/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/pthread_queue_longer_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:34:49,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:34:49,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:34:49,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:34:49,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:34:49,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:34:49,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:34:49,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:34:49,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:34:49,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:34:49,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:34:49,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:34:49,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:34:49,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:34:49,419 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:34:49,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:34:49,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:34:49,420 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:34:49,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:34:49,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:34:49,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:34:49,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:34:49,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:34:49,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:34:49,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:34:49,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:34:49,423 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:34:49,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:34:49,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:34:49,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:34:49,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:34:49,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:34:49,425 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:34:49,426 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:34:49,426 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:34:49,426 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:34:49,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:34:49,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:34:49,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:34:49,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:34:49,692 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:34:49,692 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:34:49,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i [2023-08-04 01:34:50,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:34:51,114 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:34:51,115 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i [2023-08-04 01:34:51,146 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a23acce4/0bacdd00090f496b9414cade00a5cf1d/FLAG49d49010d [2023-08-04 01:34:51,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a23acce4/0bacdd00090f496b9414cade00a5cf1d [2023-08-04 01:34:51,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:34:51,162 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:34:51,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:34:51,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:34:51,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:34:51,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3f4cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51, skipping insertion in model container [2023-08-04 01:34:51,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,231 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:34:51,599 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43296,43309] [2023-08-04 01:34:51,606 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43503,43516] [2023-08-04 01:34:51,612 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43789,43802] [2023-08-04 01:34:51,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:34:51,630 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:34:51,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 01:34:51,652 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 01:34:51,659 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-04 01:34:51,671 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43296,43309] [2023-08-04 01:34:51,673 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43503,43516] [2023-08-04 01:34:51,676 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longer_bound2.i[43789,43802] [2023-08-04 01:34:51,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:34:51,722 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:34:51,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51 WrapperNode [2023-08-04 01:34:51,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:34:51,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:34:51,724 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:34:51,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:34:51,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,772 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 275 [2023-08-04 01:34:51,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:34:51,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:34:51,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:34:51,773 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:34:51,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:34:51,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:34:51,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:34:51,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:34:51,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (1/1) ... [2023-08-04 01:34:51,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:34:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:34:51,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:34:51,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 01:34:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:34:51,875 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:34:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:34:51,875 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:34:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:34:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:34:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:34:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:34:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 01:34:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:34:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:34:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:34:51,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:34:51,877 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:34:51,999 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:34:52,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:34:52,382 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:34:52,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:34:52,392 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 01:34:52,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:34:52 BoogieIcfgContainer [2023-08-04 01:34:52,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:34:52,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:34:52,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:34:52,405 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:34:52,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:34:51" (1/3) ... [2023-08-04 01:34:52,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd12fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:34:52, skipping insertion in model container [2023-08-04 01:34:52,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:34:51" (2/3) ... [2023-08-04 01:34:52,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd12fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:34:52, skipping insertion in model container [2023-08-04 01:34:52,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:34:52" (3/3) ... [2023-08-04 01:34:52,411 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_queue_longer_bound2.i [2023-08-04 01:34:52,421 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:34:52,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:34:52,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-04 01:34:52,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:34:52,552 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 01:34:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 01:34:52,764 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-04 01:34:52,764 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 01:34:52,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 01:34:52,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 01:34:52,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 287 transitions, 596 flow [2023-08-04 01:34:52,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:34:52,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 287 transitions, 596 flow [2023-08-04 01:34:52,821 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 287 transitions, 596 flow [2023-08-04 01:34:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 287 transitions, 596 flow [2023-08-04 01:34:52,888 INFO L124 PetriNetUnfolderBase]: 42/447 cut-off events. [2023-08-04 01:34:52,888 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 01:34:52,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 447 events. 42/447 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1539 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 01:34:52,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 29746 [2023-08-04 01:34:59,880 INFO L134 LiptonReduction]: Checked pairs total: 64481 [2023-08-04 01:34:59,880 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-08-04 01:34:59,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:34:59,899 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;@626c6447, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:34:59,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:34:59,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:34:59,905 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2023-08-04 01:34:59,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:34:59,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:34:59,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:34:59,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:34:59,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:34:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1170791099, now seen corresponding path program 1 times [2023-08-04 01:34:59,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:34:59,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077709547] [2023-08-04 01:34:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:34:59,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:35:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:35:00,047 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:35:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:35:00,099 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:35:00,100 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:35:00,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:35:00,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:35:00,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:35:00,104 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:35:00,106 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:35:00,107 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:35:00,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:35:00,180 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 01:35:00,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 466 transitions, 980 flow [2023-08-04 01:35:00,533 INFO L124 PetriNetUnfolderBase]: 149/1208 cut-off events. [2023-08-04 01:35:00,533 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-04 01:35:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 149/1208 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7304 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 784. Up to 32 conditions per place. [2023-08-04 01:35:00,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 435 places, 466 transitions, 980 flow [2023-08-04 01:35:00,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 434 places, 465 transitions, 978 flow [2023-08-04 01:35:00,581 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:35:00,581 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 434 places, 465 transitions, 978 flow [2023-08-04 01:35:00,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 434 places, 465 transitions, 978 flow [2023-08-04 01:35:00,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 434 places, 465 transitions, 978 flow [2023-08-04 01:35:00,833 INFO L124 PetriNetUnfolderBase]: 149/1207 cut-off events. [2023-08-04 01:35:00,833 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-04 01:35:00,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 1207 events. 149/1207 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7317 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 783. Up to 32 conditions per place. [2023-08-04 01:35:00,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 122216 [2023-08-04 01:35:10,156 INFO L134 LiptonReduction]: Checked pairs total: 269043 [2023-08-04 01:35:10,156 INFO L136 LiptonReduction]: Total number of compositions: 379 [2023-08-04 01:35:10,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:35:10,160 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;@626c6447, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:35:10,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:35:10,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:35:10,167 INFO L124 PetriNetUnfolderBase]: 2/81 cut-off events. [2023-08-04 01:35:10,167 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 01:35:10,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:35:10,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:35:10,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:35:10,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:35:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1724291040, now seen corresponding path program 1 times [2023-08-04 01:35:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:35:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388655069] [2023-08-04 01:35:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:35:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:35:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:35:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:35:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:35:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388655069] [2023-08-04 01:35:10,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388655069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:35:10,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596167944] [2023-08-04 01:35:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:35:10,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:35:10,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:35:10,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:35:10,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:35:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:35:10,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:35:10,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:35:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:35:10,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:35:10,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596167944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:35:10,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:35:10,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:35:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693374234] [2023-08-04 01:35:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:35:10,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:35:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:35:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:35:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:35:10,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 845 [2023-08-04 01:35:10,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 431.6) internal successors, (2158), 5 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:35:10,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:35:10,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 845 [2023-08-04 01:35:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand