/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 04:00:19,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 04:00:19,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 04:00:19,472 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 04:00:19,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 04:00:19,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 04:00:19,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 04:00:19,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 04:00:19,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 04:00:19,512 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 04:00:19,513 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 04:00:19,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 04:00:19,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 04:00:19,514 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 04:00:19,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 04:00:19,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 04:00:19,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 04:00:19,514 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 04:00:19,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 04:00:19,515 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 04:00:19,515 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 04:00:19,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 04:00:19,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 04:00:19,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 04:00:19,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 04:00:19,518 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 04:00:19,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 04:00:19,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 04:00:19,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 04:00:19,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 04:00:19,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 04:00:19,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 04:00:19,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 04:00:19,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 04:00:19,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 04:00:19,521 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 04:00:19,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 04:00:19,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 04:00:19,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 04:00:19,875 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 04:00:19,875 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 04:00:19,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2023-08-27 04:00:21,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 04:00:21,362 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 04:00:21,363 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2023-08-27 04:00:21,383 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d0055665/e15990923dcc4b459e38044d1938fb60/FLAG7343483a4 [2023-08-27 04:00:21,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d0055665/e15990923dcc4b459e38044d1938fb60 [2023-08-27 04:00:21,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 04:00:21,404 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 04:00:21,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 04:00:21,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 04:00:21,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 04:00:21,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:00:21" (1/1) ... [2023-08-27 04:00:21,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed4c775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:21, skipping insertion in model container [2023-08-27 04:00:21,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:00:21" (1/1) ... [2023-08-27 04:00:21,475 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 04:00:22,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 04:00:22,161 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 04:00:22,173 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [126] [2023-08-27 04:00:22,197 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [572] [2023-08-27 04:00:22,198 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [573] [2023-08-27 04:00:22,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 04:00:22,371 WARN L669 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 04:00:22,376 INFO L206 MainTranslator]: Completed translation [2023-08-27 04:00:22,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22 WrapperNode [2023-08-27 04:00:22,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 04:00:22,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 04:00:22,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 04:00:22,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 04:00:22,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,465 INFO L138 Inliner]: procedures = 428, calls = 127, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 480 [2023-08-27 04:00:22,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 04:00:22,466 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 04:00:22,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 04:00:22,466 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 04:00:22,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 04:00:22,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 04:00:22,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 04:00:22,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 04:00:22,511 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (1/1) ... [2023-08-27 04:00:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 04:00:22,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:00:22,539 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) [2023-08-27 04:00:22,591 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 [2023-08-27 04:00:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2023-08-27 04:00:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2023-08-27 04:00:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 04:00:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 04:00:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 04:00:22,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 04:00:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 04:00:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-27 04:00:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2023-08-27 04:00:22,606 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2023-08-27 04:00:22,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 04:00:22,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 04:00:22,608 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 04:00:22,778 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 04:00:22,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 04:00:23,411 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 04:00:23,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 04:00:23,425 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-27 04:00:23,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:00:23 BoogieIcfgContainer [2023-08-27 04:00:23,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 04:00:23,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 04:00:23,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 04:00:23,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 04:00:23,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:00:21" (1/3) ... [2023-08-27 04:00:23,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f61453f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:00:23, skipping insertion in model container [2023-08-27 04:00:23,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:00:22" (2/3) ... [2023-08-27 04:00:23,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f61453f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:00:23, skipping insertion in model container [2023-08-27 04:00:23,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:00:23" (3/3) ... [2023-08-27 04:00:23,436 INFO L112 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2023-08-27 04:00:23,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 04:00:23,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-27 04:00:23,454 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 04:00:23,618 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 04:00:23,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,036 INFO L124 PetriNetUnfolderBase]: 111/1114 cut-off events. [2023-08-27 04:00:24,036 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-27 04:00:24,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1114 events. 111/1114 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6816 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 586. Up to 16 conditions per place. [2023-08-27 04:00:24,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:00:24,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 462 places, 507 transitions, 1036 flow [2023-08-27 04:00:24,306 INFO L124 PetriNetUnfolderBase]: 111/1114 cut-off events. [2023-08-27 04:00:24,306 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-27 04:00:24,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 1114 events. 111/1114 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6816 event pairs, 0 based on Foata normal form. 0/947 useless extension candidates. Maximal degree in co-relation 586. Up to 16 conditions per place. [2023-08-27 04:00:24,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 123650 [2023-08-27 04:01:01,827 WARN L234 SmtUtils]: Spent 22.63s on a formula simplification. DAG size of input: 189 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:01:14,131 WARN L234 SmtUtils]: Spent 12.30s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:01:44,438 WARN L234 SmtUtils]: Spent 30.30s on a formula simplification. DAG size of input: 189 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:01:58,234 WARN L234 SmtUtils]: Spent 13.79s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:03:04,072 WARN L234 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 309 DAG size of output: 274 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:03:37,664 WARN L234 SmtUtils]: Spent 33.59s on a formula simplification that was a NOOP. DAG size: 263 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:04:52,921 WARN L234 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 322 DAG size of output: 278 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:05:27,875 WARN L234 SmtUtils]: Spent 34.95s on a formula simplification that was a NOOP. DAG size: 266 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:05:27,900 INFO L134 LiptonReduction]: Checked pairs total: 293197 [2023-08-27 04:05:27,900 INFO L136 LiptonReduction]: Total number of compositions: 502 [2023-08-27 04:05:27,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 04:05:27,914 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=false, 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;@c37265c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:05:27,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 04:05:27,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:05:27,923 INFO L124 PetriNetUnfolderBase]: 8/66 cut-off events. [2023-08-27 04:05:27,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 04:05:27,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:05:27,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-08-27 04:05:27,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:05:27,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:05:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2089059128, now seen corresponding path program 1 times [2023-08-27 04:05:27,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:05:27,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595977979] [2023-08-27 04:05:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:05:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:05:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:05:28,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 04:05:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 04:05:28,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 04:05:28,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 04:05:28,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-27 04:05:28,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-27 04:05:28,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 04:05:28,297 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 04:05:28,301 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-27 04:05:28,302 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 04:05:28,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 04:05:28,408 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-27 04:05:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:29,555 INFO L124 PetriNetUnfolderBase]: 390/3684 cut-off events. [2023-08-27 04:05:29,555 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-27 04:05:29,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 3684 events. 390/3684 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 29902 event pairs, 2 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 2050. Up to 64 conditions per place. [2023-08-27 04:05:29,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:29,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:29,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 04:05:29,661 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:29,661 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:29,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 700 places, 771 transitions, 1590 flow [2023-08-27 04:05:30,626 INFO L124 PetriNetUnfolderBase]: 390/3684 cut-off events. [2023-08-27 04:05:30,626 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-27 04:05:30,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 3684 events. 390/3684 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 29902 event pairs, 2 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 2050. Up to 64 conditions per place. [2023-08-27 04:05:31,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 385556 [2023-08-27 04:06:25,838 WARN L234 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 215 DAG size of output: 210 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:06:30,864 WARN L234 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 206 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:06:43,404 WARN L234 SmtUtils]: Spent 12.54s on a formula simplification. DAG size of input: 215 DAG size of output: 210 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:06:49,192 WARN L234 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 206 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:07:42,770 WARN L234 SmtUtils]: Spent 53.57s on a formula simplification. DAG size of input: 286 DAG size of output: 272 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:08:14,794 WARN L234 SmtUtils]: Spent 32.02s on a formula simplification that was a NOOP. DAG size: 263 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:09:23,767 WARN L234 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 290 DAG size of output: 277 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:09:57,808 WARN L234 SmtUtils]: Spent 34.04s on a formula simplification that was a NOOP. DAG size: 266 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-27 04:09:57,821 INFO L134 LiptonReduction]: Checked pairs total: 942885 [2023-08-27 04:09:57,821 INFO L136 LiptonReduction]: Total number of compositions: 748 [2023-08-27 04:09:57,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 04:09:57,824 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=false, 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;@c37265c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 04:09:57,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-27 04:09:57,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 04:09:57,843 INFO L124 PetriNetUnfolderBase]: 31/250 cut-off events. [2023-08-27 04:09:57,844 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 04:09:57,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 04:09:57,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-08-27 04:09:57,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 04:09:57,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 04:09:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1590936613, now seen corresponding path program 1 times [2023-08-27 04:09:57,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 04:09:57,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596254018] [2023-08-27 04:09:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:09:57,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 04:09:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:09:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 04:09:58,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 04:09:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596254018] [2023-08-27 04:09:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596254018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 04:09:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280932443] [2023-08-27 04:09:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 04:09:58,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 04:09:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 04:09:58,081 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) [2023-08-27 04:09:58,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 04:09:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 04:09:58,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 04:09:58,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 04:09:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 04:09:58,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 04:09:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280932443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 04:09:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 04:09:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-27 04:09:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866454775] [2023-08-27 04:09:58,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 04:09:58,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 04:09:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 04:09:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 04:09:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 04:09:58,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 708 out of 1519 [2023-08-27 04:09:58,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 250 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 710.8) internal successors, (3554), 5 states have internal predecessors, (3554), 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) [2023-08-27 04:09:58,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 04:09:58,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 708 of 1519 [2023-08-27 04:09:58,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand