/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-sorted.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:31:14,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:31:14,074 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:31:14,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:31:14,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:31:14,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:31:14,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:31:14,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:31:14,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:31:14,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:31:14,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:31:14,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:31:14,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:31:14,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:31:14,125 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:31:14,125 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:31:14,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:31:14,126 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:31:14,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:31:14,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:31:14,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:31:14,126 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:31:14,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:31:14,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:31:14,127 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:31:14,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:31:14,128 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:31:14,129 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:31:14,129 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:31:14,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:31:14,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:31:14,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:31:14,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:31:14,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:31:14,132 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:31:14,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:31:14,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:31:14,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:31:14,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:31:14,394 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:31:14,394 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:31:14,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sorted.wvr_bound2.c [2023-08-04 09:31:15,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:31:15,782 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:31:15,783 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-sorted.wvr_bound2.c [2023-08-04 09:31:15,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92b2cb1a/afd99af19b9c445db3b9d3468046be31/FLAG5ea4c3915 [2023-08-04 09:31:15,801 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92b2cb1a/afd99af19b9c445db3b9d3468046be31 [2023-08-04 09:31:15,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:31:15,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:31:15,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:31:15,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:31:15,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:31:15,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:31:15" (1/1) ... [2023-08-04 09:31:15,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea57b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:15, skipping insertion in model container [2023-08-04 09:31:15,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:31:15" (1/1) ... [2023-08-04 09:31:15,837 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:31:15,973 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-sorted.wvr_bound2.c[2677,2690] [2023-08-04 09:31:15,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:31:15,996 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:31:16,018 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-sorted.wvr_bound2.c[2677,2690] [2023-08-04 09:31:16,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:31:16,033 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:31:16,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16 WrapperNode [2023-08-04 09:31:16,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:31:16,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:31:16,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:31:16,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:31:16,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,048 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,070 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 156 [2023-08-04 09:31:16,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:31:16,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:31:16,071 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:31:16,071 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:31:16,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,097 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:31:16,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:31:16,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:31:16,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:31:16,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (1/1) ... [2023-08-04 09:31:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:31:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:16,142 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 09:31:16,157 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 09:31:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:31:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:31:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:31:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:31:16,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:31:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:31:16,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:31:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:31:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:31:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:31:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:31:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:31:16,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:31:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:31:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:31:16,188 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 09:31:16,309 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:31:16,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:31:16,604 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:31:16,620 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:31:16,620 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:31:16,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:31:16 BoogieIcfgContainer [2023-08-04 09:31:16,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:31:16,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:31:16,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:31:16,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:31:16,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:31:15" (1/3) ... [2023-08-04 09:31:16,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66babef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:31:16, skipping insertion in model container [2023-08-04 09:31:16,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:31:16" (2/3) ... [2023-08-04 09:31:16,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66babef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:31:16, skipping insertion in model container [2023-08-04 09:31:16,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:31:16" (3/3) ... [2023-08-04 09:31:16,630 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-sorted.wvr_bound2.c [2023-08-04 09:31:16,647 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:31:16,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:31:16,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:31:16,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:31:16,776 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:31:16,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:16,990 INFO L124 PetriNetUnfolderBase]: 108/727 cut-off events. [2023-08-04 09:31:16,990 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:17,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 727 events. 108/727 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 404. Up to 16 conditions per place. [2023-08-04 09:31:17,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:17,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:17,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:31:17,028 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:17,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:17,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:17,118 INFO L124 PetriNetUnfolderBase]: 108/727 cut-off events. [2023-08-04 09:31:17,118 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:17,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 727 events. 108/727 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 404. Up to 16 conditions per place. [2023-08-04 09:31:17,140 INFO L119 LiptonReduction]: Number of co-enabled transitions 10944 [2023-08-04 09:31:22,722 INFO L134 LiptonReduction]: Checked pairs total: 20409 [2023-08-04 09:31:22,722 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-04 09:31:22,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:31:22,741 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;@7833502b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:22,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:31:22,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:22,747 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-08-04 09:31:22,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:31:22,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:22,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:22,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:22,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1483529189, now seen corresponding path program 1 times [2023-08-04 09:31:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:22,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228400328] [2023-08-04 09:31:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:23,007 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 09:31:23,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:23,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228400328] [2023-08-04 09:31:23,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228400328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:23,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:31:23,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:31:23,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300561613] [2023-08-04 09:31:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:23,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:31:23,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:23,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:23,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:23,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:23,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:23,918 INFO L124 PetriNetUnfolderBase]: 7929/10230 cut-off events. [2023-08-04 09:31:23,918 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2023-08-04 09:31:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20555 conditions, 10230 events. 7929/10230 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46452 event pairs, 2780 based on Foata normal form. 0/5409 useless extension candidates. Maximal degree in co-relation 17430. Up to 9893 conditions per place. [2023-08-04 09:31:23,980 INFO L140 encePairwiseOnDemand]: 425/429 looper letters, 49 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2023-08-04 09:31:23,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 270 flow [2023-08-04 09:31:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-04 09:31:24,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48951048951048953 [2023-08-04 09:31:24,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-04 09:31:24,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-04 09:31:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:24,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-04 09:31:24,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:24,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:24,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:24,022 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 158 flow. Second operand 3 states and 630 transitions. [2023-08-04 09:31:24,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 270 flow [2023-08-04 09:31:24,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:31:24,031 INFO L231 Difference]: Finished difference. Result has 51 places, 54 transitions, 152 flow [2023-08-04 09:31:24,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2023-08-04 09:31:24,036 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 09:31:24,036 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 152 flow [2023-08-04 09:31:24,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:24,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:24,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:24,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:31:24,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:24,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash -224785125, now seen corresponding path program 1 times [2023-08-04 09:31:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841942449] [2023-08-04 09:31:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:24,140 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 09:31:24,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841942449] [2023-08-04 09:31:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841942449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969154024] [2023-08-04 09:31:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:24,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:24,149 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 09:31:24,157 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 09:31:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:24,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:24,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:24,249 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 09:31:24,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:24,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969154024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:24,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:24,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685754316] [2023-08-04 09:31:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:24,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:24,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:24,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:24,927 INFO L124 PetriNetUnfolderBase]: 7671/9825 cut-off events. [2023-08-04 09:31:24,928 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-04 09:31:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19750 conditions, 9825 events. 7671/9825 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 43902 event pairs, 2544 based on Foata normal form. 0/5164 useless extension candidates. Maximal degree in co-relation 16628. Up to 9496 conditions per place. [2023-08-04 09:31:24,998 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 54 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 09:31:24,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 286 flow [2023-08-04 09:31:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2023-08-04 09:31:25,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926184926184926 [2023-08-04 09:31:25,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2023-08-04 09:31:25,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2023-08-04 09:31:25,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:25,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2023-08-04 09:31:25,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:25,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:25,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:25,007 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 152 flow. Second operand 3 states and 634 transitions. [2023-08-04 09:31:25,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 286 flow [2023-08-04 09:31:25,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 270 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:31:25,011 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 144 flow [2023-08-04 09:31:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2023-08-04 09:31:25,012 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2023-08-04 09:31:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 144 flow [2023-08-04 09:31:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:25,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:25,018 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 09:31:25,213 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 09:31:25,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:25,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1810538046, now seen corresponding path program 1 times [2023-08-04 09:31:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:25,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70342523] [2023-08-04 09:31:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:25,289 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 09:31:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:25,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70342523] [2023-08-04 09:31:25,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70342523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494049778] [2023-08-04 09:31:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:25,292 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 09:31:25,295 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 09:31:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:25,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:25,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:25,383 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 09:31:25,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494049778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:25,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586387495] [2023-08-04 09:31:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:25,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:25,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:25,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:25,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:25,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:25,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:26,062 INFO L124 PetriNetUnfolderBase]: 7651/9815 cut-off events. [2023-08-04 09:31:26,063 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-04 09:31:26,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19748 conditions, 9815 events. 7651/9815 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42945 event pairs, 3262 based on Foata normal form. 0/5223 useless extension candidates. Maximal degree in co-relation 10181. Up to 8988 conditions per place. [2023-08-04 09:31:26,103 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 59 selfloop transitions, 2 changer transitions 1/69 dead transitions. [2023-08-04 09:31:26,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 298 flow [2023-08-04 09:31:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-04 09:31:26,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2023-08-04 09:31:26,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-04 09:31:26,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-04 09:31:26,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:26,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-04 09:31:26,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,114 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 144 flow. Second operand 3 states and 639 transitions. [2023-08-04 09:31:26,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 298 flow [2023-08-04 09:31:26,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:31:26,118 INFO L231 Difference]: Finished difference. Result has 47 places, 54 transitions, 148 flow [2023-08-04 09:31:26,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=47, PETRI_TRANSITIONS=54} [2023-08-04 09:31:26,119 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-04 09:31:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 54 transitions, 148 flow [2023-08-04 09:31:26,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:26,120 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 09:31:26,128 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 09:31:26,326 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 09:31:26,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:26,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1787561215, now seen corresponding path program 1 times [2023-08-04 09:31:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581910749] [2023-08-04 09:31:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:26,381 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 09:31:26,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581910749] [2023-08-04 09:31:26,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581910749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108302895] [2023-08-04 09:31:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:26,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:26,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:26,384 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 09:31:26,393 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 09:31:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:26,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:26,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:26,489 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 09:31:26,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:26,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108302895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:26,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:26,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055798344] [2023-08-04 09:31:26,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:26,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:26,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:26,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:26,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:26,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:26,917 INFO L124 PetriNetUnfolderBase]: 4618/6022 cut-off events. [2023-08-04 09:31:26,917 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-04 09:31:26,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12423 conditions, 6022 events. 4618/6022 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25301 event pairs, 1542 based on Foata normal form. 0/3334 useless extension candidates. Maximal degree in co-relation 6105. Up to 4418 conditions per place. [2023-08-04 09:31:26,956 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 64 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:31:26,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 324 flow [2023-08-04 09:31:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-08-04 09:31:26,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4996114996114996 [2023-08-04 09:31:26,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-08-04 09:31:26,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-08-04 09:31:26,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:26,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-08-04 09:31:26,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:26,970 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 148 flow. Second operand 3 states and 643 transitions. [2023-08-04 09:31:26,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 324 flow [2023-08-04 09:31:26,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 73 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:31:27,013 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 156 flow [2023-08-04 09:31:27,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-08-04 09:31:27,014 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-04 09:31:27,014 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 156 flow [2023-08-04 09:31:27,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:27,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:27,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:31:27,215 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 09:31:27,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:27,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash 817964584, now seen corresponding path program 1 times [2023-08-04 09:31:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:27,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942241109] [2023-08-04 09:31:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:27,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:27,299 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 09:31:27,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:27,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942241109] [2023-08-04 09:31:27,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942241109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:27,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204698650] [2023-08-04 09:31:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:27,301 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 09:31:27,312 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 09:31:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:27,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:27,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:27,394 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 09:31:27,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:27,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204698650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:27,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:27,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:27,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245811211] [2023-08-04 09:31:27,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:27,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:27,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:27,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:27,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:27,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:27,751 INFO L124 PetriNetUnfolderBase]: 3959/5172 cut-off events. [2023-08-04 09:31:27,751 INFO L125 PetriNetUnfolderBase]: For 416/416 co-relation queries the response was YES. [2023-08-04 09:31:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10937 conditions, 5172 events. 3959/5172 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20997 event pairs, 1597 based on Foata normal form. 0/3018 useless extension candidates. Maximal degree in co-relation 5495. Up to 4362 conditions per place. [2023-08-04 09:31:27,775 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 65 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 09:31:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 334 flow [2023-08-04 09:31:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2023-08-04 09:31:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4996114996114996 [2023-08-04 09:31:27,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2023-08-04 09:31:27,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2023-08-04 09:31:27,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2023-08-04 09:31:27,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,783 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 156 flow. Second operand 3 states and 643 transitions. [2023-08-04 09:31:27,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 334 flow [2023-08-04 09:31:27,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:27,788 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 166 flow [2023-08-04 09:31:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-04 09:31:27,789 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-04 09:31:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 166 flow [2023-08-04 09:31:27,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:27,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:27,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:27,796 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 09:31:27,996 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 09:31:27,996 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:27,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:27,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2143893837, now seen corresponding path program 1 times [2023-08-04 09:31:27,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:27,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030579366] [2023-08-04 09:31:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:27,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:28,083 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 09:31:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030579366] [2023-08-04 09:31:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030579366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642704380] [2023-08-04 09:31:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:28,085 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 09:31:28,086 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 09:31:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:28,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:28,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:28,181 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 09:31:28,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642704380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:28,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:28,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:31:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127004478] [2023-08-04 09:31:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 429 [2023-08-04 09:31:28,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:28,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:28,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 429 [2023-08-04 09:31:28,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:28,592 INFO L124 PetriNetUnfolderBase]: 3935/5136 cut-off events. [2023-08-04 09:31:28,593 INFO L125 PetriNetUnfolderBase]: For 332/332 co-relation queries the response was YES. [2023-08-04 09:31:28,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10927 conditions, 5136 events. 3935/5136 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20809 event pairs, 1802 based on Foata normal form. 0/3023 useless extension candidates. Maximal degree in co-relation 8956. Up to 4935 conditions per place. [2023-08-04 09:31:28,622 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 59 selfloop transitions, 2 changer transitions 3/71 dead transitions. [2023-08-04 09:31:28,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 324 flow [2023-08-04 09:31:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-04 09:31:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2023-08-04 09:31:28,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-04 09:31:28,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-04 09:31:28,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:28,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-04 09:31:28,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:28,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:28,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 429.0) internal successors, (1716), 4 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:28,632 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 166 flow. Second operand 3 states and 639 transitions. [2023-08-04 09:31:28,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 324 flow [2023-08-04 09:31:28,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:28,643 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 164 flow [2023-08-04 09:31:28,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-08-04 09:31:28,645 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 09:31:28,646 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 164 flow [2023-08-04 09:31:28,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:28,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:28,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:28,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:31:28,853 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 09:31:28,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:28,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1214603126, now seen corresponding path program 1 times [2023-08-04 09:31:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859436032] [2023-08-04 09:31:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:28,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:28,928 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 09:31:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859436032] [2023-08-04 09:31:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859436032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246253087] [2023-08-04 09:31:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:28,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:28,931 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 09:31:28,940 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 09:31:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:29,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:31:29,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:29,063 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 09:31:29,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:29,096 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 09:31:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246253087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:29,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:29,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:31:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417828327] [2023-08-04 09:31:29,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:29,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:29,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 429 [2023-08-04 09:31:29,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:29,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:29,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 429 [2023-08-04 09:31:29,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:29,141 INFO L124 PetriNetUnfolderBase]: 16/34 cut-off events. [2023-08-04 09:31:29,141 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 09:31:29,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 34 events. 16/34 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 62 event pairs, 3 based on Foata normal form. 4/28 useless extension candidates. Maximal degree in co-relation 68. Up to 21 conditions per place. [2023-08-04 09:31:29,142 INFO L140 encePairwiseOnDemand]: 426/429 looper letters, 0 selfloop transitions, 0 changer transitions 17/17 dead transitions. [2023-08-04 09:31:29,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 68 flow [2023-08-04 09:31:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:31:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:31:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 780 transitions. [2023-08-04 09:31:29,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-04 09:31:29,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 780 transitions. [2023-08-04 09:31:29,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 780 transitions. [2023-08-04 09:31:29,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:29,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 780 transitions. [2023-08-04 09:31:29,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:29,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 429.0) internal successors, (2145), 5 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:29,150 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 429.0) internal successors, (2145), 5 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:29,151 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 164 flow. Second operand 4 states and 780 transitions. [2023-08-04 09:31:29,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 68 flow [2023-08-04 09:31:29,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:29,151 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:31:29,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=429, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:31:29,152 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -27 predicate places. [2023-08-04 09:31:29,152 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:31:29,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.8) internal successors, (989), 5 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:29,155 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:31:29,168 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 09:31:29,363 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 09:31:29,364 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:29,365 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:31:29,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,425 INFO L124 PetriNetUnfolderBase]: 108/727 cut-off events. [2023-08-04 09:31:29,425 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:29,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 727 events. 108/727 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 404. Up to 16 conditions per place. [2023-08-04 09:31:29,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:31:29,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 223 transitions, 488 flow [2023-08-04 09:31:29,483 INFO L124 PetriNetUnfolderBase]: 108/727 cut-off events. [2023-08-04 09:31:29,483 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:29,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 727 events. 108/727 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 0 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 404. Up to 16 conditions per place. [2023-08-04 09:31:29,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 10944 [2023-08-04 09:31:34,220 INFO L134 LiptonReduction]: Checked pairs total: 20285 [2023-08-04 09:31:34,220 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-04 09:31:34,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:31:34,223 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;@7833502b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:34,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:31:34,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:34,226 INFO L124 PetriNetUnfolderBase]: 5/37 cut-off events. [2023-08-04 09:31:34,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:31:34,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:34,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:31:34,227 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 09:31:34,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -685067281, now seen corresponding path program 1 times [2023-08-04 09:31:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:34,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839354894] [2023-08-04 09:31:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:34,381 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 09:31:34,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839354894] [2023-08-04 09:31:34,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839354894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:34,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:31:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:31:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454451908] [2023-08-04 09:31:34,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:31:34,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 425 [2023-08-04 09:31:34,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:34,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:34,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 425 [2023-08-04 09:31:34,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:35,006 INFO L124 PetriNetUnfolderBase]: 8228/10673 cut-off events. [2023-08-04 09:31:35,006 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-08-04 09:31:35,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21445 conditions, 10673 events. 8228/10673 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49738 event pairs, 3698 based on Foata normal form. 0/5665 useless extension candidates. Maximal degree in co-relation 17443. Up to 10314 conditions per place. [2023-08-04 09:31:35,030 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 27 selfloop transitions, 2 changer transitions 22/58 dead transitions. [2023-08-04 09:31:35,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 254 flow [2023-08-04 09:31:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 09:31:35,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49098039215686273 [2023-08-04 09:31:35,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 09:31:35,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 09:31:35,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:35,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 09:31:35,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:35,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:35,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:35,037 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 158 flow. Second operand 3 states and 626 transitions. [2023-08-04 09:31:35,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 254 flow [2023-08-04 09:31:35,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:31:35,039 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 97 flow [2023-08-04 09:31:35,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2023-08-04 09:31:35,041 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 09:31:35,042 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 97 flow [2023-08-04 09:31:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:35,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:35,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:35,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:31:35,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:31:35,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 699494192, now seen corresponding path program 1 times [2023-08-04 09:31:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:35,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640889553] [2023-08-04 09:31:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:31:35,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:31:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:31:35,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:31:35,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:31:35,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:31:35,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:31:35,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:31:35,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:31:35,115 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:31:35,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:31:35,116 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:31:35,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:31:35,157 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:31:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:35,699 INFO L124 PetriNetUnfolderBase]: 917/4387 cut-off events. [2023-08-04 09:31:35,700 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:31:35,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 4387 events. 917/4387 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 35750 event pairs, 11 based on Foata normal form. 0/3714 useless extension candidates. Maximal degree in co-relation 2620. Up to 192 conditions per place. [2023-08-04 09:31:35,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:35,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:35,790 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:31:35,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:35,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:35,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 292 transitions, 674 flow [2023-08-04 09:31:36,304 INFO L124 PetriNetUnfolderBase]: 917/4387 cut-off events. [2023-08-04 09:31:36,304 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:31:36,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 4387 events. 917/4387 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 35750 event pairs, 11 based on Foata normal form. 0/3714 useless extension candidates. Maximal degree in co-relation 2620. Up to 192 conditions per place. [2023-08-04 09:31:36,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 30780 [2023-08-04 09:31:41,631 INFO L134 LiptonReduction]: Checked pairs total: 84598 [2023-08-04 09:31:41,631 INFO L136 LiptonReduction]: Total number of compositions: 241 [2023-08-04 09:31:41,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:31:41,633 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;@7833502b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:41,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:31:41,636 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:41,636 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-04 09:31:41,636 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:31:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:41,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:41,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:41,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1500624414, now seen corresponding path program 1 times [2023-08-04 09:31:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129813989] [2023-08-04 09:31:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:41,676 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 09:31:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129813989] [2023-08-04 09:31:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129813989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:41,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:31:41,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:31:41,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414738439] [2023-08-04 09:31:41,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:41,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:31:41,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 533 [2023-08-04 09:31:41,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:31:41,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:41,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 533 [2023-08-04 09:31:41,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand