/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:10:28,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:10:28,411 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:10:28,418 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:10:28,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:10:28,419 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:10:28,419 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:10:28,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:10:28,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:10:28,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:10:28,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:10:28,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:10:28,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:10:28,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:10:28,455 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:10:28,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:10:28,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:10:28,456 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:10:28,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:10:28,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:10:28,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:10:28,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:10:28,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:10:28,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:10:28,458 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:10:28,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:10:28,459 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:10:28,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:10:28,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:10:28,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:10:28,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:10:28,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:10:28,462 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:10:28,463 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:10:28,463 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:10:28,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:10:28,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:10:28,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:10:28,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:10:28,714 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:10:28,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i [2023-08-03 22:10:29,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:10:29,994 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:10:29,995 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i [2023-08-03 22:10:30,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43b06d14/fe0690a54afd446cb3bf1dfc06affa7b/FLAGd81702f4c [2023-08-03 22:10:30,022 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43b06d14/fe0690a54afd446cb3bf1dfc06affa7b [2023-08-03 22:10:30,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:10:30,027 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:10:30,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:10:30,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:10:30,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:10:30,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@facc0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30, skipping insertion in model container [2023-08-03 22:10:30,036 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,082 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:10:30,210 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_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i[1098,1111] [2023-08-03 22:10:30,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:10:30,331 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:10:30,348 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_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i[1098,1111] [2023-08-03 22:10:30,365 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:10:30,367 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-03 22:10:30,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:10:30,432 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:10:30,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30 WrapperNode [2023-08-03 22:10:30,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:10:30,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:10:30,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:10:30,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:10:30,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,489 INFO L138 Inliner]: procedures = 163, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-08-03 22:10:30,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:10:30,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:10:30,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:10:30,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:10:30,496 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:10:30,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:10:30,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:10:30,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:10:30,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (1/1) ... [2023-08-03 22:10:30,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:10:30,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:10:30,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:10:30,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:10:30,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:10:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:10:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:10:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:10:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 22:10:30,600 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 22:10:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:10:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:10:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:10:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:10:30,604 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:10:30,758 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:10:30,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:10:30,940 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:10:30,946 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:10:30,946 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 22:10:30,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:10:30 BoogieIcfgContainer [2023-08-03 22:10:30,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:10:30,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:10:30,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:10:30,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:10:30,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:10:30" (1/3) ... [2023-08-03 22:10:30,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd778e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:10:30, skipping insertion in model container [2023-08-03 22:10:30,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:10:30" (2/3) ... [2023-08-03 22:10:30,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd778e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:10:30, skipping insertion in model container [2023-08-03 22:10:30,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:10:30" (3/3) ... [2023-08-03 22:10:30,956 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_36-apron_17-traces-rpb-litmus_unknown_1_pos_bound2.i [2023-08-03 22:10:30,963 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:10:30,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:10:30,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:10:30,971 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:10:31,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:10:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 80 transitions, 165 flow [2023-08-03 22:10:31,075 INFO L124 PetriNetUnfolderBase]: 6/112 cut-off events. [2023-08-03 22:10:31,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:10:31,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 112 events. 6/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-08-03 22:10:31,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 80 transitions, 165 flow [2023-08-03 22:10:31,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 52 transitions, 109 flow [2023-08-03 22:10:31,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:10:31,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 52 transitions, 109 flow [2023-08-03 22:10:31,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 52 transitions, 109 flow [2023-08-03 22:10:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 52 transitions, 109 flow [2023-08-03 22:10:31,112 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2023-08-03 22:10:31,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:10:31,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 56 events. 0/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-03 22:10:31,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 200 [2023-08-03 22:10:33,607 INFO L134 LiptonReduction]: Checked pairs total: 158 [2023-08-03 22:10:33,607 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-03 22:10:33,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:10:33,625 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;@9701d04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:10:33,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:10:33,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:10:33,628 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:10:33,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:10:33,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:33,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:10:33,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:10:33,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 8232703, now seen corresponding path program 1 times [2023-08-03 22:10:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:33,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82626606] [2023-08-03 22:10:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:10:33,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:10:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:10:33,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:10:33,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:10:33,834 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:10:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:10:33,836 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:10:33,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:10:33,839 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:10:33,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:10:33,854 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:10:33,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 194 flow [2023-08-03 22:10:33,887 INFO L124 PetriNetUnfolderBase]: 9/160 cut-off events. [2023-08-03 22:10:33,887 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:33,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 160 events. 9/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 334 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-03 22:10:33,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 194 flow [2023-08-03 22:10:33,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 63 transitions, 138 flow [2023-08-03 22:10:33,889 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:10:33,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 63 transitions, 138 flow [2023-08-03 22:10:33,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 63 transitions, 138 flow [2023-08-03 22:10:33,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 63 transitions, 138 flow [2023-08-03 22:10:33,903 INFO L124 PetriNetUnfolderBase]: 0/76 cut-off events. [2023-08-03 22:10:33,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:33,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 0/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-03 22:10:33,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 620 [2023-08-03 22:10:36,008 INFO L134 LiptonReduction]: Checked pairs total: 1556 [2023-08-03 22:10:36,008 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-03 22:10:36,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:10:36,011 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;@9701d04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:10:36,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:10:36,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:10:36,015 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:10:36,015 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:36,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:36,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:10:36,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:10:36,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1295226124, now seen corresponding path program 1 times [2023-08-03 22:10:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:36,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541122258] [2023-08-03 22:10:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:36,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541122258] [2023-08-03 22:10:36,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541122258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:36,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:36,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:10:36,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388783570] [2023-08-03 22:10:36,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:36,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:10:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:10:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:10:36,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 141 [2023-08-03 22:10:36,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:36,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:36,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 141 [2023-08-03 22:10:36,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:36,240 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2023-08-03 22:10:36,240 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:10:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 68 events. 20/68 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 20/87 useless extension candidates. Maximal degree in co-relation 34. Up to 45 conditions per place. [2023-08-03 22:10:36,242 INFO L140 encePairwiseOnDemand]: 139/141 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-03 22:10:36,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-03 22:10:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:10:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:10:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2023-08-03 22:10:36,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6099290780141844 [2023-08-03 22:10:36,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2023-08-03 22:10:36,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2023-08-03 22:10:36,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:36,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2023-08-03 22:10:36,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:36,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:36,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:36,267 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 4 states and 344 transitions. [2023-08-03 22:10:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-03 22:10:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:36,270 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-03 22:10:36,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-03 22:10:36,275 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-03 22:10:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-03 22:10:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:36,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:10:36,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:10:36,276 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:10:36,277 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:10:36,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 194 flow [2023-08-03 22:10:36,298 INFO L124 PetriNetUnfolderBase]: 9/160 cut-off events. [2023-08-03 22:10:36,298 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:10:36,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 160 events. 9/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 334 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-03 22:10:36,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 194 flow [2023-08-03 22:10:36,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 80 transitions, 168 flow [2023-08-03 22:10:36,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:10:36,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 80 transitions, 168 flow [2023-08-03 22:10:36,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 80 transitions, 168 flow [2023-08-03 22:10:36,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 168 flow [2023-08-03 22:10:36,314 INFO L124 PetriNetUnfolderBase]: 6/129 cut-off events. [2023-08-03 22:10:36,314 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:10:36,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 129 events. 6/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-08-03 22:10:36,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 1300 [2023-08-03 22:10:38,184 INFO L134 LiptonReduction]: Checked pairs total: 3548 [2023-08-03 22:10:38,184 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-03 22:10:38,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:10:38,188 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;@9701d04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:10:38,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:10:38,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:10:38,190 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-03 22:10:38,190 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:10:38,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:38,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:10:38,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:10:38,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 14839435, now seen corresponding path program 1 times [2023-08-03 22:10:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:38,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022189494] [2023-08-03 22:10:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022189494] [2023-08-03 22:10:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022189494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:10:38,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:10:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:10:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297966595] [2023-08-03 22:10:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:10:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:10:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:10:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:10:38,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 153 [2023-08-03 22:10:38,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:38,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 153 [2023-08-03 22:10:38,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:38,328 INFO L124 PetriNetUnfolderBase]: 286/590 cut-off events. [2023-08-03 22:10:38,328 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:10:38,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1099 conditions, 590 events. 286/590 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2918 event pairs, 105 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 196. Up to 482 conditions per place. [2023-08-03 22:10:38,332 INFO L140 encePairwiseOnDemand]: 150/153 looper letters, 22 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-03 22:10:38,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 114 flow [2023-08-03 22:10:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:10:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:10:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-03 22:10:38,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904139433551199 [2023-08-03 22:10:38,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-03 22:10:38,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-03 22:10:38,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:38,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-03 22:10:38,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,346 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,346 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 54 flow. Second operand 3 states and 271 transitions. [2023-08-03 22:10:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 114 flow [2023-08-03 22:10:38,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:10:38,348 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 66 flow [2023-08-03 22:10:38,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-03 22:10:38,349 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-03 22:10:38,349 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 66 flow [2023-08-03 22:10:38,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:38,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:10:38,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:10:38,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1129435999, now seen corresponding path program 1 times [2023-08-03 22:10:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582357080] [2023-08-03 22:10:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:38,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:10:38,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582357080] [2023-08-03 22:10:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582357080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:10:38,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454984810] [2023-08-03 22:10:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:10:38,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:10:38,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:10:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:10:38,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:10:38,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:10:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:38,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:10:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:10:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454984810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:10:38,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:10:38,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:10:38,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986886806] [2023-08-03 22:10:38,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:10:38,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:10:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:10:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:10:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:10:38,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 153 [2023-08-03 22:10:38,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:10:38,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 153 [2023-08-03 22:10:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:10:38,722 INFO L124 PetriNetUnfolderBase]: 261/485 cut-off events. [2023-08-03 22:10:38,723 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-03 22:10:38,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 485 events. 261/485 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2150 event pairs, 35 based on Foata normal form. 5/469 useless extension candidates. Maximal degree in co-relation 205. Up to 327 conditions per place. [2023-08-03 22:10:38,728 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 28 selfloop transitions, 3 changer transitions 1/37 dead transitions. [2023-08-03 22:10:38,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 156 flow [2023-08-03 22:10:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:10:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:10:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-03 22:10:38,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-03 22:10:38,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-03 22:10:38,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-03 22:10:38,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:10:38,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-03 22:10:38,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,735 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 153.0) internal successors, (765), 5 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,736 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 4 states and 357 transitions. [2023-08-03 22:10:38,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 156 flow [2023-08-03 22:10:38,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:10:38,741 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 78 flow [2023-08-03 22:10:38,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-03 22:10:38,748 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-03 22:10:38,748 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 78 flow [2023-08-03 22:10:38,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:10:38,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:10:38,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:10:38,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:10:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:10:38,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:10:38,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:10:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1154451154, now seen corresponding path program 1 times [2023-08-03 22:10:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:10:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371388788] [2023-08-03 22:10:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:10:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:10:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:10:38,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:10:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:10:38,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:10:38,994 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:10:38,995 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 22:10:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:10:38,995 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 22:10:39,001 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-03 22:10:39,003 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:10:39,003 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:10:39,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:10:39 BasicIcfg [2023-08-03 22:10:39,047 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:10:39,048 INFO L158 Benchmark]: Toolchain (without parser) took 9020.69ms. Allocated memory was 323.0MB in the beginning and 436.2MB in the end (delta: 113.2MB). Free memory was 272.4MB in the beginning and 280.9MB in the end (delta: -8.5MB). Peak memory consumption was 107.0MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,048 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 323.0MB. Free memory is still 276.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:10:39,048 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.53ms. Allocated memory is still 323.0MB. Free memory was 271.5MB in the beginning and 252.7MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,048 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.74ms. Allocated memory is still 323.0MB. Free memory was 252.7MB in the beginning and 250.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,049 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 323.0MB. Free memory was 250.5MB in the beginning and 249.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,049 INFO L158 Benchmark]: RCFGBuilder took 425.44ms. Allocated memory is still 323.0MB. Free memory was 249.5MB in the beginning and 234.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,049 INFO L158 Benchmark]: TraceAbstraction took 8096.21ms. Allocated memory was 323.0MB in the beginning and 436.2MB in the end (delta: 113.2MB). Free memory was 233.8MB in the beginning and 280.9MB in the end (delta: -47.1MB). Peak memory consumption was 69.2MB. Max. memory is 16.0GB. [2023-08-03 22:10:39,051 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 323.0MB. Free memory is still 276.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 404.53ms. Allocated memory is still 323.0MB. Free memory was 271.5MB in the beginning and 252.7MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.74ms. Allocated memory is still 323.0MB. Free memory was 252.7MB in the beginning and 250.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 323.0MB. Free memory was 250.5MB in the beginning and 249.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 425.44ms. Allocated memory is still 323.0MB. Free memory was 249.5MB in the beginning and 234.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 8096.21ms. Allocated memory was 323.0MB in the beginning and 436.2MB in the end (delta: 113.2MB). Free memory was 233.8MB in the beginning and 280.9MB in the end (delta: -47.1MB). Peak memory consumption was 69.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 55 PlacesBefore, 8 PlacesAfterwards, 52 TransitionsBefore, 5 TransitionsAfterwards, 200 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 50 TotalNumberOfCompositions, 158 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 158, independent: 158, independent conditional: 0, independent unconditional: 158, 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: 102, independent: 102, independent conditional: 0, independent unconditional: 102, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 158, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 102, unknown conditional: 0, unknown unconditional: 102] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, 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, 68 PlacesBefore, 21 PlacesAfterwards, 63 TransitionsBefore, 16 TransitionsAfterwards, 620 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 50 TotalNumberOfCompositions, 1556 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 790, independent: 690, independent conditional: 0, independent unconditional: 690, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 306, independent: 290, independent conditional: 0, independent unconditional: 290, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 790, independent: 400, independent conditional: 0, independent unconditional: 400, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 306, unknown conditional: 0, unknown unconditional: 306] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 83 PlacesBefore, 27 PlacesAfterwards, 80 TransitionsBefore, 23 TransitionsAfterwards, 1300 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 62 TotalNumberOfCompositions, 3548 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1348, independent: 1173, independent conditional: 0, independent unconditional: 1173, dependent: 175, dependent conditional: 0, dependent unconditional: 175, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 622, independent: 591, independent conditional: 0, independent unconditional: 591, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1348, independent: 582, independent conditional: 0, independent unconditional: 582, dependent: 144, dependent conditional: 0, dependent unconditional: 144, unknown: 622, unknown conditional: 0, unknown unconditional: 622] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 int g = 42; [L683] 0 pthread_mutex_t A = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L684] 0 pthread_mutex_t B = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L694] 0 int r = __VERIFIER_nondet_int(); [L695] 0 int t; [L696] 0 pthread_t id[2]; [L697] 0 int asdf=0; VAL [A={3:0}, B={4:0}, asdf=0, g=42, id={5:0}, r=0] [L697] COND TRUE 0 asdf<2 [L697] FCALL, FORK 0 pthread_create(&id[asdf], ((void *)0), t_fun, ((void *)0)) VAL [A={3:0}, B={4:0}, arg={0:0}, asdf=0, g=42, id={5:0}, pthread_create(&id[asdf], ((void *)0), t_fun, ((void *)0))=-1, r=0] [L697] 0 asdf++ VAL [A={3:0}, B={4:0}, arg={0:0}, asdf=1, g=42, id={5:0}, r=0] [L697] COND TRUE 0 asdf<2 [L697] FCALL, FORK 0 pthread_create(&id[asdf], ((void *)0), t_fun, ((void *)0)) VAL [A={3:0}, B={4:0}, arg={0:0}, asdf=1, g=42, id={5:0}, pthread_create(&id[asdf], ((void *)0), t_fun, ((void *)0))=0, r=0] [L697] 0 asdf++ VAL [A={3:0}, B={4:0}, arg={0:0}, asdf=2, g=42, id={5:0}, r=0] [L697] COND FALSE 0 !(asdf<2) [L700] COND FALSE 0 !(\read(r)) [L705] 0 t = g [L706] CALL 0 __VERIFIER_assert(t == 17) [L19] COND TRUE 0 !(cond) [L19] 0 reach_error() VAL [A={3:0}, B={4:0}, \old(cond)=0, arg={0:0}, cond=0, g=42] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 89 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 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, 100 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 25 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37 IncrementalHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 37 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, InterpolantAutomatonStates: 4, 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, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 100 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 115 IncrementalHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 115 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=2, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 22:10:39,081 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...