/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:49:52,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:49:52,548 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:49:52,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:49:52,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:49:52,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:49:52,555 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:49:52,588 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:49:52,589 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:49:52,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:49:52,593 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:49:52,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:49:52,594 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:49:52,595 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:49:52,595 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:49:52,596 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:49:52,596 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:49:52,596 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:49:52,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:49:52,596 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:49:52,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:49:52,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:49:52,597 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:49:52,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:49:52,598 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:49:52,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:49:52,599 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:49:52,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:49:52,600 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:49:52,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:49:52,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:49:52,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:49:52,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:49:52,601 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:49:52,602 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:49:52,603 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 03:49:52,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:49:52,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:49:52,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:49:52,866 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:49:52,866 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:49:52,867 INFO L431 ainManager$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 [2023-08-04 03:49:54,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:49:54,415 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:49:54,415 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i [2023-08-04 03:49:54,426 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8986e03/2729ba4289714e65ae81c41b92aa4220/FLAG49cd559a2 [2023-08-04 03:49:54,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b8986e03/2729ba4289714e65ae81c41b92aa4220 [2023-08-04 03:49:54,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:49:54,442 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:49:54,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:49:54,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:49:54,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:49:54,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118d6fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54, skipping insertion in model container [2023-08-04 03:49:54,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,491 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:49:54,756 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] [2023-08-04 03:49:54,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:49:54,788 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:49:54,805 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:49:54,807 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:49:54,816 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] [2023-08-04 03:49:54,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:49:54,862 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:49:54,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54 WrapperNode [2023-08-04 03:49:54,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:49:54,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:49:54,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:49:54,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:49:54,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,905 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-04 03:49:54,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:49:54,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:49:54,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:49:54,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:49:54,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:49:54,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:49:54,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:49:54,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:49:54,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (1/1) ... [2023-08-04 03:49:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:49:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:54,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:49:54,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:49:55,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:49:55,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:49:55,007 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 03:49:55,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:49:55,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:49:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 03:49:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 03:49:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:49:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:49:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:49:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:49:55,010 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:49:55,124 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:49:55,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:49:55,274 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:49:55,280 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:49:55,281 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 03:49:55,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:49:55 BoogieIcfgContainer [2023-08-04 03:49:55,282 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:49:55,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:49:55,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:49:55,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:49:55,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:49:54" (1/3) ... [2023-08-04 03:49:55,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d05cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:49:55, skipping insertion in model container [2023-08-04 03:49:55,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:54" (2/3) ... [2023-08-04 03:49:55,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d05cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:49:55, skipping insertion in model container [2023-08-04 03:49:55,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:49:55" (3/3) ... [2023-08-04 03:49:55,290 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_22-deref_read_racefree_bound2.i [2023-08-04 03:49:55,296 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:49:55,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:49:55,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:49:55,304 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:49:55,346 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 03:49:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,420 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-04 03:49:55,421 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:55,426 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. [2023-08-04 03:49:55,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:55,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:55,468 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-04 03:49:55,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:55,477 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. [2023-08-04 03:49:55,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-08-04 03:49:58,172 INFO L134 LiptonReduction]: Checked pairs total: 4764 [2023-08-04 03:49:58,172 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-04 03:49:58,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:49:58,194 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;@26d09295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:49:58,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:49:58,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:49:58,197 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-04 03:49:58,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:58,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:58,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:49:58,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:58,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 11987027, now seen corresponding path program 1 times [2023-08-04 03:49:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:58,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529610310] [2023-08-04 03:49:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:58,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529610310] [2023-08-04 03:49:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529610310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:49:58,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:49:58,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:49:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253091041] [2023-08-04 03:49:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:49:58,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:49:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:49:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:49:58,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2023-08-04 03:49:58,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:58,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2023-08-04 03:49:58,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:58,610 INFO L124 PetriNetUnfolderBase]: 72/176 cut-off events. [2023-08-04 03:49:58,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:58,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 176 events. 72/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 562 event pairs, 56 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2023-08-04 03:49:58,613 INFO L140 encePairwiseOnDemand]: 173/184 looper letters, 23 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2023-08-04 03:49:58,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 127 flow [2023-08-04 03:49:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:49:58,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:49:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 03:49:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2023-08-04 03:49:58,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 03:49:58,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 03:49:58,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:58,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 03:49:58,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,659 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 296 transitions. [2023-08-04 03:49:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 127 flow [2023-08-04 03:49:58,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:49:58,663 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 47 flow [2023-08-04 03:49:58,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-04 03:49:58,669 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-04 03:49:58,669 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 47 flow [2023-08-04 03:49:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:58,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:58,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:49:58,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:58,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash 473755596, now seen corresponding path program 1 times [2023-08-04 03:49:58,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:58,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359110546] [2023-08-04 03:49:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:58,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:58,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359110546] [2023-08-04 03:49:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359110546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:58,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108187798] [2023-08-04 03:49:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:58,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:58,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:49:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:58,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:49:58,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:58,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:58,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108187798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:58,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:58,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:49:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818812882] [2023-08-04 03:49:58,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:49:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:49:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:49:58,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 184 [2023-08-04 03:49:58,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:58,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 184 [2023-08-04 03:49:58,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:58,978 INFO L124 PetriNetUnfolderBase]: 18/54 cut-off events. [2023-08-04 03:49:58,979 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-04 03:49:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 54 events. 18/54 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 8 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 118. Up to 38 conditions per place. [2023-08-04 03:49:58,979 INFO L140 encePairwiseOnDemand]: 181/184 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-04 03:49:58,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 105 flow [2023-08-04 03:49:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:49:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:49:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2023-08-04 03:49:58,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483695652173913 [2023-08-04 03:49:58,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 356 transitions. [2023-08-04 03:49:58,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 356 transitions. [2023-08-04 03:49:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:58,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 356 transitions. [2023-08-04 03:49:58,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,986 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 47 flow. Second operand 4 states and 356 transitions. [2023-08-04 03:49:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 105 flow [2023-08-04 03:49:58,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:49:58,987 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 03:49:58,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 03:49:58,988 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -4 predicate places. [2023-08-04 03:49:58,988 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 03:49:58,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:58,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:49:58,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:59,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:59,196 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:49:59,199 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 03:49:59,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,217 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-04 03:49:59,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:59,218 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. [2023-08-04 03:49:59,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,219 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:59,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2023-08-04 03:49:59,231 INFO L124 PetriNetUnfolderBase]: 14/131 cut-off events. [2023-08-04 03:49:59,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:59,232 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. [2023-08-04 03:49:59,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 2368 [2023-08-04 03:50:01,602 INFO L134 LiptonReduction]: Checked pairs total: 4463 [2023-08-04 03:50:01,603 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-04 03:50:01,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:50:01,605 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;@26d09295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:01,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:01,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:01,608 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-08-04 03:50:01,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:01,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:01,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:50:01,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:50:01,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:01,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1138179058, now seen corresponding path program 1 times [2023-08-04 03:50:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:01,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627001927] [2023-08-04 03:50:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:01,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:01,628 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:50:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:01,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:50:01,653 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:50:01,653 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:50:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:50:01,653 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:50:01,654 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 03:50:01,654 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:50:01,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:50:01,670 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 03:50:01,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,698 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-04 03:50:01,699 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:50:01,702 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. [2023-08-04 03:50:01,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:50:01,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:01,724 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-04 03:50:01,724 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:50:01,725 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. [2023-08-04 03:50:01,730 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-08-04 03:50:04,093 INFO L134 LiptonReduction]: Checked pairs total: 13885 [2023-08-04 03:50:04,094 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 03:50:04,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:50:04,096 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;@26d09295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:04,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:04,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:04,098 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-04 03:50:04,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:04,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:04,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:50:04,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:04,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 22885775, now seen corresponding path program 1 times [2023-08-04 03:50:04,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505926136] [2023-08-04 03:50:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:04,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:04,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505926136] [2023-08-04 03:50:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505926136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:04,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:50:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:50:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692522017] [2023-08-04 03:50:04,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:04,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:50:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:50:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:50:04,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 236 [2023-08-04 03:50:04,154 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) [2023-08-04 03:50:04,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:04,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 236 [2023-08-04 03:50:04,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:04,361 INFO L124 PetriNetUnfolderBase]: 1441/2596 cut-off events. [2023-08-04 03:50:04,362 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 03:50:04,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4995 conditions, 2596 events. 1441/2596 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 14982 event pairs, 640 based on Foata normal form. 360/2736 useless extension candidates. Maximal degree in co-relation 476. Up to 2332 conditions per place. [2023-08-04 03:50:04,373 INFO L140 encePairwiseOnDemand]: 219/236 looper letters, 34 selfloop transitions, 2 changer transitions 4/46 dead transitions. [2023-08-04 03:50:04,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 182 flow [2023-08-04 03:50:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:50:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:50:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-04 03:50:04,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508474576271186 [2023-08-04 03:50:04,375 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-04 03:50:04,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-04 03:50:04,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:04,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-04 03:50:04,377 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) [2023-08-04 03:50:04,378 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) [2023-08-04 03:50:04,379 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) [2023-08-04 03:50:04,379 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 3 states and 390 transitions. [2023-08-04 03:50:04,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 182 flow [2023-08-04 03:50:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 180 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-04 03:50:04,381 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 82 flow [2023-08-04 03:50:04,381 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} [2023-08-04 03:50:04,382 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-04 03:50:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 82 flow [2023-08-04 03:50:04,382 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) [2023-08-04 03:50:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:04,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:04,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:50:04,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:04,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -785528523, now seen corresponding path program 1 times [2023-08-04 03:50:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:04,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673519170] [2023-08-04 03:50:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673519170] [2023-08-04 03:50:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673519170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826178729] [2023-08-04 03:50:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:04,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:04,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:04,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:50:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:04,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:50:04,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:04,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826178729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:50:04,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110328243] [2023-08-04 03:50:04,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:04,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:04,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:50:04,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 236 [2023-08-04 03:50:04,560 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) [2023-08-04 03:50:04,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:04,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 236 [2023-08-04 03:50:04,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:04,755 INFO L124 PetriNetUnfolderBase]: 904/1549 cut-off events. [2023-08-04 03:50:04,756 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-04 03:50:04,758 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 8042 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. [2023-08-04 03:50:04,765 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 50 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 03:50:04,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 246 flow [2023-08-04 03:50:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-04 03:50:04,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201271186440678 [2023-08-04 03:50:04,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-04 03:50:04,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-04 03:50:04,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:04,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-04 03:50:04,769 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) [2023-08-04 03:50:04,771 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) [2023-08-04 03:50:04,772 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) [2023-08-04 03:50:04,772 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 82 flow. Second operand 4 states and 491 transitions. [2023-08-04 03:50:04,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 246 flow [2023-08-04 03:50:04,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 60 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:50:04,775 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-04 03:50:04,775 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} [2023-08-04 03:50:04,777 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-04 03:50:04,778 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-04 03:50:04,779 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) [2023-08-04 03:50:04,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:04,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:04,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:05,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:05,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1532293754, now seen corresponding path program 1 times [2023-08-04 03:50:05,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:05,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049283305] [2023-08-04 03:50:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:05,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049283305] [2023-08-04 03:50:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049283305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:05,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51057321] [2023-08-04 03:50:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:05,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:05,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:05,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:50:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:05,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 03:50:05,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:05,326 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:05,327 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 [2023-08-04 03:50:05,358 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 [2023-08-04 03:50:05,402 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 [2023-08-04 03:50:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:05,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51057321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:05,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 03:50:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8772633] [2023-08-04 03:50:05,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 03:50:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 03:50:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2023-08-04 03:50:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 236 [2023-08-04 03:50:05,630 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) [2023-08-04 03:50:05,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:05,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 236 [2023-08-04 03:50:05,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:05,854 INFO L124 PetriNetUnfolderBase]: 804/1387 cut-off events. [2023-08-04 03:50:05,855 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2023-08-04 03:50:05,857 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 6654 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. [2023-08-04 03:50:05,865 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 41 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2023-08-04 03:50:05,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 250 flow [2023-08-04 03:50:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2023-08-04 03:50:05,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046610169491525 [2023-08-04 03:50:05,868 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2023-08-04 03:50:05,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2023-08-04 03:50:05,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:05,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2023-08-04 03:50:05,876 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) [2023-08-04 03:50:05,878 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) [2023-08-04 03:50:05,878 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) [2023-08-04 03:50:05,879 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 4 states and 382 transitions. [2023-08-04 03:50:05,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 250 flow [2023-08-04 03:50:05,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 238 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:50:05,883 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 128 flow [2023-08-04 03:50:05,883 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} [2023-08-04 03:50:05,884 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-04 03:50:05,884 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 128 flow [2023-08-04 03:50:05,884 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) [2023-08-04 03:50:05,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:05,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:05,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:06,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:06,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:06,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:06,091 INFO L85 PathProgramCache]: Analyzing trace with hash 96247981, now seen corresponding path program 1 times [2023-08-04 03:50:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:06,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596609304] [2023-08-04 03:50:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:06,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596609304] [2023-08-04 03:50:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596609304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149674123] [2023-08-04 03:50:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:06,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:06,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:06,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:06,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:50:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:06,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 03:50:06,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:06,324 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 [2023-08-04 03:50:06,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:50:06,364 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 [2023-08-04 03:50:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:06,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:50:06,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149674123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:06,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:50:06,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-04 03:50:06,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370694779] [2023-08-04 03:50:06,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:06,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:06,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:06,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:06,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 03:50:06,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 236 [2023-08-04 03:50:06,456 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) [2023-08-04 03:50:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 236 [2023-08-04 03:50:06,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:06,560 INFO L124 PetriNetUnfolderBase]: 338/685 cut-off events. [2023-08-04 03:50:06,560 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2023-08-04 03:50:06,562 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 3126 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. [2023-08-04 03:50:06,565 INFO L140 encePairwiseOnDemand]: 226/236 looper letters, 33 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2023-08-04 03:50:06,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 261 flow [2023-08-04 03:50:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-04 03:50:06,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461864406779661 [2023-08-04 03:50:06,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-04 03:50:06,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-04 03:50:06,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:06,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-04 03:50:06,568 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) [2023-08-04 03:50:06,569 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) [2023-08-04 03:50:06,570 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) [2023-08-04 03:50:06,570 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 128 flow. Second operand 4 states and 436 transitions. [2023-08-04 03:50:06,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 261 flow [2023-08-04 03:50:06,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 261 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:50:06,573 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 148 flow [2023-08-04 03:50:06,573 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} [2023-08-04 03:50:06,574 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 03:50:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 148 flow [2023-08-04 03:50:06,574 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) [2023-08-04 03:50:06,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:06,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:06,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:06,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:06,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:06,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash -602678957, now seen corresponding path program 1 times [2023-08-04 03:50:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:06,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532158317] [2023-08-04 03:50:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532158317] [2023-08-04 03:50:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532158317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457503488] [2023-08-04 03:50:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:06,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:06,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:06,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:06,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:50:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:06,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 03:50:06,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:07,000 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 [2023-08-04 03:50:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:50:07,043 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 [2023-08-04 03:50:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:07,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:07,108 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:50:07,109 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 [2023-08-04 03:50:07,113 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 [2023-08-04 03:50:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:07,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457503488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:07,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:07,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 03:50:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456487691] [2023-08-04 03:50:07,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:07,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 03:50:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 03:50:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-08-04 03:50:07,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 236 [2023-08-04 03:50:07,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 148 flow. Second operand has 10 states, 10 states have (on average 104.2) internal successors, (1042), 10 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:07,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:07,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 236 [2023-08-04 03:50:07,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:07,468 INFO L124 PetriNetUnfolderBase]: 62/202 cut-off events. [2023-08-04 03:50:07,468 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2023-08-04 03:50:07,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 202 events. 62/202 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 6 based on Foata normal form. 70/272 useless extension candidates. Maximal degree in co-relation 540. Up to 149 conditions per place. [2023-08-04 03:50:07,469 INFO L140 encePairwiseOnDemand]: 230/236 looper letters, 26 selfloop transitions, 6 changer transitions 1/39 dead transitions. [2023-08-04 03:50:07,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 39 transitions, 225 flow [2023-08-04 03:50:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-04 03:50:07,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608050847457627 [2023-08-04 03:50:07,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-04 03:50:07,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-04 03:50:07,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:07,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-04 03:50:07,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:07,474 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) [2023-08-04 03:50:07,475 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) [2023-08-04 03:50:07,475 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 148 flow. Second operand 4 states and 435 transitions. [2023-08-04 03:50:07,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 39 transitions, 225 flow [2023-08-04 03:50:07,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:50:07,477 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 120 flow [2023-08-04 03:50:07,477 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} [2023-08-04 03:50:07,478 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-04 03:50:07,478 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 120 flow [2023-08-04 03:50:07,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.2) internal successors, (1042), 10 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:07,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:07,479 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] [2023-08-04 03:50:07,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:07,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:07,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash 935362958, now seen corresponding path program 1 times [2023-08-04 03:50:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935765174] [2023-08-04 03:50:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:07,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:08,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:08,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935765174] [2023-08-04 03:50:08,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935765174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861795895] [2023-08-04 03:50:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:08,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:08,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:08,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:50:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:08,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 03:50:08,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:08,180 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:08,180 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 [2023-08-04 03:50:08,204 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 [2023-08-04 03:50:08,233 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 [2023-08-04 03:50:08,284 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 [2023-08-04 03:50:08,344 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 [2023-08-04 03:50:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:08,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:08,419 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_200 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_200) c_~p~0.base) c_~p~0.offset) 0)) is different from false [2023-08-04 03:50:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-04 03:50:08,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861795895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:08,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:08,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-04 03:50:08,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857735379] [2023-08-04 03:50:08,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 03:50:08,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 03:50:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=145, Unknown=1, NotChecked=24, Total=210 [2023-08-04 03:50:08,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 236 [2023-08-04 03:50:08,477 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) [2023-08-04 03:50:08,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:08,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 236 [2023-08-04 03:50:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:08,671 INFO L124 PetriNetUnfolderBase]: 90/281 cut-off events. [2023-08-04 03:50:08,671 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-08-04 03:50:08,672 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. [2023-08-04 03:50:08,673 INFO L140 encePairwiseOnDemand]: 227/236 looper letters, 61 selfloop transitions, 12 changer transitions 4/82 dead transitions. [2023-08-04 03:50:08,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 475 flow [2023-08-04 03:50:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 03:50:08,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 03:50:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 954 transitions. [2023-08-04 03:50:08,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674884437596302 [2023-08-04 03:50:08,676 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 954 transitions. [2023-08-04 03:50:08,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 954 transitions. [2023-08-04 03:50:08,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:08,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 954 transitions. [2023-08-04 03:50:08,679 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) [2023-08-04 03:50:08,683 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) [2023-08-04 03:50:08,683 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) [2023-08-04 03:50:08,684 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 120 flow. Second operand 11 states and 954 transitions. [2023-08-04 03:50:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 475 flow [2023-08-04 03:50:08,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 459 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:50:08,686 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 199 flow [2023-08-04 03:50:08,686 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} [2023-08-04 03:50:08,687 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-08-04 03:50:08,687 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 199 flow [2023-08-04 03:50:08,688 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) [2023-08-04 03:50:08,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:08,688 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] [2023-08-04 03:50:08,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:08,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:08,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:08,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash 616916402, now seen corresponding path program 1 times [2023-08-04 03:50:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141209758] [2023-08-04 03:50:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:08,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:09,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:09,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141209758] [2023-08-04 03:50:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141209758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:09,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14506386] [2023-08-04 03:50:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:09,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:09,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:50:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:09,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-04 03:50:09,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:09,319 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:09,319 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 [2023-08-04 03:50:09,345 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 [2023-08-04 03:50:09,377 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 [2023-08-04 03:50:09,445 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 [2023-08-04 03:50:09,495 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 [2023-08-04 03:50:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:09,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:09,580 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_258) c_~p~0.base) c_~p~0.offset) 0)) is different from false [2023-08-04 03:50:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-04 03:50:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14506386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:09,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-04 03:50:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422127103] [2023-08-04 03:50:09,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 03:50:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 03:50:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=145, Unknown=1, NotChecked=24, Total=210 [2023-08-04 03:50:09,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 236 [2023-08-04 03:50:09,675 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) [2023-08-04 03:50:09,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:09,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 236 [2023-08-04 03:50:09,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:09,919 INFO L124 PetriNetUnfolderBase]: 90/277 cut-off events. [2023-08-04 03:50:09,919 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-08-04 03:50:09,920 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 1213 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. [2023-08-04 03:50:09,921 INFO L140 encePairwiseOnDemand]: 227/236 looper letters, 48 selfloop transitions, 8 changer transitions 2/63 dead transitions. [2023-08-04 03:50:09,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 393 flow [2023-08-04 03:50:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 03:50:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 03:50:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 769 transitions. [2023-08-04 03:50:09,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620527306967985 [2023-08-04 03:50:09,924 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 769 transitions. [2023-08-04 03:50:09,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 769 transitions. [2023-08-04 03:50:09,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:09,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 769 transitions. [2023-08-04 03:50:09,926 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) [2023-08-04 03:50:09,929 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) [2023-08-04 03:50:09,930 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) [2023-08-04 03:50:09,930 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 199 flow. Second operand 9 states and 769 transitions. [2023-08-04 03:50:09,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 393 flow [2023-08-04 03:50:09,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-04 03:50:09,934 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 235 flow [2023-08-04 03:50:09,935 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} [2023-08-04 03:50:09,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2023-08-04 03:50:09,936 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 235 flow [2023-08-04 03:50:09,936 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) [2023-08-04 03:50:09,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:09,937 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] [2023-08-04 03:50:09,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:10,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:10,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:10,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -935620838, now seen corresponding path program 2 times [2023-08-04 03:50:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001659227] [2023-08-04 03:50:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:10,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001659227] [2023-08-04 03:50:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001659227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536063560] [2023-08-04 03:50:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:50:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:10,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:50:10,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:50:10,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:50:10,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 03:50:10,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:10,595 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:10,595 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 [2023-08-04 03:50:10,617 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 [2023-08-04 03:50:10,693 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 [2023-08-04 03:50:10,730 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 [2023-08-04 03:50:10,790 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 [2023-08-04 03:50:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:10,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:10,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536063560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:10,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:10,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-04 03:50:10,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571231607] [2023-08-04 03:50:10,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 03:50:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 03:50:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-08-04 03:50:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 236 [2023-08-04 03:50:11,443 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) [2023-08-04 03:50:11,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:11,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 236 [2023-08-04 03:50:11,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:11,635 INFO L124 PetriNetUnfolderBase]: 86/272 cut-off events. [2023-08-04 03:50:11,636 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-08-04 03:50:11,637 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 1168 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. [2023-08-04 03:50:11,638 INFO L140 encePairwiseOnDemand]: 228/236 looper letters, 46 selfloop transitions, 12 changer transitions 2/67 dead transitions. [2023-08-04 03:50:11,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 448 flow [2023-08-04 03:50:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 03:50:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 03:50:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 740 transitions. [2023-08-04 03:50:11,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44794188861985473 [2023-08-04 03:50:11,640 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 740 transitions. [2023-08-04 03:50:11,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 740 transitions. [2023-08-04 03:50:11,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:11,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 740 transitions. [2023-08-04 03:50:11,642 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) [2023-08-04 03:50:11,644 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) [2023-08-04 03:50:11,645 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) [2023-08-04 03:50:11,645 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 235 flow. Second operand 7 states and 740 transitions. [2023-08-04 03:50:11,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 448 flow [2023-08-04 03:50:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:50:11,648 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 285 flow [2023-08-04 03:50:11,648 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} [2023-08-04 03:50:11,649 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2023-08-04 03:50:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 285 flow [2023-08-04 03:50:11,649 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) [2023-08-04 03:50:11,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:11,650 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] [2023-08-04 03:50:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:11,854 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,SelfDestructingSolverStorable10 [2023-08-04 03:50:11,854 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:11,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:11,855 INFO L85 PathProgramCache]: Analyzing trace with hash 551714664, now seen corresponding path program 1 times [2023-08-04 03:50:11,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:11,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677714509] [2023-08-04 03:50:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677714509] [2023-08-04 03:50:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677714509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:12,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793049354] [2023-08-04 03:50:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:12,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:12,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:12,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:50:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:12,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 03:50:12,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:12,393 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:12,393 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 [2023-08-04 03:50:12,416 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 [2023-08-04 03:50:12,442 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 [2023-08-04 03:50:12,495 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 [2023-08-04 03:50:12,545 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 [2023-08-04 03:50:12,607 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 [2023-08-04 03:50:12,651 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 [2023-08-04 03:50:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:12,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:50:12,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793049354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:12,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:12,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-04 03:50:12,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917809431] [2023-08-04 03:50:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:12,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 03:50:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 03:50:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=282, Unknown=3, NotChecked=0, Total=342 [2023-08-04 03:50:13,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 236 [2023-08-04 03:50:13,351 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) [2023-08-04 03:50:13,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:13,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 236 [2023-08-04 03:50:13,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:13,678 INFO L124 PetriNetUnfolderBase]: 98/311 cut-off events. [2023-08-04 03:50:13,678 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-08-04 03:50:13,679 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 1437 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. [2023-08-04 03:50:13,680 INFO L140 encePairwiseOnDemand]: 223/236 looper letters, 32 selfloop transitions, 7 changer transitions 62/106 dead transitions. [2023-08-04 03:50:13,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 745 flow [2023-08-04 03:50:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 03:50:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 03:50:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1613 transitions. [2023-08-04 03:50:13,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34173728813559323 [2023-08-04 03:50:13,686 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1613 transitions. [2023-08-04 03:50:13,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1613 transitions. [2023-08-04 03:50:13,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:13,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1613 transitions. [2023-08-04 03:50:13,690 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) [2023-08-04 03:50:13,695 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) [2023-08-04 03:50:13,696 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) [2023-08-04 03:50:13,696 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 285 flow. Second operand 20 states and 1613 transitions. [2023-08-04 03:50:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 745 flow [2023-08-04 03:50:13,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 106 transitions, 703 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-04 03:50:13,701 INFO L231 Difference]: Finished difference. Result has 97 places, 36 transitions, 214 flow [2023-08-04 03:50:13,701 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} [2023-08-04 03:50:13,701 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 57 predicate places. [2023-08-04 03:50:13,701 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 36 transitions, 214 flow [2023-08-04 03:50:13,702 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) [2023-08-04 03:50:13,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:13,702 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] [2023-08-04 03:50:13,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:13,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:13,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:13,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash -605248238, now seen corresponding path program 2 times [2023-08-04 03:50:13,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:13,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295073948] [2023-08-04 03:50:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:13,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:14,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295073948] [2023-08-04 03:50:14,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295073948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082983685] [2023-08-04 03:50:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:50:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:14,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:14,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:50:14,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:50:14,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:50:14,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 03:50:14,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:14,452 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:50:14,453 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 [2023-08-04 03:50:14,479 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 [2023-08-04 03:50:14,552 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 [2023-08-04 03:50:14,582 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 [2023-08-04 03:50:14,639 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 [2023-08-04 03:50:14,709 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 [2023-08-04 03:50:14,752 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 [2023-08-04 03:50:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:14,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:14,870 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_502 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_502) c_~p~0.base) c_~p~0.offset) 1)) (forall ((v_ArrVal_502 (Array Int Int))) (<= 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_502) c_~p~0.base) c_~p~0.offset)))) is different from false [2023-08-04 03:50:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-04 03:50:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082983685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:14,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-04 03:50:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464875817] [2023-08-04 03:50:14,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 03:50:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 03:50:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-04 03:50:15,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 236 [2023-08-04 03:50:15,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 36 transitions, 214 flow. Second operand has 21 states, 21 states have (on average 78.85714285714286) internal successors, (1656), 21 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:15,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:15,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 236 [2023-08-04 03:50:15,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:15,249 INFO L124 PetriNetUnfolderBase]: 58/181 cut-off events. [2023-08-04 03:50:15,249 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2023-08-04 03:50:15,250 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 613 event pairs, 31 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 632. Up to 82 conditions per place. [2023-08-04 03:50:15,250 INFO L140 encePairwiseOnDemand]: 224/236 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-04 03:50:15,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 47 transitions, 358 flow [2023-08-04 03:50:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 03:50:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 03:50:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 796 transitions. [2023-08-04 03:50:15,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33728813559322035 [2023-08-04 03:50:15,253 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 796 transitions. [2023-08-04 03:50:15,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 796 transitions. [2023-08-04 03:50:15,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:15,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 796 transitions. [2023-08-04 03:50:15,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.6) internal successors, (796), 10 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:15,259 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) [2023-08-04 03:50:15,260 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) [2023-08-04 03:50:15,260 INFO L175 Difference]: Start difference. First operand has 97 places, 36 transitions, 214 flow. Second operand 10 states and 796 transitions. [2023-08-04 03:50:15,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 47 transitions, 358 flow [2023-08-04 03:50:15,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 293 flow, removed 14 selfloop flow, removed 24 redundant places. [2023-08-04 03:50:15,263 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-08-04 03:50:15,263 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} [2023-08-04 03:50:15,263 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2023-08-04 03:50:15,264 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-08-04 03:50:15,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 78.85714285714286) internal successors, (1656), 21 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:15,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:50:15,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:15,469 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,SelfDestructingSolverStorable12 [2023-08-04 03:50:15,470 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:15,470 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 03:50:15,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,487 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-04 03:50:15,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:50:15,488 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. [2023-08-04 03:50:15,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:50:15,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,490 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 133 transitions, 278 flow [2023-08-04 03:50:15,504 INFO L124 PetriNetUnfolderBase]: 24/200 cut-off events. [2023-08-04 03:50:15,504 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:50:15,505 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. [2023-08-04 03:50:15,508 INFO L119 LiptonReduction]: Number of co-enabled transitions 6848 [2023-08-04 03:50:17,863 INFO L134 LiptonReduction]: Checked pairs total: 14165 [2023-08-04 03:50:17,863 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 03:50:17,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:50:17,865 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;@26d09295, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:17,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:17,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:17,870 INFO L124 PetriNetUnfolderBase]: 10/49 cut-off events. [2023-08-04 03:50:17,870 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 03:50:17,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:17,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:50:17,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:50:17,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash -917069317, now seen corresponding path program 1 times [2023-08-04 03:50:17,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346599496] [2023-08-04 03:50:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346599496] [2023-08-04 03:50:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346599496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234378343] [2023-08-04 03:50:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:17,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:17,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:17,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 03:50:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:18,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:50:18,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:18,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:50:18,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234378343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:18,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:50:18,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:50:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306175397] [2023-08-04 03:50:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:50:18,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 237 [2023-08-04 03:50:18,034 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) [2023-08-04 03:50:18,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:18,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 237 [2023-08-04 03:50:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:18,203 INFO L124 PetriNetUnfolderBase]: 1280/2117 cut-off events. [2023-08-04 03:50:18,203 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 03:50:18,206 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 84. Compared 12006 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. [2023-08-04 03:50:18,208 INFO L140 encePairwiseOnDemand]: 219/237 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-04 03:50:18,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 252 flow [2023-08-04 03:50:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:50:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:50:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2023-08-04 03:50:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367088607594936 [2023-08-04 03:50:18,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 636 transitions. [2023-08-04 03:50:18,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 636 transitions. [2023-08-04 03:50:18,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:18,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 636 transitions. [2023-08-04 03:50:18,213 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) [2023-08-04 03:50:18,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:18,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:50:18,215 INFO L175 Difference]: Start difference. First operand has 40 places, 49 transitions, 110 flow. Second operand 5 states and 636 transitions. [2023-08-04 03:50:18,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 252 flow [2023-08-04 03:50:18,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:50:18,217 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-04 03:50:18,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, 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} [2023-08-04 03:50:18,218 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 03:50:18,219 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-04 03:50:18,219 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) [2023-08-04 03:50:18,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:50:18,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:18,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:50:18,424 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:50:18,425 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 03:50:18,425 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:50:18,425 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:50:18,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:50:18 BasicIcfg [2023-08-04 03:50:18,430 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:50:18,431 INFO L158 Benchmark]: Toolchain (without parser) took 23989.19ms. Allocated memory was 534.8MB in the beginning and 771.8MB in the end (delta: 237.0MB). Free memory was 486.0MB in the beginning and 479.3MB in the end (delta: 6.7MB). Peak memory consumption was 244.9MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,431 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 362.8MB. Free memory was 316.5MB in the beginning and 316.4MB in the end (delta: 169.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,431 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.21ms. Allocated memory is still 534.8MB. Free memory was 486.0MB in the beginning and 466.2MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.56ms. Allocated memory is still 534.8MB. Free memory was 466.2MB in the beginning and 464.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,432 INFO L158 Benchmark]: Boogie Preprocessor took 36.48ms. Allocated memory is still 534.8MB. Free memory was 464.1MB in the beginning and 462.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,433 INFO L158 Benchmark]: RCFGBuilder took 339.39ms. Allocated memory is still 534.8MB. Free memory was 462.6MB in the beginning and 495.9MB in the end (delta: -33.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,434 INFO L158 Benchmark]: TraceAbstraction took 23146.13ms. Allocated memory was 534.8MB in the beginning and 771.8MB in the end (delta: 237.0MB). Free memory was 495.2MB in the beginning and 479.3MB in the end (delta: 15.9MB). Peak memory consumption was 251.5MB. Max. memory is 16.0GB. [2023-08-04 03:50:18,435 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 362.8MB. Free memory was 316.5MB in the beginning and 316.4MB in the end (delta: 169.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 420.21ms. Allocated memory is still 534.8MB. Free memory was 486.0MB in the beginning and 466.2MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.56ms. Allocated memory is still 534.8MB. Free memory was 466.2MB in the beginning and 464.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.48ms. Allocated memory is still 534.8MB. Free memory was 464.1MB in the beginning and 462.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 339.39ms. Allocated memory is still 534.8MB. Free memory was 462.6MB in the beginning and 495.9MB in the end (delta: -33.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.0GB. * TraceAbstraction took 23146.13ms. Allocated memory was 534.8MB in the beginning and 771.8MB in the end (delta: 237.0MB). Free memory was 495.2MB in the beginning and 479.3MB in the end (delta: 15.9MB). Peak memory consumption was 251.5MB. 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: 2.7s, 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: 2.4s, 93 PlacesBefore, 25 PlacesAfterwards, 100 TransitionsBefore, 30 TransitionsAfterwards, 2368 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 2 ChoiceCompositions, 85 TotalNumberOfCompositions, 4463 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2332, independent: 2164, independent conditional: 0, independent unconditional: 2164, dependent: 168, dependent conditional: 0, dependent unconditional: 168, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1298, independent: 1258, independent conditional: 0, independent unconditional: 1258, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2332, independent: 906, independent conditional: 0, independent unconditional: 906, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 1298, unknown conditional: 0, unknown unconditional: 1298] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 56, Positive conditional cache size: 0, Positive unconditional cache size: 56, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 122 PlacesBefore, 40 PlacesAfterwards, 133 TransitionsBefore, 49 TransitionsAfterwards, 6848 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 2 ChoiceCompositions, 103 TotalNumberOfCompositions, 13885 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6203, independent: 5939, independent conditional: 0, independent unconditional: 5939, dependent: 264, dependent conditional: 0, dependent unconditional: 264, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3432, independent: 3377, independent conditional: 0, independent unconditional: 3377, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6203, independent: 2562, independent conditional: 0, independent unconditional: 2562, dependent: 209, dependent conditional: 0, dependent unconditional: 209, unknown: 3432, unknown conditional: 0, unknown unconditional: 3432] , Statistics on independence cache: Total cache size (in pairs): 188, Positive cache size: 164, Positive conditional cache size: 0, Positive unconditional cache size: 164, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 122 PlacesBefore, 40 PlacesAfterwards, 133 TransitionsBefore, 49 TransitionsAfterwards, 6848 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 2 ChoiceCompositions, 104 TotalNumberOfCompositions, 14165 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5751, independent: 5483, independent conditional: 0, independent unconditional: 5483, dependent: 268, dependent conditional: 0, dependent unconditional: 268, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3416, independent: 3352, independent conditional: 0, independent unconditional: 3352, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5751, independent: 2131, independent conditional: 0, independent unconditional: 2131, dependent: 204, dependent conditional: 0, dependent unconditional: 204, unknown: 3416, unknown conditional: 0, unknown unconditional: 3416] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 159, Positive conditional cache size: 0, Positive unconditional cache size: 159, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30, 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 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: 3.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 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: 13.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 1379 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1126 mSDsluCounter, 1268 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 234 IncrementalHoareTripleChecker+Unchecked, 1213 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5695 IncrementalHoareTripleChecker+Invalid, 6117 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 55 mSDtfsCounter, 5695 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 440 GetRequests, 304 SyntacticMatches, 13 SemanticMatches, 123 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.0s 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, 4.4s InterpolantComputationTime, 388 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 536 ConstructedInterpolants, 28 QuantifiedInterpolants, 5587 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1774 ConjunctsInSsa, 295 ConjunctsInUnsatCore, 27 InterpolantComputations, 2 PerfectInterpolantSequences, 31/141 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 - 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: 2.4s, 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: 3.0s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, 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, 0.0s 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 03:50:18,457 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...