/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-vector-add.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:33:23,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:33:23,568 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:33:23,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:33:23,574 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:33:23,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:33:23,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:33:23,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:33:23,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:33:23,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:33:23,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:33:23,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:33:23,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:33:23,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:33:23,617 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:33:23,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:33:23,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:33:23,617 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:33:23,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:33:23,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:33:23,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:33:23,618 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:33:23,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:33:23,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:33:23,619 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:33:23,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:33:23,619 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:33:23,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:33:23,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:33:23,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:33:23,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:33:23,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:33:23,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:33:23,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:33:23,623 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:33:23,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:33:23,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:33:23,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:33:23,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:33:23,860 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:33:23,865 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:33:23,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 09:33:25,022 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:33:25,186 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:33:25,187 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 09:33:25,194 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b22de941/f0c8f39a101d429984b01bbe172a9476/FLAGe89e1c46c [2023-08-04 09:33:25,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b22de941/f0c8f39a101d429984b01bbe172a9476 [2023-08-04 09:33:25,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:33:25,211 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:33:25,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:33:25,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:33:25,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:33:25,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dcfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25, skipping insertion in model container [2023-08-04 09:33:25,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,239 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:33:25,373 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-vector-add.wvr_bound2.c[2841,2854] [2023-08-04 09:33:25,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:33:25,387 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:33:25,421 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-vector-add.wvr_bound2.c[2841,2854] [2023-08-04 09:33:25,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:33:25,437 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:33:25,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25 WrapperNode [2023-08-04 09:33:25,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:33:25,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:33:25,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:33:25,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:33:25,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,454 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,479 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 11, calls inlined = 17, statements flattened = 248 [2023-08-04 09:33:25,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:33:25,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:33:25,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:33:25,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:33:25,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,520 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,524 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:33:25,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:33:25,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:33:25,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:33:25,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (1/1) ... [2023-08-04 09:33:25,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:33:25,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:25,564 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 09:33:25,589 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 09:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:33:25,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:33:25,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:33:25,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:33:25,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:33:25,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:33:25,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:33:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:33:25,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:33:25,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:33:25,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:33:25,611 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 09:33:25,739 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:33:25,742 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:33:26,186 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:33:26,193 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:33:26,194 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-08-04 09:33:26,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:33:26 BoogieIcfgContainer [2023-08-04 09:33:26,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:33:26,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:33:26,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:33:26,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:33:26,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:33:25" (1/3) ... [2023-08-04 09:33:26,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2cf20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:33:26, skipping insertion in model container [2023-08-04 09:33:26,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:33:25" (2/3) ... [2023-08-04 09:33:26,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2cf20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:33:26, skipping insertion in model container [2023-08-04 09:33:26,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:33:26" (3/3) ... [2023-08-04 09:33:26,204 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-vector-add.wvr_bound2.c [2023-08-04 09:33:26,211 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:33:26,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:33:26,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:33:26,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:33:26,358 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:33:26,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,664 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 09:33:26,664 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:26,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 09:33:26,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:26,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:26,832 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 09:33:26,833 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:26,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 09:33:26,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 8820 [2023-08-04 09:33:34,348 INFO L134 LiptonReduction]: Checked pairs total: 18870 [2023-08-04 09:33:34,348 INFO L136 LiptonReduction]: Total number of compositions: 313 [2023-08-04 09:33:34,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:33:34,365 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;@22f0dbbf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:34,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:33:34,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:34,375 INFO L124 PetriNetUnfolderBase]: 7/57 cut-off events. [2023-08-04 09:33:34,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:33:34,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:34,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:34,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:34,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2061316124, now seen corresponding path program 1 times [2023-08-04 09:33:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425428266] [2023-08-04 09:33:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:34,719 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 09:33:34,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:34,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425428266] [2023-08-04 09:33:34,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425428266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:34,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:33:34,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:33:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059216578] [2023-08-04 09:33:34,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:33:34,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:34,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 64 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:34,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:34,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:34,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:35,431 INFO L124 PetriNetUnfolderBase]: 4905/6820 cut-off events. [2023-08-04 09:33:35,432 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2023-08-04 09:33:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13709 conditions, 6820 events. 4905/6820 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34692 event pairs, 2124 based on Foata normal form. 0/4374 useless extension candidates. Maximal degree in co-relation 11548. Up to 6541 conditions per place. [2023-08-04 09:33:35,476 INFO L140 encePairwiseOnDemand]: 628/633 looper letters, 51 selfloop transitions, 2 changer transitions 4/66 dead transitions. [2023-08-04 09:33:35,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 282 flow [2023-08-04 09:33:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 894 transitions. [2023-08-04 09:33:35,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707740916271722 [2023-08-04 09:33:35,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 894 transitions. [2023-08-04 09:33:35,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 894 transitions. [2023-08-04 09:33:35,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:35,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 894 transitions. [2023-08-04 09:33:35,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:35,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:35,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:35,523 INFO L175 Difference]: Start difference. First operand has 54 places, 64 transitions, 170 flow. Second operand 3 states and 894 transitions. [2023-08-04 09:33:35,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 282 flow [2023-08-04 09:33:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:33:35,531 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 162 flow [2023-08-04 09:33:35,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-04 09:33:35,538 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 09:33:35,539 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 162 flow [2023-08-04 09:33:35,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:35,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:35,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:35,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:33:35,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:35,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1607170416, now seen corresponding path program 1 times [2023-08-04 09:33:35,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:35,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476060767] [2023-08-04 09:33:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:35,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:35,742 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 09:33:35,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:35,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476060767] [2023-08-04 09:33:35,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476060767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857031351] [2023-08-04 09:33:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:35,753 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 09:33:35,773 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 09:33:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:35,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:35,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:35,899 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 09:33:35,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:35,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857031351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:35,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:35,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:35,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605920090] [2023-08-04 09:33:35,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:35,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:35,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:35,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:35,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:35,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:35,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:35,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:36,484 INFO L124 PetriNetUnfolderBase]: 4759/6551 cut-off events. [2023-08-04 09:33:36,484 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-08-04 09:33:36,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13180 conditions, 6551 events. 4759/6551 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33295 event pairs, 2090 based on Foata normal form. 0/4193 useless extension candidates. Maximal degree in co-relation 11018. Up to 6296 conditions per place. [2023-08-04 09:33:36,520 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 54 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 09:33:36,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 290 flow [2023-08-04 09:33:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2023-08-04 09:33:36,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47130068457082674 [2023-08-04 09:33:36,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2023-08-04 09:33:36,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2023-08-04 09:33:36,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:36,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2023-08-04 09:33:36,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:36,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:36,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:36,537 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 162 flow. Second operand 3 states and 895 transitions. [2023-08-04 09:33:36,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 290 flow [2023-08-04 09:33:36,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 274 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:33:36,542 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 154 flow [2023-08-04 09:33:36,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2023-08-04 09:33:36,543 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-08-04 09:33:36,543 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 154 flow [2023-08-04 09:33:36,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:36,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:36,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:36,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:36,750 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 09:33:36,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:36,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1598668540, now seen corresponding path program 1 times [2023-08-04 09:33:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967998178] [2023-08-04 09:33:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:36,830 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 09:33:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967998178] [2023-08-04 09:33:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967998178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:36,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583765176] [2023-08-04 09:33:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:36,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:36,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:36,832 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 09:33:36,854 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 09:33:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:36,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:36,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:36,949 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 09:33:36,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583765176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:36,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:36,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323716062] [2023-08-04 09:33:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:36,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:36,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:36,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:36,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:36,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:36,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:36,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:37,460 INFO L124 PetriNetUnfolderBase]: 4743/6601 cut-off events. [2023-08-04 09:33:37,460 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 09:33:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13234 conditions, 6601 events. 4743/6601 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33990 event pairs, 2586 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 5819. Up to 6033 conditions per place. [2023-08-04 09:33:37,488 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 57 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 09:33:37,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 294 flow [2023-08-04 09:33:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-04 09:33:37,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728804634017904 [2023-08-04 09:33:37,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-04 09:33:37,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-04 09:33:37,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:37,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-04 09:33:37,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:37,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:37,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:37,498 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 154 flow. Second operand 3 states and 898 transitions. [2023-08-04 09:33:37,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 294 flow [2023-08-04 09:33:37,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 69 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:33:37,500 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 158 flow [2023-08-04 09:33:37,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2023-08-04 09:33:37,501 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-04 09:33:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 158 flow [2023-08-04 09:33:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:37,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:37,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:37,511 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 09:33:37,708 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 09:33:37,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:37,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -687890029, now seen corresponding path program 1 times [2023-08-04 09:33:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996650119] [2023-08-04 09:33:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:37,773 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 09:33:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996650119] [2023-08-04 09:33:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996650119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17283396] [2023-08-04 09:33:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:37,777 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 09:33:37,799 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 09:33:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:37,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:37,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:37,896 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 09:33:37,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17283396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:37,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:37,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214927978] [2023-08-04 09:33:37,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:37,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:37,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:37,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:37,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:37,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:38,206 INFO L124 PetriNetUnfolderBase]: 2727/3897 cut-off events. [2023-08-04 09:33:38,206 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-08-04 09:33:38,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8035 conditions, 3897 events. 2727/3897 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19016 event pairs, 1213 based on Foata normal form. 0/2607 useless extension candidates. Maximal degree in co-relation 3269. Up to 2993 conditions per place. [2023-08-04 09:33:38,231 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:33:38,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 320 flow [2023-08-04 09:33:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-08-04 09:33:38,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47498683517640866 [2023-08-04 09:33:38,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:38,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,245 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 158 flow. Second operand 3 states and 902 transitions. [2023-08-04 09:33:38,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 320 flow [2023-08-04 09:33:38,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:33:38,249 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 166 flow [2023-08-04 09:33:38,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-04 09:33:38,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-08-04 09:33:38,251 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 166 flow [2023-08-04 09:33:38,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:38,252 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] [2023-08-04 09:33:38,260 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 09:33:38,457 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 09:33:38,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:38,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1808785797, now seen corresponding path program 1 times [2023-08-04 09:33:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:38,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183657700] [2023-08-04 09:33:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:38,544 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 09:33:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183657700] [2023-08-04 09:33:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183657700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307194709] [2023-08-04 09:33:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:38,548 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 09:33:38,551 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 09:33:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:38,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:38,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:38,678 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 09:33:38,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307194709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:38,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:38,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120645612] [2023-08-04 09:33:38,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:38,964 INFO L124 PetriNetUnfolderBase]: 2108/3042 cut-off events. [2023-08-04 09:33:38,964 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2023-08-04 09:33:38,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6486 conditions, 3042 events. 2108/3042 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14167 event pairs, 1064 based on Foata normal form. 0/2127 useless extension candidates. Maximal degree in co-relation 2713. Up to 2491 conditions per place. [2023-08-04 09:33:38,979 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 63 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 09:33:38,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 330 flow [2023-08-04 09:33:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 902 transitions. [2023-08-04 09:33:38,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47498683517640866 [2023-08-04 09:33:38,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:38,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 902 transitions. [2023-08-04 09:33:38,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,989 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 166 flow. Second operand 3 states and 902 transitions. [2023-08-04 09:33:38,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 330 flow [2023-08-04 09:33:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:38,996 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 176 flow [2023-08-04 09:33:38,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-08-04 09:33:38,998 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-04 09:33:38,998 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 176 flow [2023-08-04 09:33:38,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:38,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:38,999 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] [2023-08-04 09:33:39,011 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 09:33:39,205 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 09:33:39,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:39,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1907073625, now seen corresponding path program 1 times [2023-08-04 09:33:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800796640] [2023-08-04 09:33:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:39,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:39,290 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 09:33:39,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800796640] [2023-08-04 09:33:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800796640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029217342] [2023-08-04 09:33:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:39,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:39,292 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 09:33:39,295 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 09:33:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:39,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:33:39,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:39,421 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 09:33:39,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:33:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029217342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:39,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:33:39,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:33:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891988210] [2023-08-04 09:33:39,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:39,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:39,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:39,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 633 [2023-08-04 09:33:39,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:39,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:39,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 633 [2023-08-04 09:33:39,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:39,678 INFO L124 PetriNetUnfolderBase]: 2062/2962 cut-off events. [2023-08-04 09:33:39,678 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-08-04 09:33:39,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6380 conditions, 2962 events. 2062/2962 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13639 event pairs, 1191 based on Foata normal form. 0/2090 useless extension candidates. Maximal degree in co-relation 5043. Up to 2786 conditions per place. [2023-08-04 09:33:39,692 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 57 selfloop transitions, 2 changer transitions 3/71 dead transitions. [2023-08-04 09:33:39,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 320 flow [2023-08-04 09:33:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:33:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:33:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-04 09:33:39,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728804634017904 [2023-08-04 09:33:39,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-04 09:33:39,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-04 09:33:39,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:39,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-04 09:33:39,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:39,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:39,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 633.0) internal successors, (2532), 4 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:39,702 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 176 flow. Second operand 3 states and 898 transitions. [2023-08-04 09:33:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 320 flow [2023-08-04 09:33:39,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:39,710 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 174 flow [2023-08-04 09:33:39,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2023-08-04 09:33:39,712 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-04 09:33:39,713 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 174 flow [2023-08-04 09:33:39,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:39,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:39,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:39,724 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 09:33:39,922 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 09:33:39,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:39,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1888613112, now seen corresponding path program 1 times [2023-08-04 09:33:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:39,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799827619] [2023-08-04 09:33:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:39,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:40,012 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 09:33:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:40,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799827619] [2023-08-04 09:33:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799827619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782366367] [2023-08-04 09:33:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:40,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:40,020 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 09:33:40,040 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 09:33:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:40,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:33:40,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:40,176 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 09:33:40,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:33:40,197 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 09:33:40,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782366367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:33:40,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:33:40,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:33:40,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124962788] [2023-08-04 09:33:40,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:33:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:33:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:33:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:40,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 633 [2023-08-04 09:33:40,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 285.8) internal successors, (1429), 5 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:40,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:40,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 633 [2023-08-04 09:33:40,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:40,251 INFO L124 PetriNetUnfolderBase]: 14/33 cut-off events. [2023-08-04 09:33:40,251 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:33:40,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 33 events. 14/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 1 based on Foata normal form. 4/29 useless extension candidates. Maximal degree in co-relation 68. Up to 17 conditions per place. [2023-08-04 09:33:40,252 INFO L140 encePairwiseOnDemand]: 630/633 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 09:33:40,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 84 flow [2023-08-04 09:33:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:33:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:33:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1132 transitions. [2023-08-04 09:33:40,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470774091627172 [2023-08-04 09:33:40,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1132 transitions. [2023-08-04 09:33:40,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1132 transitions. [2023-08-04 09:33:40,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:40,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1132 transitions. [2023-08-04 09:33:40,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:40,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:40,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 633.0) internal successors, (3165), 5 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:40,263 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 174 flow. Second operand 4 states and 1132 transitions. [2023-08-04 09:33:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 84 flow [2023-08-04 09:33:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:40,264 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:33:40,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:33:40,265 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -29 predicate places. [2023-08-04 09:33:40,265 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:33:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 285.8) internal successors, (1429), 5 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:40,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:33:40,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:40,477 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 09:33:40,477 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:40,479 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:33:40,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,578 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 09:33:40,579 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:40,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 09:33:40,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:40,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 320 transitions, 682 flow [2023-08-04 09:33:40,675 INFO L124 PetriNetUnfolderBase]: 121/902 cut-off events. [2023-08-04 09:33:40,675 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:33:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 902 events. 121/902 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4238 event pairs, 0 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 543. Up to 16 conditions per place. [2023-08-04 09:33:40,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 8820 [2023-08-04 09:33:47,448 INFO L134 LiptonReduction]: Checked pairs total: 18867 [2023-08-04 09:33:47,449 INFO L136 LiptonReduction]: Total number of compositions: 314 [2023-08-04 09:33:47,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:33:47,450 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;@22f0dbbf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:47,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:33:47,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:47,455 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 09:33:47,455 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:33:47,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:47,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:47,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:33:47,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -639761702, now seen corresponding path program 1 times [2023-08-04 09:33:47,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:47,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268936085] [2023-08-04 09:33:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:47,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:33:47,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:33:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:33:47,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:33:47,613 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:33:47,613 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:33:47,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:33:47,614 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:33:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:33:47,614 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:33:47,615 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:33:47,615 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:33:47,615 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:33:47,647 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:33:47,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:48,344 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 09:33:48,344 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:33:48,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 09:33:48,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:48,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:48,424 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:33:48,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:48,425 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:48,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 374 transitions, 838 flow [2023-08-04 09:33:49,078 INFO L124 PetriNetUnfolderBase]: 967/5251 cut-off events. [2023-08-04 09:33:49,078 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:33:49,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 5251 events. 967/5251 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 44451 event pairs, 22 based on Foata normal form. 0/4528 useless extension candidates. Maximal degree in co-relation 3084. Up to 192 conditions per place. [2023-08-04 09:33:49,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 22932 [2023-08-04 09:33:56,073 INFO L134 LiptonReduction]: Checked pairs total: 60145 [2023-08-04 09:33:56,074 INFO L136 LiptonReduction]: Total number of compositions: 344 [2023-08-04 09:33:56,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:33:56,076 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;@22f0dbbf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:33:56,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:33:56,080 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:33:56,080 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2023-08-04 09:33:56,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 09:33:56,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:56,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:33:56,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:56,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash -425393895, now seen corresponding path program 1 times [2023-08-04 09:33:56,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:56,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235775721] [2023-08-04 09:33:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:56,120 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 09:33:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235775721] [2023-08-04 09:33:56,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235775721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:33:56,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:33:56,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:33:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126289870] [2023-08-04 09:33:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:33:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:33:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:33:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:33:56,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 718 [2023-08-04 09:33:56,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:33:56,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:56,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 718 [2023-08-04 09:33:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:35:47,462 INFO L124 PetriNetUnfolderBase]: 1247279/1515951 cut-off events. [2023-08-04 09:35:47,462 INFO L125 PetriNetUnfolderBase]: For 118881/118881 co-relation queries the response was YES. [2023-08-04 09:35:53,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028674 conditions, 1515951 events. 1247279/1515951 cut-off events. For 118881/118881 co-relation queries the response was YES. Maximal size of possible extension queue 29748. Compared 8918663 event pairs, 634842 based on Foata normal form. 0/977373 useless extension candidates. Maximal degree in co-relation 1093332. Up to 1449080 conditions per place. [2023-08-04 09:36:03,083 INFO L140 encePairwiseOnDemand]: 713/718 looper letters, 74 selfloop transitions, 2 changer transitions 3/97 dead transitions. [2023-08-04 09:36:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 436 flow [2023-08-04 09:36:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1033 transitions. [2023-08-04 09:36:03,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4795728876508821 [2023-08-04 09:36:03,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1033 transitions. [2023-08-04 09:36:03,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1033 transitions. [2023-08-04 09:36:03,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:03,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1033 transitions. [2023-08-04 09:36:03,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:03,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 718.0) internal successors, (2872), 4 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:03,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 718.0) internal successors, (2872), 4 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:03,108 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 278 flow. Second operand 3 states and 1033 transitions. [2023-08-04 09:36:03,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 436 flow [2023-08-04 09:36:03,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:03,332 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 268 flow [2023-08-04 09:36:03,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=718, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2023-08-04 09:36:03,334 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 09:36:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 268 flow [2023-08-04 09:36:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:03,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:03,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:36:03,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:03,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:03,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1074194899, now seen corresponding path program 1 times [2023-08-04 09:36:03,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:03,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195041217] [2023-08-04 09:36:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:36:03,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:03,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195041217] [2023-08-04 09:36:03,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195041217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:03,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944669358] [2023-08-04 09:36:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:03,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:03,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:36:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:36:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:03,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:03,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:36:03,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944669358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:03,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:03,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32722736] [2023-08-04 09:36:03,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:03,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 718 [2023-08-04 09:36:03,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:03,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 718 [2023-08-04 09:36:03,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand