/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sum-array-hom.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:33:00,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:33:00,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:33:00,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:33:00,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:33:00,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:33:00,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:33:00,355 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:33:00,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:33:00,358 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:33:00,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:33:00,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:33:00,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:33:00,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:33:00,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:33:00,362 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:33:00,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:33:00,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:33:00,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:33:00,364 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:33:00,364 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:33:00,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:33:00,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:33:00,365 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:33:00,365 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:33:00,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:33:00,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:33:00,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:33:00,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:33:00,509 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:33:00,509 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sum-array-hom.wvr_bound2.c [2023-08-04 09:33:01,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:33:01,555 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:33:01,555 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sum-array-hom.wvr_bound2.c [2023-08-04 09:33:01,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27511232/e4dd29949180424db975dc50baa005cc/FLAG6699c3542 [2023-08-04 09:33:01,568 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27511232/e4dd29949180424db975dc50baa005cc [2023-08-04 09:33:01,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:33:01,570 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:33:01,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:33:01,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:33:01,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:33:01,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad95780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01, skipping insertion in model container [2023-08-04 09:33:01,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,593 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:33:01,720 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sum-array-hom.wvr_bound2.c[2639,2652] [2023-08-04 09:33:01,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:33:01,729 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:33:01,744 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sum-array-hom.wvr_bound2.c[2639,2652] [2023-08-04 09:33:01,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:33:01,755 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:33:01,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01 WrapperNode [2023-08-04 09:33:01,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:33:01,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:33:01,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:33:01,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:33:01,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,782 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,805 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 153 [2023-08-04 09:33:01,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:33:01,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:33:01,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:33:01,807 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:33:01,814 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:33:01,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:33:01,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:33:01,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:33:01,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (1/1) ... [2023-08-04 09:33:01,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:33:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:01,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:33:01,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:33:01,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:33:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:33:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:33:01,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:33:01,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:33:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:33:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:33:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:33:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:33:01,887 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:33:01,964 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:33:01,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:33:02,200 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:33:02,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:33:02,208 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:33:02,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:33:02 BoogieIcfgContainer [2023-08-04 09:33:02,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:33:02,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:33:02,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:33:02,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:33:02,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:33:01" (1/3) ... [2023-08-04 09:33:02,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78594639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:33:02, skipping insertion in model container [2023-08-04 09:33:02,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:01" (2/3) ... [2023-08-04 09:33:02,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78594639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:33:02, skipping insertion in model container [2023-08-04 09:33:02,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:33:02" (3/3) ... [2023-08-04 09:33:02,214 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-sum-array-hom.wvr_bound2.c [2023-08-04 09:33:02,219 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:33:02,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:33:02,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:33:02,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:33:02,295 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:33:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,469 INFO L124 PetriNetUnfolderBase]: 101/675 cut-off events. [2023-08-04 09:33:02,469 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:02,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 101/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3367 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 392. Up to 16 conditions per place. [2023-08-04 09:33:02,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:02,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:02,546 INFO L124 PetriNetUnfolderBase]: 101/675 cut-off events. [2023-08-04 09:33:02,546 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 101/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3367 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 392. Up to 16 conditions per place. [2023-08-04 09:33:02,557 INFO L119 LiptonReduction]: Number of co-enabled transitions 6408 [2023-08-04 09:33:06,443 INFO L134 LiptonReduction]: Checked pairs total: 12087 [2023-08-04 09:33:06,444 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-04 09:33:06,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:33:06,465 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;@21f0e058, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:06,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:33:06,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:06,470 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-08-04 09:33:06,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:33:06,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:06,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:06,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:06,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1415453114, now seen corresponding path program 1 times [2023-08-04 09:33:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498479888] [2023-08-04 09:33:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:33:06,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:06,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498479888] [2023-08-04 09:33:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498479888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:06,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:33:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:33:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408417052] [2023-08-04 09:33:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:33:06,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:06,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:07,142 INFO L124 PetriNetUnfolderBase]: 4152/5800 cut-off events. [2023-08-04 09:33:07,142 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-08-04 09:33:07,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11681 conditions, 5800 events. 4152/5800 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29357 event pairs, 2338 based on Foata normal form. 0/3688 useless extension candidates. Maximal degree in co-relation 9827. Up to 5535 conditions per place. [2023-08-04 09:33:07,169 INFO L140 encePairwiseOnDemand]: 371/375 looper letters, 43 selfloop transitions, 2 changer transitions 4/55 dead transitions. [2023-08-04 09:33:07,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 244 flow [2023-08-04 09:33:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-04 09:33:07,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49066666666666664 [2023-08-04 09:33:07,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-04 09:33:07,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-04 09:33:07,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:07,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-04 09:33:07,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,202 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 146 flow. Second operand 3 states and 552 transitions. [2023-08-04 09:33:07,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 244 flow [2023-08-04 09:33:07,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:33:07,208 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 140 flow [2023-08-04 09:33:07,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-04 09:33:07,213 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 09:33:07,213 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 140 flow [2023-08-04 09:33:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:07,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:33:07,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:07,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2118869563, now seen corresponding path program 1 times [2023-08-04 09:33:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:07,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907537010] [2023-08-04 09:33:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:33:07,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907537010] [2023-08-04 09:33:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907537010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:07,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788275887] [2023-08-04 09:33:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:07,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:07,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:07,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:33:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:07,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:07,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:33:07,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788275887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:07,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490288118] [2023-08-04 09:33:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:07,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:07,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:07,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:07,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:07,694 INFO L124 PetriNetUnfolderBase]: 4006/5533 cut-off events. [2023-08-04 09:33:07,695 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-08-04 09:33:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11156 conditions, 5533 events. 4006/5533 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27403 event pairs, 1740 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 9301. Up to 5290 conditions per place. [2023-08-04 09:33:07,724 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 46 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-04 09:33:07,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2023-08-04 09:33:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-04 09:33:07,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49244444444444446 [2023-08-04 09:33:07,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-04 09:33:07,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-04 09:33:07,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:07,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-04 09:33:07,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,731 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 140 flow. Second operand 3 states and 554 transitions. [2023-08-04 09:33:07,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2023-08-04 09:33:07,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:33:07,734 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 132 flow [2023-08-04 09:33:07,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 09:33:07,735 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-04 09:33:07,735 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 132 flow [2023-08-04 09:33:07,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:07,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:07,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:07,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:33:07,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:07,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:07,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1391469129, now seen corresponding path program 1 times [2023-08-04 09:33:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61008732] [2023-08-04 09:33:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:33:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61008732] [2023-08-04 09:33:08,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61008732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676760942] [2023-08-04 09:33:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:08,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:08,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:08,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:33:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:08,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:08,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:33:08,091 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:08,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676760942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:08,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:08,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:08,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806633328] [2023-08-04 09:33:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:08,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:08,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:08,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:08,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:08,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:08,447 INFO L124 PetriNetUnfolderBase]: 3990/5526 cut-off events. [2023-08-04 09:33:08,447 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-04 09:33:08,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11153 conditions, 5526 events. 3990/5526 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27551 event pairs, 1700 based on Foata normal form. 0/3535 useless extension candidates. Maximal degree in co-relation 4884. Up to 5027 conditions per place. [2023-08-04 09:33:08,483 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 49 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 09:33:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 256 flow [2023-08-04 09:33:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 09:33:08,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951111111111111 [2023-08-04 09:33:08,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 09:33:08,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 09:33:08,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:08,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 09:33:08,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,492 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 132 flow. Second operand 3 states and 557 transitions. [2023-08-04 09:33:08,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 256 flow [2023-08-04 09:33:08,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:33:08,495 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 136 flow [2023-08-04 09:33:08,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2023-08-04 09:33:08,496 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-08-04 09:33:08,496 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 136 flow [2023-08-04 09:33:08,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:08,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:08,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:33:08,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:08,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1569529955, now seen corresponding path program 1 times [2023-08-04 09:33:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852520937] [2023-08-04 09:33:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:33:08,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852520937] [2023-08-04 09:33:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852520937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666625294] [2023-08-04 09:33:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:08,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:08,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:33:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:08,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:08,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:33:08,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666625294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:08,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54494988] [2023-08-04 09:33:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:08,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:08,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:08,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:08,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:08,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:09,006 INFO L124 PetriNetUnfolderBase]: 2454/3478 cut-off events. [2023-08-04 09:33:09,006 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-04 09:33:09,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 3478 events. 2454/3478 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15900 event pairs, 1051 based on Foata normal form. 0/2319 useless extension candidates. Maximal degree in co-relation 2998. Up to 2595 conditions per place. [2023-08-04 09:33:09,021 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:33:09,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 282 flow [2023-08-04 09:33:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 09:33:09,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49866666666666665 [2023-08-04 09:33:09,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:09,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,031 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 136 flow. Second operand 3 states and 561 transitions. [2023-08-04 09:33:09,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 282 flow [2023-08-04 09:33:09,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:33:09,034 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 144 flow [2023-08-04 09:33:09,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-04 09:33:09,035 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-04 09:33:09,035 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 144 flow [2023-08-04 09:33:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:09,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:09,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:09,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:09,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:09,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash 822555311, now seen corresponding path program 1 times [2023-08-04 09:33:09,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:09,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537739791] [2023-08-04 09:33:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:09,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:33:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537739791] [2023-08-04 09:33:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537739791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562902962] [2023-08-04 09:33:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:09,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:09,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:09,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:33:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:09,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:09,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:09,371 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 09:33:09,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:09,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562902962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:09,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:09,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043149986] [2023-08-04 09:33:09,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:09,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:09,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:09,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:09,538 INFO L124 PetriNetUnfolderBase]: 2075/2959 cut-off events. [2023-08-04 09:33:09,538 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2023-08-04 09:33:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6341 conditions, 2959 events. 2075/2959 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13089 event pairs, 1046 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 2682. Up to 2429 conditions per place. [2023-08-04 09:33:09,548 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 09:33:09,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 292 flow [2023-08-04 09:33:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 09:33:09,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49866666666666665 [2023-08-04 09:33:09,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:09,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 09:33:09,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,553 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 144 flow. Second operand 3 states and 561 transitions. [2023-08-04 09:33:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 292 flow [2023-08-04 09:33:09,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:09,556 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 154 flow [2023-08-04 09:33:09,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-08-04 09:33:09,557 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 09:33:09,557 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 154 flow [2023-08-04 09:33:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:09,557 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] [2023-08-04 09:33:09,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:09,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:09,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:09,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash 87211524, now seen corresponding path program 1 times [2023-08-04 09:33:09,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:09,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986250807] [2023-08-04 09:33:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:09,803 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 09:33:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:09,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986250807] [2023-08-04 09:33:09,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986250807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:09,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548793040] [2023-08-04 09:33:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:09,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:09,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:09,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:09,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:33:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:09,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:09,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:09,876 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 09:33:09,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548793040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:09,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:33:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994162345] [2023-08-04 09:33:09,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:09,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:09,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:09,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 375 [2023-08-04 09:33:09,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:09,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:09,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 375 [2023-08-04 09:33:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:10,041 INFO L124 PetriNetUnfolderBase]: 2059/2933 cut-off events. [2023-08-04 09:33:10,041 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-04 09:33:10,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6343 conditions, 2933 events. 2059/2933 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12959 event pairs, 1191 based on Foata normal form. 0/2100 useless extension candidates. Maximal degree in co-relation 5010. Up to 2778 conditions per place. [2023-08-04 09:33:10,049 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 49 selfloop transitions, 2 changer transitions 3/60 dead transitions. [2023-08-04 09:33:10,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 282 flow [2023-08-04 09:33:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 09:33:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951111111111111 [2023-08-04 09:33:10,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 09:33:10,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 09:33:10,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:10,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 09:33:10,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,054 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 154 flow. Second operand 3 states and 557 transitions. [2023-08-04 09:33:10,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 282 flow [2023-08-04 09:33:10,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:10,060 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 152 flow [2023-08-04 09:33:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-08-04 09:33:10,060 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 09:33:10,060 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 152 flow [2023-08-04 09:33:10,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:10,061 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] [2023-08-04 09:33:10,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:10,266 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 09:33:10,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:10,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1433178564, now seen corresponding path program 1 times [2023-08-04 09:33:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:10,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518709499] [2023-08-04 09:33:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:10,305 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 09:33:10,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:10,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518709499] [2023-08-04 09:33:10,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518709499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:10,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959765804] [2023-08-04 09:33:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:10,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:10,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:10,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:33:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:10,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:33:10,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:10,399 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 09:33:10,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:33:10,429 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 09:33:10,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959765804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:33:10,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:33:10,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:33:10,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84738535] [2023-08-04 09:33:10,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:33:10,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:33:10,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:10,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:33:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:10,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 375 [2023-08-04 09:33:10,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:10,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 375 [2023-08-04 09:33:10,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:10,464 INFO L124 PetriNetUnfolderBase]: 11/26 cut-off events. [2023-08-04 09:33:10,464 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:33:10,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 26 events. 11/26 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 36 event pairs, 3 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 55. Up to 17 conditions per place. [2023-08-04 09:33:10,464 INFO L140 encePairwiseOnDemand]: 372/375 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:33:10,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 58 flow [2023-08-04 09:33:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:33:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:33:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 682 transitions. [2023-08-04 09:33:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2023-08-04 09:33:10,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 682 transitions. [2023-08-04 09:33:10,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 682 transitions. [2023-08-04 09:33:10,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:10,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 682 transitions. [2023-08-04 09:33:10,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.5) internal successors, (682), 4 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,469 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 375.0) internal successors, (1875), 5 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,469 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 152 flow. Second operand 4 states and 682 transitions. [2023-08-04 09:33:10,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 58 flow [2023-08-04 09:33:10,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:10,470 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:33:10,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 09:33:10,470 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -25 predicate places. [2023-08-04 09:33:10,470 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:33:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:10,472 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:33:10,479 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 09:33:10,677 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 09:33:10,677 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:10,679 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:33:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,712 INFO L124 PetriNetUnfolderBase]: 101/675 cut-off events. [2023-08-04 09:33:10,713 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:10,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 101/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3367 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 392. Up to 16 conditions per place. [2023-08-04 09:33:10,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,716 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:10,716 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 199 transitions, 440 flow [2023-08-04 09:33:10,746 INFO L124 PetriNetUnfolderBase]: 101/675 cut-off events. [2023-08-04 09:33:10,747 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:10,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 101/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3367 event pairs, 0 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 392. Up to 16 conditions per place. [2023-08-04 09:33:10,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 6408 [2023-08-04 09:33:14,450 INFO L134 LiptonReduction]: Checked pairs total: 12087 [2023-08-04 09:33:14,450 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-04 09:33:14,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:33:14,451 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;@21f0e058, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:14,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:33:14,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:14,453 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:33:14,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:33:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:33:14,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:33:14,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1240519197, now seen corresponding path program 1 times [2023-08-04 09:33:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705566019] [2023-08-04 09:33:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:33:14,488 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:33:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:33:14,514 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:33:14,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:33:14,514 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:33:14,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:33:14,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:33:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:33:14,515 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:33:14,515 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:33:14,516 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:33:14,516 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:33:14,537 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:33:14,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:14,856 INFO L124 PetriNetUnfolderBase]: 891/4202 cut-off events. [2023-08-04 09:33:14,856 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:33:14,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 4202 events. 891/4202 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33762 event pairs, 22 based on Foata normal form. 0/3555 useless extension candidates. Maximal degree in co-relation 2489. Up to 192 conditions per place. [2023-08-04 09:33:14,889 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:14,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:14,941 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:14,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:14,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:14,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 247 transitions, 584 flow [2023-08-04 09:33:15,306 INFO L124 PetriNetUnfolderBase]: 891/4202 cut-off events. [2023-08-04 09:33:15,307 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:33:15,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 4202 events. 891/4202 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33762 event pairs, 22 based on Foata normal form. 0/3555 useless extension candidates. Maximal degree in co-relation 2489. Up to 192 conditions per place. [2023-08-04 09:33:15,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 16920 [2023-08-04 09:33:19,461 INFO L134 LiptonReduction]: Checked pairs total: 37780 [2023-08-04 09:33:19,461 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-08-04 09:33:19,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:33:19,463 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;@21f0e058, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:19,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:33:19,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:19,465 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:33:19,465 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:33:19,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:19,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:19,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:19,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1984470979, now seen corresponding path program 1 times [2023-08-04 09:33:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:19,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925975298] [2023-08-04 09:33:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:33:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925975298] [2023-08-04 09:33:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925975298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:19,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:33:19,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:33:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794033015] [2023-08-04 09:33:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:19,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:33:19,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 443 [2023-08-04 09:33:19,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:19,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:19,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 443 [2023-08-04 09:33:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:34:23,410 INFO L124 PetriNetUnfolderBase]: 1058173/1258938 cut-off events. [2023-08-04 09:34:23,410 INFO L125 PetriNetUnfolderBase]: For 125385/125385 co-relation queries the response was YES. [2023-08-04 09:34:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551514 conditions, 1258938 events. 1058173/1258938 cut-off events. For 125385/125385 co-relation queries the response was YES. Maximal size of possible extension queue 24674. Compared 6757112 event pairs, 534175 based on Foata normal form. 0/796883 useless extension candidates. Maximal degree in co-relation 925274. Up to 1228533 conditions per place. [2023-08-04 09:34:31,924 INFO L140 encePairwiseOnDemand]: 439/443 looper letters, 66 selfloop transitions, 2 changer transitions 3/83 dead transitions. [2023-08-04 09:34:31,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 392 flow [2023-08-04 09:34:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:34:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:34:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-04 09:34:31,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063957863054929 [2023-08-04 09:34:31,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-04 09:34:31,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-04 09:34:31,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:34:31,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-04 09:34:31,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:34:31,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:34:31,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:34:31,938 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 248 flow. Second operand 3 states and 673 transitions. [2023-08-04 09:34:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 392 flow [2023-08-04 09:34:32,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:34:32,054 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 240 flow [2023-08-04 09:34:32,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 09:34:32,056 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-04 09:34:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 240 flow [2023-08-04 09:34:32,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:34:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:34:32,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:34:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:34:32,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:34:32,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:34:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 679796776, now seen corresponding path program 1 times [2023-08-04 09:34:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:34:32,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852769068] [2023-08-04 09:34:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:34:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:34:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:34:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:34:32,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:34:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852769068] [2023-08-04 09:34:32,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852769068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:34:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716932839] [2023-08-04 09:34:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:34:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:34:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:34:32,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:34:32,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:34:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:34:32,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:34:32,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:34:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:34:32,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:34:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716932839] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:34:32,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:34:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:34:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100978248] [2023-08-04 09:34:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:34:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:34:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:34:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:34:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:34:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 443 [2023-08-04 09:34:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:34:32,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:34:32,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 443 [2023-08-04 09:34:32,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand