/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:34:16,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:34:16,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:34:16,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:34:16,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:34:16,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:34:16,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:34:16,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:34:16,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:34:16,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:34:16,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:34:16,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:34:16,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:34:16,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:34:16,527 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:34:16,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:34:16,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:34:16,528 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:34:16,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:34:16,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:34:16,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:34:16,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:34:16,529 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:34:16,529 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:34:16,530 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:34:16,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:34:16,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:34:16,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:34:16,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:34:16,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:34:16,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:34:16,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:34:16,533 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:34:16,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:34:16,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:34:16,534 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:34:16,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:34:16,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:34:16,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:34:16,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:34:16,770 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:34:16,770 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:34:16,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-04 04:34:17,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:34:18,138 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:34:18,138 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-04 04:34:18,159 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/587369e70/9d3582733e5746aaaf74a74981a2601c/FLAG732714607 [2023-08-04 04:34:18,174 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/587369e70/9d3582733e5746aaaf74a74981a2601c [2023-08-04 04:34:18,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:34:18,180 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:34:18,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:34:18,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:34:18,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:34:18,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f05ed87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18, skipping insertion in model container [2023-08-04 04:34:18,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,232 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:34:18,363 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-04 04:34:18,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:34:18,480 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:34:18,493 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i[1105,1118] [2023-08-04 04:34:18,510 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-04 04:34:18,511 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-04 04:34:18,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:34:18,561 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:34:18,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18 WrapperNode [2023-08-04 04:34:18,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:34:18,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:34:18,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:34:18,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:34:18,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,594 INFO L138 Inliner]: procedures = 162, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-04 04:34:18,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:34:18,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:34:18,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:34:18,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:34:18,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,609 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,611 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:34:18,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:34:18,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:34:18,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:34:18,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (1/1) ... [2023-08-04 04:34:18,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:34:18,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:18,643 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 04:34:18,660 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 04:34:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-08-04 04:34:18,679 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-08-04 04:34:18,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:34:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:34:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:34:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:34:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:34:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:34:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:34:18,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:34:18,682 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 04:34:18,780 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:34:18,782 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:34:18,897 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:34:18,903 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:34:18,903 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 04:34:18,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:34:18 BoogieIcfgContainer [2023-08-04 04:34:18,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:34:18,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:34:18,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:34:18,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:34:18,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:34:18" (1/3) ... [2023-08-04 04:34:18,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c44abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:34:18, skipping insertion in model container [2023-08-04 04:34:18,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:34:18" (2/3) ... [2023-08-04 04:34:18,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c44abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:34:18, skipping insertion in model container [2023-08-04 04:34:18,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:34:18" (3/3) ... [2023-08-04 04:34:18,911 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_52-refine-protected-loop2-small_true_bound2.i [2023-08-04 04:34:18,918 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:34:18,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:34:18,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:34:18,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:34:18,965 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:34:18,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,028 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-04 04:34:19,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:19,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-04 04:34:19,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,038 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:19,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,048 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:19,068 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-04 04:34:19,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-04 04:34:19,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 918 [2023-08-04 04:34:21,851 INFO L134 LiptonReduction]: Checked pairs total: 675 [2023-08-04 04:34:21,851 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 04:34:21,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:34:21,869 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;@aa6bb4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:21,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:34:21,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:21,873 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-04 04:34:21,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:21,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:21,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:34:21,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:21,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash 292003624, now seen corresponding path program 1 times [2023-08-04 04:34:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:21,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603865331] [2023-08-04 04:34:21,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:22,046 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 04:34:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:22,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603865331] [2023-08-04 04:34:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603865331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:22,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 04:34:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083250928] [2023-08-04 04:34:22,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:22,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 04:34:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 04:34:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 04:34:22,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 148 [2023-08-04 04:34:22,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 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 04:34:22,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:22,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 148 [2023-08-04 04:34:22,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:22,105 INFO L124 PetriNetUnfolderBase]: 6/18 cut-off events. [2023-08-04 04:34:22,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:22,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 18 events. 6/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 2 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 25. Up to 17 conditions per place. [2023-08-04 04:34:22,107 INFO L140 encePairwiseOnDemand]: 146/148 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-08-04 04:34:22,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 33 flow [2023-08-04 04:34:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 04:34:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 04:34:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 144 transitions. [2023-08-04 04:34:22,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-08-04 04:34:22,123 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 144 transitions. [2023-08-04 04:34:22,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 144 transitions. [2023-08-04 04:34:22,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:22,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 144 transitions. [2023-08-04 04:34:22,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 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 04:34:22,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 04:34:22,145 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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 04:34:22,147 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 144 transitions. [2023-08-04 04:34:22,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 33 flow [2023-08-04 04:34:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 33 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:22,150 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-08-04 04:34:22,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-08-04 04:34:22,155 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-08-04 04:34:22,155 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-08-04 04:34:22,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 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 04:34:22,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-04 04:34:22,158 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-04 04:34:22,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:34:22,158 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:34:22,164 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-04 04:34:22,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,202 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-04 04:34:22,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:22,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-04 04:34:22,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,204 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:22,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,205 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 74 transitions, 153 flow [2023-08-04 04:34:22,223 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-04 04:34:22,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:22,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-04 04:34:22,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 918 [2023-08-04 04:34:24,874 INFO L134 LiptonReduction]: Checked pairs total: 683 [2023-08-04 04:34:24,874 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 04:34:24,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:34:24,877 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;@aa6bb4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:24,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:24,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:24,879 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-04 04:34:24,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:34:24,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:24,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:34:24,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:34:24,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1642964687, now seen corresponding path program 1 times [2023-08-04 04:34:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:24,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284502601] [2023-08-04 04:34:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:34:24,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:34:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:34:24,946 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:34:24,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:34:24,947 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:34:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:34:24,947 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:34:24,948 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:34:24,948 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:34:24,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:34:24,961 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:34:24,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,978 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-04 04:34:24,979 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:24,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-04 04:34:24,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,981 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:24,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:24,995 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-04 04:34:24,995 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-04 04:34:24,998 INFO L119 LiptonReduction]: Number of co-enabled transitions 3348 [2023-08-04 04:34:27,056 INFO L134 LiptonReduction]: Checked pairs total: 7943 [2023-08-04 04:34:27,056 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 04:34:27,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:34:27,059 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;@aa6bb4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:27,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:34:27,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:27,062 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 04:34:27,062 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:34:27,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:27,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:27,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:27,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -905966520, now seen corresponding path program 1 times [2023-08-04 04:34:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727194253] [2023-08-04 04:34:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:27,233 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 04:34:27,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727194253] [2023-08-04 04:34:27,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727194253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:27,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:27,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:34:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030213445] [2023-08-04 04:34:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:27,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:27,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:27,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-04 04:34:27,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 04:34:27,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:27,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-04 04:34:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:27,389 INFO L124 PetriNetUnfolderBase]: 531/1053 cut-off events. [2023-08-04 04:34:27,389 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 04:34:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 1053 events. 531/1053 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5563 event pairs, 217 based on Foata normal form. 68/997 useless extension candidates. Maximal degree in co-relation 1310. Up to 536 conditions per place. [2023-08-04 04:34:27,396 INFO L140 encePairwiseOnDemand]: 171/181 looper letters, 32 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-04 04:34:27,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 185 flow [2023-08-04 04:34:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 04:34:27,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451197053406999 [2023-08-04 04:34:27,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 04:34:27,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 04:34:27,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:27,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 04:34:27,405 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 04:34:27,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 04:34:27,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 04:34:27,408 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 3 states and 296 transitions. [2023-08-04 04:34:27,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 185 flow [2023-08-04 04:34:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 183 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:27,410 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 116 flow [2023-08-04 04:34:27,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-04 04:34:27,411 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-04 04:34:27,411 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 116 flow [2023-08-04 04:34:27,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 04:34:27,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:27,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:27,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:34:27,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:27,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash -193862283, now seen corresponding path program 1 times [2023-08-04 04:34:27,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:27,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476601851] [2023-08-04 04:34:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:27,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:34:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:27,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476601851] [2023-08-04 04:34:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476601851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:34:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50565521] [2023-08-04 04:34:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:34:27,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:34:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:34:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 181 [2023-08-04 04:34:27,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 04:34:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 181 [2023-08-04 04:34:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:27,717 INFO L124 PetriNetUnfolderBase]: 698/1346 cut-off events. [2023-08-04 04:34:27,717 INFO L125 PetriNetUnfolderBase]: For 413/425 co-relation queries the response was YES. [2023-08-04 04:34:27,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1346 events. 698/1346 cut-off events. For 413/425 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6694 event pairs, 209 based on Foata normal form. 56/1268 useless extension candidates. Maximal degree in co-relation 2331. Up to 566 conditions per place. [2023-08-04 04:34:27,724 INFO L140 encePairwiseOnDemand]: 174/181 looper letters, 35 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-08-04 04:34:27,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 259 flow [2023-08-04 04:34:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:34:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:34:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-04 04:34:27,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377532228360957 [2023-08-04 04:34:27,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-04 04:34:27,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-04 04:34:27,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:27,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-04 04:34:27,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 04:34:27,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 04:34:27,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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 04:34:27,729 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 116 flow. Second operand 3 states and 292 transitions. [2023-08-04 04:34:27,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 259 flow [2023-08-04 04:34:27,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:34:27,732 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 149 flow [2023-08-04 04:34:27,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2023-08-04 04:34:27,733 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 04:34:27,733 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 149 flow [2023-08-04 04:34:27,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 04:34:27,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:27,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:27,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:34:27,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:27,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash -386123650, now seen corresponding path program 1 times [2023-08-04 04:34:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:27,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762558976] [2023-08-04 04:34:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:34:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762558976] [2023-08-04 04:34:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762558976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:27,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:27,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:34:27,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124671854] [2023-08-04 04:34:27,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:27,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:34:27,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:34:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:34:27,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-04 04:34:27,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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 04:34:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-04 04:34:27,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:28,096 INFO L124 PetriNetUnfolderBase]: 998/1907 cut-off events. [2023-08-04 04:34:28,096 INFO L125 PetriNetUnfolderBase]: For 635/659 co-relation queries the response was YES. [2023-08-04 04:34:28,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 1907 events. 998/1907 cut-off events. For 635/659 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9714 event pairs, 218 based on Foata normal form. 52/1788 useless extension candidates. Maximal degree in co-relation 3568. Up to 578 conditions per place. [2023-08-04 04:34:28,105 INFO L140 encePairwiseOnDemand]: 173/181 looper letters, 68 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2023-08-04 04:34:28,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 101 transitions, 540 flow [2023-08-04 04:34:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:34:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:34:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 657 transitions. [2023-08-04 04:34:28,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185477505919495 [2023-08-04 04:34:28,108 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 657 transitions. [2023-08-04 04:34:28,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 657 transitions. [2023-08-04 04:34:28,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:28,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 657 transitions. [2023-08-04 04:34:28,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.85714285714286) internal successors, (657), 7 states have internal predecessors, (657), 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 04:34:28,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 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 04:34:28,113 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 181.0) internal successors, (1448), 8 states have internal predecessors, (1448), 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 04:34:28,113 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 149 flow. Second operand 7 states and 657 transitions. [2023-08-04 04:34:28,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 101 transitions, 540 flow [2023-08-04 04:34:28,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 101 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:28,116 INFO L231 Difference]: Finished difference. Result has 48 places, 58 transitions, 287 flow [2023-08-04 04:34:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=48, PETRI_TRANSITIONS=58} [2023-08-04 04:34:28,117 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-08-04 04:34:28,117 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 58 transitions, 287 flow [2023-08-04 04:34:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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 04:34:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:28,118 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] [2023-08-04 04:34:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 04:34:28,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:28,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash 787487850, now seen corresponding path program 1 times [2023-08-04 04:34:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983102797] [2023-08-04 04:34:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:34:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983102797] [2023-08-04 04:34:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983102797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:28,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:34:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:34:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710026905] [2023-08-04 04:34:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:28,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:34:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:34:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:34:28,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 181 [2023-08-04 04:34:28,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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 04:34:28,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:28,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 181 [2023-08-04 04:34:28,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:28,510 INFO L124 PetriNetUnfolderBase]: 1411/2647 cut-off events. [2023-08-04 04:34:28,511 INFO L125 PetriNetUnfolderBase]: For 2291/2327 co-relation queries the response was YES. [2023-08-04 04:34:28,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7398 conditions, 2647 events. 1411/2647 cut-off events. For 2291/2327 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14135 event pairs, 398 based on Foata normal form. 40/2437 useless extension candidates. Maximal degree in co-relation 6182. Up to 1004 conditions per place. [2023-08-04 04:34:28,530 INFO L140 encePairwiseOnDemand]: 174/181 looper letters, 73 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2023-08-04 04:34:28,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 113 transitions, 728 flow [2023-08-04 04:34:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:34:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:34:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2023-08-04 04:34:28,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174953959484346 [2023-08-04 04:34:28,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2023-08-04 04:34:28,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2023-08-04 04:34:28,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:28,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2023-08-04 04:34:28,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 states have internal predecessors, (562), 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 04:34:28,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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 04:34:28,537 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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 04:34:28,537 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 287 flow. Second operand 6 states and 562 transitions. [2023-08-04 04:34:28,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 113 transitions, 728 flow [2023-08-04 04:34:28,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 113 transitions, 716 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:28,545 INFO L231 Difference]: Finished difference. Result has 56 places, 73 transitions, 473 flow [2023-08-04 04:34:28,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=56, PETRI_TRANSITIONS=73} [2023-08-04 04:34:28,546 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2023-08-04 04:34:28,546 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 73 transitions, 473 flow [2023-08-04 04:34:28,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 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 04:34:28,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:28,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:28,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:34:28,547 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:28,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1872109147, now seen corresponding path program 2 times [2023-08-04 04:34:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:28,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123903990] [2023-08-04 04:34:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:28,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:34:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123903990] [2023-08-04 04:34:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123903990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062347577] [2023-08-04 04:34:28,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 04:34:28,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:28,663 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 04:34:28,689 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 04:34:28,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 04:34:28,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 04:34:28,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 04:34:28,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:34:28,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:34:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062347577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:28,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-04 04:34:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845718892] [2023-08-04 04:34:28,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 04:34:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 04:34:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-04 04:34:28,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-04 04:34:28,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 73 transitions, 473 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 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 04:34:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:28,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-04 04:34:28,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:29,941 INFO L124 PetriNetUnfolderBase]: 2913/5103 cut-off events. [2023-08-04 04:34:29,941 INFO L125 PetriNetUnfolderBase]: For 8863/8911 co-relation queries the response was YES. [2023-08-04 04:34:29,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 5103 events. 2913/5103 cut-off events. For 8863/8911 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 26387 event pairs, 304 based on Foata normal form. 88/4725 useless extension candidates. Maximal degree in co-relation 14429. Up to 1073 conditions per place. [2023-08-04 04:34:29,978 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 204 selfloop transitions, 103 changer transitions 0/318 dead transitions. [2023-08-04 04:34:29,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 318 transitions, 2116 flow [2023-08-04 04:34:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-04 04:34:29,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-04 04:34:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2624 transitions. [2023-08-04 04:34:29,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832412523020258 [2023-08-04 04:34:29,986 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2624 transitions. [2023-08-04 04:34:29,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2624 transitions. [2023-08-04 04:34:29,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:29,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2624 transitions. [2023-08-04 04:34:29,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 87.46666666666667) internal successors, (2624), 30 states have internal predecessors, (2624), 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 04:34:30,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 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 04:34:30,002 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 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 04:34:30,003 INFO L175 Difference]: Start difference. First operand has 56 places, 73 transitions, 473 flow. Second operand 30 states and 2624 transitions. [2023-08-04 04:34:30,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 318 transitions, 2116 flow [2023-08-04 04:34:30,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 318 transitions, 2106 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-04 04:34:30,039 INFO L231 Difference]: Finished difference. Result has 94 places, 146 transitions, 1349 flow [2023-08-04 04:34:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1349, PETRI_PLACES=94, PETRI_TRANSITIONS=146} [2023-08-04 04:34:30,040 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2023-08-04 04:34:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 146 transitions, 1349 flow [2023-08-04 04:34:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 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 04:34:30,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:30,041 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:30,052 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 04:34:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:30,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:30,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1284126657, now seen corresponding path program 1 times [2023-08-04 04:34:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348043346] [2023-08-04 04:34:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:30,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:30,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348043346] [2023-08-04 04:34:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348043346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887482484] [2023-08-04 04:34:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:30,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:30,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:30,523 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 04:34:30,529 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 04:34:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:30,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-04 04:34:30,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:30,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887482484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:30,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:30,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-08-04 04:34:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968941018] [2023-08-04 04:34:30,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:30,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 04:34:30,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:30,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 04:34:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-08-04 04:34:30,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-04 04:34:30,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 146 transitions, 1349 flow. Second operand has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 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 04:34:30,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:30,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-04 04:34:30,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:33,203 INFO L124 PetriNetUnfolderBase]: 5912/10230 cut-off events. [2023-08-04 04:34:33,204 INFO L125 PetriNetUnfolderBase]: For 32981/33121 co-relation queries the response was YES. [2023-08-04 04:34:33,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38033 conditions, 10230 events. 5912/10230 cut-off events. For 32981/33121 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 55057 event pairs, 416 based on Foata normal form. 244/9571 useless extension candidates. Maximal degree in co-relation 36437. Up to 2285 conditions per place. [2023-08-04 04:34:33,295 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 390 selfloop transitions, 293 changer transitions 0/694 dead transitions. [2023-08-04 04:34:33,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 694 transitions, 5876 flow [2023-08-04 04:34:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-04 04:34:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-04 04:34:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5455 transitions. [2023-08-04 04:34:33,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783828816977988 [2023-08-04 04:34:33,310 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5455 transitions. [2023-08-04 04:34:33,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5455 transitions. [2023-08-04 04:34:33,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:33,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5455 transitions. [2023-08-04 04:34:33,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 86.58730158730158) internal successors, (5455), 63 states have internal predecessors, (5455), 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 04:34:33,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 181.0) internal successors, (11584), 64 states have internal predecessors, (11584), 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 04:34:33,344 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 181.0) internal successors, (11584), 64 states have internal predecessors, (11584), 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 04:34:33,344 INFO L175 Difference]: Start difference. First operand has 94 places, 146 transitions, 1349 flow. Second operand 63 states and 5455 transitions. [2023-08-04 04:34:33,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 694 transitions, 5876 flow [2023-08-04 04:34:33,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 694 transitions, 5383 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-04 04:34:33,551 INFO L231 Difference]: Finished difference. Result has 160 places, 347 transitions, 3777 flow [2023-08-04 04:34:33,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=3777, PETRI_PLACES=160, PETRI_TRANSITIONS=347} [2023-08-04 04:34:33,552 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 124 predicate places. [2023-08-04 04:34:33,552 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 347 transitions, 3777 flow [2023-08-04 04:34:33,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.3) internal successors, (1626), 20 states have internal predecessors, (1626), 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 04:34:33,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:33,553 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:33,567 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 04:34:33,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-04 04:34:33,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:33,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2035885509, now seen corresponding path program 1 times [2023-08-04 04:34:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:33,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116340787] [2023-08-04 04:34:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116340787] [2023-08-04 04:34:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116340787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570782696] [2023-08-04 04:34:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:34,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:34,257 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 04:34:34,260 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 04:34:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:34,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 04:34:34,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:34,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:34,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570782696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:34,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:34,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-08-04 04:34:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130733406] [2023-08-04 04:34:34,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:34,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 04:34:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:34,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 04:34:34,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-08-04 04:34:34,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 181 [2023-08-04 04:34:34,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 347 transitions, 3777 flow. Second operand has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 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 04:34:34,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:34,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 181 [2023-08-04 04:34:34,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:40,252 INFO L124 PetriNetUnfolderBase]: 11001/18959 cut-off events. [2023-08-04 04:34:40,252 INFO L125 PetriNetUnfolderBase]: For 79993/80273 co-relation queries the response was YES. [2023-08-04 04:34:40,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77041 conditions, 18959 events. 11001/18959 cut-off events. For 79993/80273 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 103860 event pairs, 640 based on Foata normal form. 496/17765 useless extension candidates. Maximal degree in co-relation 75393. Up to 4245 conditions per place. [2023-08-04 04:34:40,412 INFO L140 encePairwiseOnDemand]: 166/181 looper letters, 751 selfloop transitions, 637 changer transitions 0/1399 dead transitions. [2023-08-04 04:34:40,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1399 transitions, 12776 flow [2023-08-04 04:34:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-04 04:34:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-04 04:34:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 11356 transitions. [2023-08-04 04:34:40,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530554160388416 [2023-08-04 04:34:40,436 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 11356 transitions. [2023-08-04 04:34:40,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 11356 transitions. [2023-08-04 04:34:40,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:40,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 11356 transitions. [2023-08-04 04:34:40,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 86.03030303030303) internal successors, (11356), 132 states have internal predecessors, (11356), 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 04:34:40,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 181.0) internal successors, (24073), 133 states have internal predecessors, (24073), 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 04:34:40,518 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 181.0) internal successors, (24073), 133 states have internal predecessors, (24073), 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 04:34:40,519 INFO L175 Difference]: Start difference. First operand has 160 places, 347 transitions, 3777 flow. Second operand 132 states and 11356 transitions. [2023-08-04 04:34:40,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1399 transitions, 12776 flow [2023-08-04 04:34:40,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1399 transitions, 10700 flow, removed 374 selfloop flow, removed 9 redundant places. [2023-08-04 04:34:40,903 INFO L231 Difference]: Finished difference. Result has 298 places, 693 transitions, 7335 flow [2023-08-04 04:34:40,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=7335, PETRI_PLACES=298, PETRI_TRANSITIONS=693} [2023-08-04 04:34:40,904 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 262 predicate places. [2023-08-04 04:34:40,904 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 693 transitions, 7335 flow [2023-08-04 04:34:40,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.55555555555556) internal successors, (2936), 36 states have internal predecessors, (2936), 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 04:34:40,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:40,906 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:34:40,915 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 04:34:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:41,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:34:41,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1686738853, now seen corresponding path program 2 times [2023-08-04 04:34:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:41,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156765356] [2023-08-04 04:34:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:41,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 109 proven. 463 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:34:42,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156765356] [2023-08-04 04:34:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156765356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011620518] [2023-08-04 04:34:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 04:34:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:42,430 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 04:34:42,433 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 04:34:42,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 04:34:42,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 04:34:42,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 04:34:42,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:42,731 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 04:34:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:34:42,772 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 04:34:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-04 04:34:42,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:34:42,859 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#B~0.base| v_ArrVal_625) |c_~#A~0.base|) |c_~#A~0.offset|) 0))) is different from false [2023-08-04 04:34:42,870 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:34:42,870 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 04:34:42,876 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 04:34:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-08-04 04:34:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011620518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:34:42,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:34:42,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 41 [2023-08-04 04:34:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978805250] [2023-08-04 04:34:42,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:34:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-04 04:34:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-04 04:34:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1286, Unknown=1, NotChecked=76, Total=1640 [2023-08-04 04:34:42,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 181 [2023-08-04 04:34:42,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 693 transitions, 7335 flow. Second operand has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 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 04:34:42,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:42,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 181 [2023-08-04 04:34:42,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:43,569 INFO L124 PetriNetUnfolderBase]: 542/974 cut-off events. [2023-08-04 04:34:43,569 INFO L125 PetriNetUnfolderBase]: For 979/979 co-relation queries the response was YES. [2023-08-04 04:34:43,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 974 events. 542/974 cut-off events. For 979/979 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4428 event pairs, 0 based on Foata normal form. 56/923 useless extension candidates. Maximal degree in co-relation 3227. Up to 326 conditions per place. [2023-08-04 04:34:43,575 INFO L140 encePairwiseOnDemand]: 170/181 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-04 04:34:43,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 93 transitions, 565 flow [2023-08-04 04:34:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 04:34:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 04:34:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 768 transitions. [2023-08-04 04:34:43,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35359116022099446 [2023-08-04 04:34:43,579 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 768 transitions. [2023-08-04 04:34:43,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 768 transitions. [2023-08-04 04:34:43,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:43,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 768 transitions. [2023-08-04 04:34:43,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 64.0) internal successors, (768), 12 states have internal predecessors, (768), 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 04:34:43,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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 04:34:43,588 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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 04:34:43,588 INFO L175 Difference]: Start difference. First operand has 298 places, 693 transitions, 7335 flow. Second operand 12 states and 768 transitions. [2023-08-04 04:34:43,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 93 transitions, 565 flow [2023-08-04 04:34:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 463 flow, removed 4 selfloop flow, removed 25 redundant places. [2023-08-04 04:34:43,592 INFO L231 Difference]: Finished difference. Result has 80 places, 0 transitions, 0 flow [2023-08-04 04:34:43,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=80, PETRI_TRANSITIONS=0} [2023-08-04 04:34:43,593 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2023-08-04 04:34:43,593 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 0 transitions, 0 flow [2023-08-04 04:34:43,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.0) internal successors, (2501), 41 states have internal predecessors, (2501), 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 04:34:43,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 04:34:43,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 04:34:43,594 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 04:34:43,603 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 04:34:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:43,801 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-04 04:34:43,802 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 04:34:43,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,812 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-04 04:34:43,812 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:43,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-04 04:34:43,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:34:43,813 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,814 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 102 transitions, 216 flow [2023-08-04 04:34:43,823 INFO L124 PetriNetUnfolderBase]: 11/129 cut-off events. [2023-08-04 04:34:43,823 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:43,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 11/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-04 04:34:43,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 3348 [2023-08-04 04:34:45,928 INFO L134 LiptonReduction]: Checked pairs total: 8160 [2023-08-04 04:34:45,928 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 04:34:45,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:34:45,929 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;@aa6bb4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:34:45,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:34:45,933 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:34:45,933 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 04:34:45,933 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:34:45,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:34:45,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 04:34:45,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:34:45,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:34:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1065781716, now seen corresponding path program 1 times [2023-08-04 04:34:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:34:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805374215] [2023-08-04 04:34:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:34:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:45,992 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 04:34:45,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:34:45,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805374215] [2023-08-04 04:34:45,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805374215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:34:45,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674231082] [2023-08-04 04:34:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:34:45,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:34:45,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:34:45,997 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 04:34:46,032 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 04:34:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:34:46,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 04:34:46,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:34:46,105 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 04:34:46,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:34:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674231082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:34:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:34:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 04:34:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560291154] [2023-08-04 04:34:46,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:34:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:34:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:34:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:34:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:34:46,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 181 [2023-08-04 04:34:46,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 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 04:34:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:34:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 181 [2023-08-04 04:34:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:34:46,196 INFO L124 PetriNetUnfolderBase]: 289/523 cut-off events. [2023-08-04 04:34:46,196 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 04:34:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 523 events. 289/523 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2427 event pairs, 26 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 158. Up to 324 conditions per place. [2023-08-04 04:34:46,197 INFO L140 encePairwiseOnDemand]: 175/181 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-04 04:34:46,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 196 flow [2023-08-04 04:34:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:34:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:34:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 476 transitions. [2023-08-04 04:34:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259668508287293 [2023-08-04 04:34:46,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 476 transitions. [2023-08-04 04:34:46,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 476 transitions. [2023-08-04 04:34:46,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:34:46,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 476 transitions. [2023-08-04 04:34:46,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 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 04:34:46,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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 04:34:46,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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 04:34:46,203 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 82 flow. Second operand 5 states and 476 transitions. [2023-08-04 04:34:46,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 196 flow [2023-08-04 04:34:46,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:34:46,204 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-04 04:34:46,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-04 04:34:46,205 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-04 04:34:46,205 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-04 04:34:46,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.6) internal successors, (438), 5 states have internal predecessors, (438), 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 04:34:46,205 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:34:46,213 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 04:34:46,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 04:34:46,411 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:34:46,411 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 04:34:46,411 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 04:34:46,411 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 04:34:46,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 04:34:46 BasicIcfg [2023-08-04 04:34:46,417 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 04:34:46,417 INFO L158 Benchmark]: Toolchain (without parser) took 28237.80ms. Allocated memory was 341.8MB in the beginning and 1.7GB in the end (delta: 1.4GB). Free memory was 280.8MB in the beginning and 1.2GB in the end (delta: -898.2MB). Peak memory consumption was 460.8MB. Max. memory is 16.0GB. [2023-08-04 04:34:46,417 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 341.8MB. Free memory is still 293.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:34:46,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.77ms. Allocated memory is still 341.8MB. Free memory was 279.8MB in the beginning and 260.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 04:34:46,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.44ms. Allocated memory is still 341.8MB. Free memory was 260.9MB in the beginning and 258.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:34:46,418 INFO L158 Benchmark]: Boogie Preprocessor took 20.43ms. Allocated memory is still 341.8MB. Free memory was 258.8MB in the beginning and 257.9MB in the end (delta: 946.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:34:46,418 INFO L158 Benchmark]: RCFGBuilder took 289.27ms. Allocated memory is still 341.8MB. Free memory was 257.9MB in the beginning and 244.2MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 04:34:46,419 INFO L158 Benchmark]: TraceAbstraction took 27510.25ms. Allocated memory was 341.8MB in the beginning and 1.7GB in the end (delta: 1.4GB). Free memory was 243.2MB in the beginning and 1.2GB in the end (delta: -935.7MB). Peak memory consumption was 423.0MB. Max. memory is 16.0GB. [2023-08-04 04:34:46,420 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 341.8MB. Free memory is still 293.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 378.77ms. Allocated memory is still 341.8MB. Free memory was 279.8MB in the beginning and 260.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.44ms. Allocated memory is still 341.8MB. Free memory was 260.9MB in the beginning and 258.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.43ms. Allocated memory is still 341.8MB. Free memory was 258.8MB in the beginning and 257.9MB in the end (delta: 946.7kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 289.27ms. Allocated memory is still 341.8MB. Free memory was 257.9MB in the beginning and 244.2MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 27510.25ms. Allocated memory was 341.8MB in the beginning and 1.7GB in the end (delta: 1.4GB). Free memory was 243.2MB in the beginning and 1.2GB in the end (delta: -935.7MB). Peak memory consumption was 423.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 72 PlacesBefore, 12 PlacesAfterwards, 74 TransitionsBefore, 10 TransitionsAfterwards, 918 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 675 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 675, independent: 675, independent conditional: 0, independent unconditional: 675, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 469, independent: 469, independent conditional: 0, independent unconditional: 469, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 675, independent: 206, independent conditional: 0, independent unconditional: 206, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 469, unknown conditional: 0, unknown unconditional: 469] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 72 PlacesBefore, 12 PlacesAfterwards, 74 TransitionsBefore, 10 TransitionsAfterwards, 918 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 74 TotalNumberOfCompositions, 683 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 683, independent: 683, independent conditional: 0, independent unconditional: 683, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 469, independent: 469, independent conditional: 0, independent unconditional: 469, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 683, independent: 214, independent conditional: 0, independent unconditional: 214, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 469, unknown conditional: 0, unknown unconditional: 469] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 98 PlacesBefore, 36 PlacesAfterwards, 102 TransitionsBefore, 35 TransitionsAfterwards, 3348 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 79 TotalNumberOfCompositions, 7943 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5161, independent: 4913, independent conditional: 0, independent unconditional: 4913, dependent: 248, dependent conditional: 0, dependent unconditional: 248, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1769, independent: 1729, independent conditional: 0, independent unconditional: 1729, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5161, independent: 3184, independent conditional: 0, independent unconditional: 3184, dependent: 208, dependent conditional: 0, dependent unconditional: 208, unknown: 1769, unknown conditional: 0, unknown unconditional: 1769] , Statistics on independence cache: Total cache size (in pairs): 217, Positive cache size: 195, Positive conditional cache size: 0, Positive unconditional cache size: 195, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 98 PlacesBefore, 36 PlacesAfterwards, 102 TransitionsBefore, 35 TransitionsAfterwards, 3348 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 5 ChoiceCompositions, 79 TotalNumberOfCompositions, 8160 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3930, independent: 3678, independent conditional: 0, independent unconditional: 3678, dependent: 252, dependent conditional: 0, dependent unconditional: 252, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1698, independent: 1661, independent conditional: 0, independent unconditional: 1661, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3930, independent: 2017, independent conditional: 0, independent unconditional: 2017, dependent: 215, dependent conditional: 0, dependent unconditional: 215, unknown: 1698, unknown conditional: 0, unknown unconditional: 1698] , Statistics on independence cache: Total cache size (in pairs): 169, Positive cache size: 148, Positive conditional cache size: 0, Positive unconditional cache size: 148, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: 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, 94 locations, 3 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: 3.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 2, 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, 0.1s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 with 2 thread instances CFG has 4 procedures, 118 locations, 4 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: 18.8s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2779 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2658 mSDsluCounter, 417 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 115 IncrementalHoareTripleChecker+Unchecked, 399 mSDsCounter, 132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3774 IncrementalHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 132 mSolverCounterUnsat, 18 mSDtfsCounter, 3774 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1144 GetRequests, 840 SyntacticMatches, 3 SemanticMatches, 301 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10017 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7335occurred in iteration=7, InterpolantAutomatonStates: 256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 763 NumberOfCodeBlocks, 763 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1089 ConstructedInterpolants, 1 QuantifiedInterpolants, 2284 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1690 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 1593/2370 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, 94 locations, 3 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: 2.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 118 locations, 4 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: 2.6s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 86 IncrementalHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 86 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=82occurred 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, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 130 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 04:34:46,446 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...