/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:24:22,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:24:23,014 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:24:23,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:24:23,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:24:23,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:24:23,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:24:23,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:24:23,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:24:23,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:24:23,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:24:23,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:24:23,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:24:23,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:24:23,044 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:24:23,044 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:24:23,044 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:24:23,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:24:23,046 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:24:23,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:24:23,047 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:24:23,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:24:23,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:24:23,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:24:23,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:24:23,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:24:23,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:24:23,048 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:24:23,048 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:24:23,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:24:23,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:24:23,049 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:24:23,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:24:23,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:24:23,049 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:24:23,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:24:23,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:24:23,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:24:23,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:24:23,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:24:23,226 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:24:23,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i [2023-08-03 21:24:24,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:24:24,306 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:24:24,306 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i [2023-08-03 21:24:24,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ed1a7d7/fafb0510218e4a10bb14ab499544ebb4/FLAG0092b1134 [2023-08-03 21:24:24,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ed1a7d7/fafb0510218e4a10bb14ab499544ebb4 [2023-08-03 21:24:24,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:24:24,680 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:24:24,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:24:24,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:24:24,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:24:24,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:24:24" (1/1) ... [2023-08-03 21:24:24,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e6352f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:24, skipping insertion in model container [2023-08-03 21:24:24,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:24:24" (1/1) ... [2023-08-03 21:24:24,726 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:24:24,923 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i[30176,30189] [2023-08-03 21:24:24,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:24:24,951 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:24:24,976 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:24:24,977 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:24:24,984 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i[30176,30189] [2023-08-03 21:24:25,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:24:25,024 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:24:25,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25 WrapperNode [2023-08-03 21:24:25,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:24:25,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:24:25,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:24:25,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:24:25,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,056 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-03 21:24:25,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:24:25,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:24:25,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:24:25,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:24:25,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,075 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,076 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:24:25,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:24:25,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:24:25,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:24:25,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (1/1) ... [2023-08-03 21:24:25,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:24:25,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:25,114 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) [2023-08-03 21:24:25,121 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 [2023-08-03 21:24:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:24:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:24:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:24:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:24:25,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:24:25,144 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:24:25,144 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:24:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:24:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:24:25,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:24:25,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:24:25,146 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 21:24:25,264 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:24:25,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:24:25,430 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:24:25,437 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:24:25,437 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-03 21:24:25,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:24:25 BoogieIcfgContainer [2023-08-03 21:24:25,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:24:25,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:24:25,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:24:25,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:24:25,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:24:24" (1/3) ... [2023-08-03 21:24:25,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581ae099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:24:25, skipping insertion in model container [2023-08-03 21:24:25,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:25" (2/3) ... [2023-08-03 21:24:25,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581ae099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:24:25, skipping insertion in model container [2023-08-03 21:24:25,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:24:25" (3/3) ... [2023-08-03 21:24:25,446 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i [2023-08-03 21:24:25,451 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:24:25,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:24:25,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:24:25,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:24:25,517 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:24:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,598 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-03 21:24:25,598 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:25,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-03 21:24:25,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:25,621 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-03 21:24:25,641 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-03 21:24:25,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 131 events. 14/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-03 21:24:25,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-08-03 21:24:27,904 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-08-03 21:24:27,904 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-03 21:24:27,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:24:27,930 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;@50b24d67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:27,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:27,934 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:27,934 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-08-03 21:24:27,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:27,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:24:27,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:24:27,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1370191057, now seen corresponding path program 1 times [2023-08-03 21:24:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289731077] [2023-08-03 21:24:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:28,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:24:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:28,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:24:28,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:24:28,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:24:28,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:24:28,059 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:24:28,061 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:24:28,061 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:24:28,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:24:28,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:24:28,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,095 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-03 21:24:28,095 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:24:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-03 21:24:28,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,097 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:28,097 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,097 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:28,114 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-03 21:24:28,114 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:24:28,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-03 21:24:28,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-08-03 21:24:30,212 INFO L134 LiptonReduction]: Checked pairs total: 13795 [2023-08-03 21:24:30,213 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-03 21:24:30,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:24:30,215 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50b24d67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:30,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:30,220 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:30,220 INFO L124 PetriNetUnfolderBase]: 10/49 cut-off events. [2023-08-03 21:24:30,220 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:24:30,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:30,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:24:30,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:24:30,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash -804893670, now seen corresponding path program 1 times [2023-08-03 21:24:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:30,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225117650] [2023-08-03 21:24:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:30,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:30,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225117650] [2023-08-03 21:24:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225117650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:30,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509439731] [2023-08-03 21:24:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:30,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:30,353 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) [2023-08-03 21:24:30,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 21:24:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:30,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:24:30,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:30,466 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:24:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509439731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:24:30,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:24:30,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:24:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301690369] [2023-08-03 21:24:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:30,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:24:30,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 236 [2023-08-03 21:24:30,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:30,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:30,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 236 [2023-08-03 21:24:30,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:30,707 INFO L124 PetriNetUnfolderBase]: 1280/2117 cut-off events. [2023-08-03 21:24:30,707 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-03 21:24:30,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 2117 events. 1280/2117 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11890 event pairs, 80 based on Foata normal form. 322/2325 useless extension candidates. Maximal degree in co-relation 3048. Up to 1877 conditions per place. [2023-08-03 21:24:30,712 INFO L140 encePairwiseOnDemand]: 218/236 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-03 21:24:30,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 252 flow [2023-08-03 21:24:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:24:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:24:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2023-08-03 21:24:30,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389830508474577 [2023-08-03 21:24:30,723 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 636 transitions. [2023-08-03 21:24:30,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 636 transitions. [2023-08-03 21:24:30,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:30,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 636 transitions. [2023-08-03 21:24:30,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:30,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:30,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:30,734 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 5 states and 636 transitions. [2023-08-03 21:24:30,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 252 flow [2023-08-03 21:24:30,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:24:30,737 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-03 21:24:30,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-03 21:24:30,740 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-03 21:24:30,740 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-03 21:24:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:30,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:24:30,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:30,944 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 [2023-08-03 21:24:30,945 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:24:30,945 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:24:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,958 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-03 21:24:30,958 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:24:30,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-03 21:24:30,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:30,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-03 21:24:30,970 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-03 21:24:30,970 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:24:30,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 200 events. 24/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 548 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 132. Up to 6 conditions per place. [2023-08-03 21:24:30,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-08-03 21:24:32,975 INFO L134 LiptonReduction]: Checked pairs total: 13795 [2023-08-03 21:24:32,975 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-03 21:24:32,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:24:32,977 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;@50b24d67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:32,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:32,979 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:32,979 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-03 21:24:32,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:24:32,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:32,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 23440847, now seen corresponding path program 1 times [2023-08-03 21:24:32,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:32,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769792948] [2023-08-03 21:24:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:33,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:33,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769792948] [2023-08-03 21:24:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769792948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:24:33,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:24:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:24:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905393226] [2023-08-03 21:24:33,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:33,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:24:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:24:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:24:33,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 236 [2023-08-03 21:24:33,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:33,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 236 [2023-08-03 21:24:33,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:33,217 INFO L124 PetriNetUnfolderBase]: 1441/2556 cut-off events. [2023-08-03 21:24:33,217 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 21:24:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 2556 events. 1441/2556 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 14565 event pairs, 640 based on Foata normal form. 360/2676 useless extension candidates. Maximal degree in co-relation 472. Up to 2332 conditions per place. [2023-08-03 21:24:33,224 INFO L140 encePairwiseOnDemand]: 219/236 looper letters, 34 selfloop transitions, 2 changer transitions 4/46 dead transitions. [2023-08-03 21:24:33,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-08-03 21:24:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:24:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:24:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-03 21:24:33,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2023-08-03 21:24:33,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-03 21:24:33,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-03 21:24:33,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:33,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-03 21:24:33,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,228 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 390 transitions. [2023-08-03 21:24:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-08-03 21:24:33,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 21:24:33,230 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 82 flow [2023-08-03 21:24:33,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-03 21:24:33,230 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-03 21:24:33,230 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 82 flow [2023-08-03 21:24:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:33,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:33,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:24:33,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:33,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:33,231 INFO L85 PathProgramCache]: Analyzing trace with hash -676187142, now seen corresponding path program 1 times [2023-08-03 21:24:33,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:33,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722597992] [2023-08-03 21:24:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:33,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:33,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722597992] [2023-08-03 21:24:33,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722597992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:33,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812466236] [2023-08-03 21:24:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:33,356 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) [2023-08-03 21:24:33,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:24:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:33,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:24:33,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:33,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812466236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:33,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:24:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452982472] [2023-08-03 21:24:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:33,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:33,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:24:33,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 236 [2023-08-03 21:24:33,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:33,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 236 [2023-08-03 21:24:33,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:33,610 INFO L124 PetriNetUnfolderBase]: 904/1549 cut-off events. [2023-08-03 21:24:33,610 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-03 21:24:33,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3264 conditions, 1549 events. 904/1549 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8013 event pairs, 80 based on Foata normal form. 10/1559 useless extension candidates. Maximal degree in co-relation 332. Up to 1005 conditions per place. [2023-08-03 21:24:33,615 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 50 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-03 21:24:33,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 246 flow [2023-08-03 21:24:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-03 21:24:33,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201271186440678 [2023-08-03 21:24:33,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-03 21:24:33,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-03 21:24:33,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:33,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-03 21:24:33,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,626 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,626 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 82 flow. Second operand 4 states and 491 transitions. [2023-08-03 21:24:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 246 flow [2023-08-03 21:24:33,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:24:33,628 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-03 21:24:33,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-03 21:24:33,629 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-03 21:24:33,630 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-03 21:24:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:33,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:33,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:33,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 21:24:33,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:33,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash 207521092, now seen corresponding path program 1 times [2023-08-03 21:24:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761731216] [2023-08-03 21:24:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:34,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:34,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761731216] [2023-08-03 21:24:34,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761731216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:34,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793732476] [2023-08-03 21:24:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:34,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:34,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:34,023 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) [2023-08-03 21:24:34,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:24:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:34,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-03 21:24:34,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:34,110 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:34,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:34,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:34,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:34,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:34,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793732476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:34,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:34,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 21:24:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124346364] [2023-08-03 21:24:34,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:34,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 21:24:34,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 21:24:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=44, Unknown=4, NotChecked=0, Total=72 [2023-08-03 21:24:34,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 236 [2023-08-03 21:24:34,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 86.77777777777777) internal successors, (781), 9 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:34,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 236 [2023-08-03 21:24:34,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:34,493 INFO L124 PetriNetUnfolderBase]: 804/1387 cut-off events. [2023-08-03 21:24:34,493 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2023-08-03 21:24:34,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3284 conditions, 1387 events. 804/1387 cut-off events. For 988/988 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6628 event pairs, 422 based on Foata normal form. 12/1398 useless extension candidates. Maximal degree in co-relation 2478. Up to 1203 conditions per place. [2023-08-03 21:24:34,498 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 41 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2023-08-03 21:24:34,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 250 flow [2023-08-03 21:24:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2023-08-03 21:24:34,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046610169491525 [2023-08-03 21:24:34,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2023-08-03 21:24:34,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2023-08-03 21:24:34,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:34,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2023-08-03 21:24:34,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,502 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 4 states and 382 transitions. [2023-08-03 21:24:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 250 flow [2023-08-03 21:24:34,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 238 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:24:34,504 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 128 flow [2023-08-03 21:24:34,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-03 21:24:34,504 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-03 21:24:34,504 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 128 flow [2023-08-03 21:24:34,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 86.77777777777777) internal successors, (781), 9 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:34,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:34,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:34,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:34,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:34,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -323171442, now seen corresponding path program 1 times [2023-08-03 21:24:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:34,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199028474] [2023-08-03 21:24:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:34,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199028474] [2023-08-03 21:24:34,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199028474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:34,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497283140] [2023-08-03 21:24:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:34,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:34,774 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) [2023-08-03 21:24:34,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 21:24:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:34,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 21:24:34,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:34,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 21:24:34,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:24:34,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:34,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:24:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497283140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:24:34,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:24:34,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-03 21:24:34,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945734346] [2023-08-03 21:24:34,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:34,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:34,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 21:24:34,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 236 [2023-08-03 21:24:34,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:34,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:34,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 236 [2023-08-03 21:24:34,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:35,096 INFO L124 PetriNetUnfolderBase]: 338/685 cut-off events. [2023-08-03 21:24:35,096 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2023-08-03 21:24:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 685 events. 338/685 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3139 event pairs, 108 based on Foata normal form. 157/842 useless extension candidates. Maximal degree in co-relation 1507. Up to 459 conditions per place. [2023-08-03 21:24:35,098 INFO L140 encePairwiseOnDemand]: 226/236 looper letters, 33 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2023-08-03 21:24:35,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 261 flow [2023-08-03 21:24:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-03 21:24:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461864406779661 [2023-08-03 21:24:35,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-03 21:24:35,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-03 21:24:35,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:35,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-03 21:24:35,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,102 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 128 flow. Second operand 4 states and 436 transitions. [2023-08-03 21:24:35,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 261 flow [2023-08-03 21:24:35,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 261 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:24:35,105 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 148 flow [2023-08-03 21:24:35,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-03 21:24:35,106 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-03 21:24:35,106 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 148 flow [2023-08-03 21:24:35,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:35,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:35,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 21:24:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:35,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:35,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -752092841, now seen corresponding path program 1 times [2023-08-03 21:24:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184063226] [2023-08-03 21:24:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:35,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184063226] [2023-08-03 21:24:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184063226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:35,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392236329] [2023-08-03 21:24:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:35,378 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) [2023-08-03 21:24:35,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 21:24:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:35,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 21:24:35,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:35,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 21:24:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:24:35,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:35,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:35,510 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_140 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_140) |c_~#mutex~0.base|) |c_~#mutex~0.offset|) 0))) is different from false [2023-08-03 21:24:35,529 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:24:35,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-03 21:24:35,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-03 21:24:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-03 21:24:35,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392236329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:35,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:35,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-03 21:24:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189565719] [2023-08-03 21:24:35,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:35,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 21:24:35,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 21:24:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=45, Unknown=1, NotChecked=14, Total=90 [2023-08-03 21:24:35,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 236 [2023-08-03 21:24:35,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 148 flow. Second operand has 10 states, 10 states have (on average 89.2) internal successors, (892), 10 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:35,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 236 [2023-08-03 21:24:35,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:35,625 INFO L124 PetriNetUnfolderBase]: 69/209 cut-off events. [2023-08-03 21:24:35,625 INFO L125 PetriNetUnfolderBase]: For 416/416 co-relation queries the response was YES. [2023-08-03 21:24:35,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 209 events. 69/209 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 754 event pairs, 6 based on Foata normal form. 78/287 useless extension candidates. Maximal degree in co-relation 575. Up to 167 conditions per place. [2023-08-03 21:24:35,626 INFO L140 encePairwiseOnDemand]: 230/236 looper letters, 28 selfloop transitions, 6 changer transitions 1/39 dead transitions. [2023-08-03 21:24:35,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 39 transitions, 229 flow [2023-08-03 21:24:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-08-03 21:24:35,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399364406779661 [2023-08-03 21:24:35,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-08-03 21:24:35,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-08-03 21:24:35,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:35,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-08-03 21:24:35,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,629 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,629 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 148 flow. Second operand 4 states and 377 transitions. [2023-08-03 21:24:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 39 transitions, 229 flow [2023-08-03 21:24:35,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 209 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 21:24:35,632 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 120 flow [2023-08-03 21:24:35,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-03 21:24:35,633 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-03 21:24:35,633 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 120 flow [2023-08-03 21:24:35,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 89.2) internal successors, (892), 10 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:35,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:35,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:35,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:35,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:35,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:35,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1263842934, now seen corresponding path program 1 times [2023-08-03 21:24:35,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:35,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996968812] [2023-08-03 21:24:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996968812] [2023-08-03 21:24:36,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996968812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:36,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044226543] [2023-08-03 21:24:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:36,081 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) [2023-08-03 21:24:36,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 21:24:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:36,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-03 21:24:36,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:36,158 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:36,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:36,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:36,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:36,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:36,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:36,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044226543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:36,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-03 21:24:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885614659] [2023-08-03 21:24:36,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 21:24:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 21:24:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=161, Unknown=6, NotChecked=0, Total=210 [2023-08-03 21:24:36,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 236 [2023-08-03 21:24:36,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 120 flow. Second operand has 15 states, 15 states have (on average 82.86666666666666) internal successors, (1243), 15 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:36,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:36,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 236 [2023-08-03 21:24:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:36,758 INFO L124 PetriNetUnfolderBase]: 90/281 cut-off events. [2023-08-03 21:24:36,759 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-08-03 21:24:36,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 281 events. 90/281 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1241 event pairs, 18 based on Foata normal form. 2/282 useless extension candidates. Maximal degree in co-relation 754. Up to 123 conditions per place. [2023-08-03 21:24:36,760 INFO L140 encePairwiseOnDemand]: 227/236 looper letters, 61 selfloop transitions, 12 changer transitions 4/82 dead transitions. [2023-08-03 21:24:36,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 475 flow [2023-08-03 21:24:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 21:24:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 21:24:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 954 transitions. [2023-08-03 21:24:36,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674884437596302 [2023-08-03 21:24:36,762 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 954 transitions. [2023-08-03 21:24:36,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 954 transitions. [2023-08-03 21:24:36,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:36,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 954 transitions. [2023-08-03 21:24:36,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.72727272727273) internal successors, (954), 11 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:36,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:36,766 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 236.0) internal successors, (2832), 12 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:36,766 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 120 flow. Second operand 11 states and 954 transitions. [2023-08-03 21:24:36,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 475 flow [2023-08-03 21:24:36,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 459 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 21:24:36,768 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-08-03 21:24:36,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=199, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-03 21:24:36,769 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-08-03 21:24:36,769 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-08-03 21:24:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.86666666666666) internal successors, (1243), 15 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:36,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:36,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:36,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:36,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:36,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1237430158, now seen corresponding path program 1 times [2023-08-03 21:24:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:36,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675005619] [2023-08-03 21:24:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675005619] [2023-08-03 21:24:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675005619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:37,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933901435] [2023-08-03 21:24:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:37,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:24:37,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 21:24:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:37,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-03 21:24:37,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:37,269 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:37,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:37,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:37,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:37,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:37,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:37,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:37,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933901435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:37,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:37,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-03 21:24:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341951519] [2023-08-03 21:24:37,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:37,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 21:24:37,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 21:24:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=162, Unknown=6, NotChecked=0, Total=210 [2023-08-03 21:24:37,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 236 [2023-08-03 21:24:37,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 199 flow. Second operand has 15 states, 15 states have (on average 82.86666666666666) internal successors, (1243), 15 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:37,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:37,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 236 [2023-08-03 21:24:37,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:37,969 INFO L124 PetriNetUnfolderBase]: 90/277 cut-off events. [2023-08-03 21:24:37,970 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-08-03 21:24:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 277 events. 90/277 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1212 event pairs, 35 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 804. Up to 188 conditions per place. [2023-08-03 21:24:37,971 INFO L140 encePairwiseOnDemand]: 227/236 looper letters, 48 selfloop transitions, 8 changer transitions 2/63 dead transitions. [2023-08-03 21:24:37,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 393 flow [2023-08-03 21:24:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 21:24:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 21:24:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 769 transitions. [2023-08-03 21:24:37,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620527306967985 [2023-08-03 21:24:37,973 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 769 transitions. [2023-08-03 21:24:37,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 769 transitions. [2023-08-03 21:24:37,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:37,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 769 transitions. [2023-08-03 21:24:37,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.44444444444444) internal successors, (769), 9 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:37,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 236.0) internal successors, (2360), 10 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:37,976 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 236.0) internal successors, (2360), 10 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:37,976 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 9 states and 769 transitions. [2023-08-03 21:24:37,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 393 flow [2023-08-03 21:24:37,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-03 21:24:37,978 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-03 21:24:37,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-08-03 21:24:37,979 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2023-08-03 21:24:37,979 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-03 21:24:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.86666666666666) internal successors, (1243), 15 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:37,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:37,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:38,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:38,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2137268358, now seen corresponding path program 2 times [2023-08-03 21:24:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:38,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826154844] [2023-08-03 21:24:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:38,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:38,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:38,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826154844] [2023-08-03 21:24:38,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826154844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:38,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696445038] [2023-08-03 21:24:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:24:38,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:38,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:24:38,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 21:24:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:24:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:24:38,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-03 21:24:38,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:39,004 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:39,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:39,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:39,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:39,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:39,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:39,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696445038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:39,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:39,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-03 21:24:39,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257105323] [2023-08-03 21:24:39,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 21:24:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 21:24:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-03 21:24:39,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 236 [2023-08-03 21:24:39,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 235 flow. Second operand has 16 states, 16 states have (on average 101.375) internal successors, (1622), 16 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:39,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:39,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 236 [2023-08-03 21:24:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:39,840 INFO L124 PetriNetUnfolderBase]: 86/272 cut-off events. [2023-08-03 21:24:39,840 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-08-03 21:24:39,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 272 events. 86/272 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1169 event pairs, 35 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 819. Up to 97 conditions per place. [2023-08-03 21:24:39,842 INFO L140 encePairwiseOnDemand]: 228/236 looper letters, 46 selfloop transitions, 12 changer transitions 2/67 dead transitions. [2023-08-03 21:24:39,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 448 flow [2023-08-03 21:24:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 21:24:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 21:24:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 740 transitions. [2023-08-03 21:24:39,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44794188861985473 [2023-08-03 21:24:39,843 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 740 transitions. [2023-08-03 21:24:39,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 740 transitions. [2023-08-03 21:24:39,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:39,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 740 transitions. [2023-08-03 21:24:39,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.71428571428571) internal successors, (740), 7 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:39,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 236.0) internal successors, (1888), 8 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:39,846 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 236.0) internal successors, (1888), 8 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:39,847 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 7 states and 740 transitions. [2023-08-03 21:24:39,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 448 flow [2023-08-03 21:24:39,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:24:39,849 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 285 flow [2023-08-03 21:24:39,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2023-08-03 21:24:39,849 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2023-08-03 21:24:39,849 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 285 flow [2023-08-03 21:24:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 101.375) internal successors, (1622), 16 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:39,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:39,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:39,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 21:24:40,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:40,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1668939370, now seen corresponding path program 1 times [2023-08-03 21:24:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738822352] [2023-08-03 21:24:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738822352] [2023-08-03 21:24:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738822352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969156439] [2023-08-03 21:24:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:40,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:24:40,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 21:24:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:40,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 21:24:40,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:40,462 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:40,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:40,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:40,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:40,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:40,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:40,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:40,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:40,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:40,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_400) c_~p~0.base) c_~p~0.offset) 0)) is different from false [2023-08-03 21:24:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-03 21:24:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969156439] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:40,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:40,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-03 21:24:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400647005] [2023-08-03 21:24:40,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:40,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 21:24:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 21:24:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-08-03 21:24:40,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 236 [2023-08-03 21:24:40,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 285 flow. Second operand has 19 states, 19 states have (on average 79.21052631578948) internal successors, (1505), 19 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:40,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:40,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 236 [2023-08-03 21:24:40,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:41,110 INFO L124 PetriNetUnfolderBase]: 98/311 cut-off events. [2023-08-03 21:24:41,111 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-08-03 21:24:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 311 events. 98/311 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1423 event pairs, 23 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1010. Up to 76 conditions per place. [2023-08-03 21:24:41,113 INFO L140 encePairwiseOnDemand]: 223/236 looper letters, 32 selfloop transitions, 7 changer transitions 62/106 dead transitions. [2023-08-03 21:24:41,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 745 flow [2023-08-03 21:24:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-03 21:24:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-03 21:24:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1613 transitions. [2023-08-03 21:24:41,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34173728813559323 [2023-08-03 21:24:41,119 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1613 transitions. [2023-08-03 21:24:41,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1613 transitions. [2023-08-03 21:24:41,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:41,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1613 transitions. [2023-08-03 21:24:41,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 80.65) internal successors, (1613), 20 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:41,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 236.0) internal successors, (4956), 21 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:41,127 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 236.0) internal successors, (4956), 21 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:41,127 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 285 flow. Second operand 20 states and 1613 transitions. [2023-08-03 21:24:41,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 745 flow [2023-08-03 21:24:41,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 106 transitions, 703 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-03 21:24:41,130 INFO L231 Difference]: Finished difference. Result has 97 places, 36 transitions, 214 flow [2023-08-03 21:24:41,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=214, PETRI_PLACES=97, PETRI_TRANSITIONS=36} [2023-08-03 21:24:41,131 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2023-08-03 21:24:41,131 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 36 transitions, 214 flow [2023-08-03 21:24:41,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 79.21052631578948) internal successors, (1505), 19 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:41,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:41,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:41,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:41,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:41,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash 688289776, now seen corresponding path program 2 times [2023-08-03 21:24:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503655022] [2023-08-03 21:24:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:41,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:41,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503655022] [2023-08-03 21:24:41,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503655022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:41,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060093050] [2023-08-03 21:24:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 21:24:41,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:41,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:24:41,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 21:24:41,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 21:24:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:24:41,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 21:24:41,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:41,731 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:24:41,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:24:41,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:41,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:41,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:24:41,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:41,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:41,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-03 21:24:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:41,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:42,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060093050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:42,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:42,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-03 21:24:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151225220] [2023-08-03 21:24:42,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:42,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 21:24:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 21:24:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-03 21:24:42,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 236 [2023-08-03 21:24:42,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 36 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:42,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:42,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 236 [2023-08-03 21:24:42,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:42,784 INFO L124 PetriNetUnfolderBase]: 58/181 cut-off events. [2023-08-03 21:24:42,785 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2023-08-03 21:24:42,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 181 events. 58/181 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 609 event pairs, 32 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 632. Up to 85 conditions per place. [2023-08-03 21:24:42,785 INFO L140 encePairwiseOnDemand]: 224/236 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-03 21:24:42,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 47 transitions, 358 flow [2023-08-03 21:24:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 21:24:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 21:24:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2023-08-03 21:24:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41779661016949154 [2023-08-03 21:24:42,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2023-08-03 21:24:42,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2023-08-03 21:24:42,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:42,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2023-08-03 21:24:42,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:42,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 236.0) internal successors, (2596), 11 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:42,792 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 236.0) internal successors, (2596), 11 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:42,792 INFO L175 Difference]: Start difference. First operand has 97 places, 36 transitions, 214 flow. Second operand 10 states and 986 transitions. [2023-08-03 21:24:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 47 transitions, 358 flow [2023-08-03 21:24:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 293 flow, removed 14 selfloop flow, removed 24 redundant places. [2023-08-03 21:24:42,793 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-03 21:24:42,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-08-03 21:24:42,794 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-08-03 21:24:42,794 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-03 21:24:42,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.8) internal successors, (1956), 20 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:24:42,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 21:24:42,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 21:24:42,999 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:43,000 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-03 21:24:43,000 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:24:43,000 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:24:43,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:24:43 BasicIcfg [2023-08-03 21:24:43,006 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:24:43,007 INFO L158 Benchmark]: Toolchain (without parser) took 18326.27ms. Allocated memory was 331.4MB in the beginning and 715.1MB in the end (delta: 383.8MB). Free memory was 292.2MB in the beginning and 328.2MB in the end (delta: -36.0MB). Peak memory consumption was 349.6MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 280.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.11ms. Allocated memory is still 331.4MB. Free memory was 292.2MB in the beginning and 272.5MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.84ms. Allocated memory is still 331.4MB. Free memory was 272.5MB in the beginning and 270.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: Boogie Preprocessor took 26.99ms. Allocated memory is still 331.4MB. Free memory was 270.4MB in the beginning and 269.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: RCFGBuilder took 354.90ms. Allocated memory is still 331.4MB. Free memory was 269.1MB in the beginning and 253.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,007 INFO L158 Benchmark]: TraceAbstraction took 17565.20ms. Allocated memory was 331.4MB in the beginning and 715.1MB in the end (delta: 383.8MB). Free memory was 253.1MB in the beginning and 328.2MB in the end (delta: -75.1MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. [2023-08-03 21:24:43,008 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 331.4MB. Free memory is still 280.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 344.11ms. Allocated memory is still 331.4MB. Free memory was 292.2MB in the beginning and 272.5MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.84ms. Allocated memory is still 331.4MB. Free memory was 272.5MB in the beginning and 270.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.99ms. Allocated memory is still 331.4MB. Free memory was 270.4MB in the beginning and 269.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 354.90ms. Allocated memory is still 331.4MB. Free memory was 269.1MB in the beginning and 253.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 17565.20ms. Allocated memory was 331.4MB in the beginning and 715.1MB in the end (delta: 383.8MB). Free memory was 253.1MB in the beginning and 328.2MB in the end (delta: -75.1MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 93 PlacesBefore, 25 PlacesAfterwards, 100 TransitionsBefore, 30 TransitionsAfterwards, 2368 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 2 ChoiceCompositions, 84 TotalNumberOfCompositions, 4764 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2449, independent: 2256, independent conditional: 0, independent unconditional: 2256, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1284, independent: 1243, independent conditional: 0, independent unconditional: 1243, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2449, independent: 1013, independent conditional: 0, independent unconditional: 1013, dependent: 152, dependent conditional: 0, dependent unconditional: 152, unknown: 1284, unknown conditional: 0, unknown unconditional: 1284] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 122 PlacesBefore, 40 PlacesAfterwards, 133 TransitionsBefore, 49 TransitionsAfterwards, 6848 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 2 ChoiceCompositions, 103 TotalNumberOfCompositions, 13795 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5653, independent: 5391, independent conditional: 0, independent unconditional: 5391, dependent: 262, dependent conditional: 0, dependent unconditional: 262, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3306, independent: 3252, independent conditional: 0, independent unconditional: 3252, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5653, independent: 2139, independent conditional: 0, independent unconditional: 2139, dependent: 208, dependent conditional: 0, dependent unconditional: 208, unknown: 3306, unknown conditional: 0, unknown unconditional: 3306] , Statistics on independence cache: Total cache size (in pairs): 117, Positive cache size: 92, Positive conditional cache size: 0, Positive unconditional cache size: 92, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 122 PlacesBefore, 40 PlacesAfterwards, 133 TransitionsBefore, 49 TransitionsAfterwards, 6848 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 2 ChoiceCompositions, 103 TotalNumberOfCompositions, 13795 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6202, independent: 5940, independent conditional: 0, independent unconditional: 5940, dependent: 262, dependent conditional: 0, dependent unconditional: 262, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3404, independent: 3350, independent conditional: 0, independent unconditional: 3350, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6202, independent: 2590, independent conditional: 0, independent unconditional: 2590, dependent: 208, dependent conditional: 0, dependent unconditional: 208, unknown: 3404, unknown conditional: 0, unknown unconditional: 3404] , Statistics on independence cache: Total cache size (in pairs): 176, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 118 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 145 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 67 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 102 IncrementalHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 102 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 145 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.1s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 1843 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1586 mSDsluCounter, 1242 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 170 IncrementalHoareTripleChecker+Unchecked, 1233 mSDsCounter, 147 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6808 IncrementalHoareTripleChecker+Invalid, 7141 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 147 mSolverCounterUnsat, 9 mSDtfsCounter, 6808 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 439 GetRequests, 309 SyntacticMatches, 8 SemanticMatches, 122 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=285occurred in iteration=8, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 388 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 536 ConstructedInterpolants, 25 QuantifiedInterpolants, 5197 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1774 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 27 InterpolantComputations, 2 PerfectInterpolantSequences, 28/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 21:24:43,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...