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 176 flow [2023-08-04 08:28:02,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-08-04 08:28:02,153 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -3 predicate places. [2023-08-04 08:28:02,153 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 176 flow [2023-08-04 08:28:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.25) internal successors, (1961), 4 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:02,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 08:28:02,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:02,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash 258191701, now seen corresponding path program 1 times [2023-08-04 08:28:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961738693] [2023-08-04 08:28:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:02,230 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 08:28:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961738693] [2023-08-04 08:28:02,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961738693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:02,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:02,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:02,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816024714] [2023-08-04 08:28:02,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:02,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:28:02,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:28:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:28:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:28:02,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:02,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:28:02,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:02,762 INFO L124 PetriNetUnfolderBase]: 6272/8702 cut-off events. [2023-08-04 08:28:02,763 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-04 08:28:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 8702 events. 6272/8702 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38809 event pairs, 4732 based on Foata normal form. 0/7075 useless extension candidates. Maximal degree in co-relation 17591. Up to 8648 conditions per place. [2023-08-04 08:28:02,804 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 08:28:02,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 290 flow [2023-08-04 08:28:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:28:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:28:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:28:02,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:28:02,807 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:02,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:28:02,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,812 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 176 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:28:02,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 290 flow [2023-08-04 08:28:02,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 284 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:02,814 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 184 flow [2023-08-04 08:28:02,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-04 08:28:02,814 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-04 08:28:02,814 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 184 flow [2023-08-04 08:28:02,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:02,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:28:02,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:02,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1069168844, now seen corresponding path program 1 times [2023-08-04 08:28:02,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:02,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253304589] [2023-08-04 08:28:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:02,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:02,903 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 08:28:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:02,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253304589] [2023-08-04 08:28:02,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253304589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:02,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:02,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619342726] [2023-08-04 08:28:02,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:02,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:28:02,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:02,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:28:02,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:28:02,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 487 out of 1141 [2023-08-04 08:28:02,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:02,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:02,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 487 of 1141 [2023-08-04 08:28:02,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:03,584 INFO L124 PetriNetUnfolderBase]: 6272/8703 cut-off events. [2023-08-04 08:28:03,585 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 08:28:03,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17625 conditions, 8703 events. 6272/8703 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 38809 event pairs, 4732 based on Foata normal form. 0/7077 useless extension candidates. Maximal degree in co-relation 17596. Up to 8649 conditions per place. [2023-08-04 08:28:03,622 INFO L140 encePairwiseOnDemand]: 1137/1141 looper letters, 54 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 08:28:03,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 300 flow [2023-08-04 08:28:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:28:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:28:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2001 transitions. [2023-08-04 08:28:03,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43843120070113933 [2023-08-04 08:28:03,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2001 transitions. [2023-08-04 08:28:03,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2001 transitions. [2023-08-04 08:28:03,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:03,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2001 transitions. [2023-08-04 08:28:03,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 500.25) internal successors, (2001), 4 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:03,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:03,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1141.0) internal successors, (5705), 5 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:03,631 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 184 flow. Second operand 4 states and 2001 transitions. [2023-08-04 08:28:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 300 flow [2023-08-04 08:28:03,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:28:03,632 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 192 flow [2023-08-04 08:28:03,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1141, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-08-04 08:28:03,633 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-04 08:28:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 192 flow [2023-08-04 08:28:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 490.75) internal successors, (1963), 4 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:03,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:28:03,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:28:03,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash -941918183, now seen corresponding path program 1 times [2023-08-04 08:28:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416620802] [2023-08-04 08:28:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:28:03,683 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:28:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:28:03,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:28:03,739 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:28:03,739 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:28:03,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:28:03,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:28:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:28:03,739 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:03,740 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:28:03,740 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:28:03,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:28:03,787 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:28:03,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:05,092 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 08:28:05,092 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 08:28:05,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 08:28:05,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:05,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:05,240 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:28:05,240 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:05,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:05,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 641 places, 705 transitions, 1500 flow [2023-08-04 08:28:06,239 INFO L124 PetriNetUnfolderBase]: 966/5380 cut-off events. [2023-08-04 08:28:06,239 INFO L125 PetriNetUnfolderBase]: For 602/737 co-relation queries the response was YES. [2023-08-04 08:28:06,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6054 conditions, 5380 events. 966/5380 cut-off events. For 602/737 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46932 event pairs, 22 based on Foata normal form. 0/4649 useless extension candidates. Maximal degree in co-relation 3352. Up to 192 conditions per place. [2023-08-04 08:28:06,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 119520 [2023-08-04 08:28:23,102 INFO L134 LiptonReduction]: Checked pairs total: 274122 [2023-08-04 08:28:23,102 INFO L136 LiptonReduction]: Total number of compositions: 742 [2023-08-04 08:28:23,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:28:23,104 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;@2de2246e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:28:23,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:28:23,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:28:23,107 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 08:28:23,108 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:28:23,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:23,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:28:23,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:23,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 906442185, now seen corresponding path program 1 times [2023-08-04 08:28:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:23,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888151576] [2023-08-04 08:28:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:23,149 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 08:28:23,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888151576] [2023-08-04 08:28:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888151576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:23,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:28:23,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:28:23,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525800969] [2023-08-04 08:28:23,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:23,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:23,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:28:23,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 635 out of 1447 [2023-08-04 08:28:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 639.3333333333334) internal successors, (1918), 3 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:23,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 635 of 1447 [2023-08-04 08:28:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand