/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-wmm_mix020.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:22:02,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:22:02,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:22:02,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:22:02,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:22:02,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:22:02,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:22:02,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:22:02,629 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:22:02,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:22:02,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:22:02,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:22:02,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:22:02,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:22:02,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:22:02,636 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:22:02,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:22:02,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:22:02,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:22:02,637 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:22:02,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:22:02,638 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:22:02,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:22:02,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:22:02,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:22:02,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:22:02,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:22:02,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:22:02,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:22:02,639 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:22:02,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:22:02,640 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:22:02,640 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:22:02,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:22:02,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:22:02,640 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:22:02,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:22:02,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:22:02,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:22:02,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:22:02,811 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:22:02,811 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:22:02,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix020.opt_bound2.i [2023-08-03 23:22:03,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:22:04,036 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:22:04,036 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix020.opt_bound2.i [2023-08-03 23:22:04,057 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b9adafa/3bf4113952704f0c88debb589d8eab26/FLAG2732424a7 [2023-08-03 23:22:04,069 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b9adafa/3bf4113952704f0c88debb589d8eab26 [2023-08-03 23:22:04,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:22:04,071 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:22:04,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:22:04,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:22:04,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:22:04,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52436af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04, skipping insertion in model container [2023-08-03 23:22:04,077 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,124 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:22:04,228 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-wmm_mix020.opt_bound2.i[944,957] [2023-08-03 23:22:04,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:22:04,408 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:22:04,417 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-wmm_mix020.opt_bound2.i[944,957] [2023-08-03 23:22:04,432 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:22:04,433 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:22:04,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:22:04,497 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:22:04,497 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:22:04,502 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:22:04,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04 WrapperNode [2023-08-03 23:22:04,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:22:04,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:22:04,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:22:04,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:22:04,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,518 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,537 INFO L138 Inliner]: procedures = 177, calls = 69, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 197 [2023-08-03 23:22:04,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:22:04,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:22:04,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:22:04,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:22:04,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,558 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:22:04,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:22:04,563 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:22:04,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:22:04,564 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (1/1) ... [2023-08-03 23:22:04,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:22:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:22:04,591 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 23:22:04,593 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 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:22:04,621 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:22:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:22:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:22:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 23:22:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:22:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:22:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:22:04,623 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 23:22:04,757 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:22:04,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:22:05,045 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:22:05,152 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:22:05,152 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 23:22:05,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:22:05 BoogieIcfgContainer [2023-08-03 23:22:05,155 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:22:05,157 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:22:05,157 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:22:05,160 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:22:05,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:22:04" (1/3) ... [2023-08-03 23:22:05,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a0ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:22:05, skipping insertion in model container [2023-08-03 23:22:05,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:22:04" (2/3) ... [2023-08-03 23:22:05,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8a0ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:22:05, skipping insertion in model container [2023-08-03 23:22:05,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:22:05" (3/3) ... [2023-08-03 23:22:05,164 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix020.opt_bound2.i [2023-08-03 23:22:05,169 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:22:05,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:22:05,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:22:05,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:22:05,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:22:05,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 156 transitions, 332 flow [2023-08-03 23:22:05,481 INFO L124 PetriNetUnfolderBase]: 62/933 cut-off events. [2023-08-03 23:22:05,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:22:05,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 933 events. 62/933 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5806 event pairs, 0 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 546. Up to 32 conditions per place. [2023-08-03 23:22:05,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 156 transitions, 332 flow [2023-08-03 23:22:05,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 125 transitions, 270 flow [2023-08-03 23:22:05,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:22:05,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 125 transitions, 270 flow [2023-08-03 23:22:05,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 125 transitions, 270 flow [2023-08-03 23:22:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 125 transitions, 270 flow [2023-08-03 23:22:05,558 INFO L124 PetriNetUnfolderBase]: 14/437 cut-off events. [2023-08-03 23:22:05,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:22:05,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 437 events. 14/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2010 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 298. Up to 16 conditions per place. [2023-08-03 23:22:05,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-08-03 23:22:08,370 INFO L134 LiptonReduction]: Checked pairs total: 5110 [2023-08-03 23:22:08,370 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 23:22:08,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:22:08,384 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;@12741ed1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:22:08,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:22:08,387 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:22:08,387 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:22:08,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:22:08,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:22:08,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:22:08,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 23:22:08,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:22:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1670200017, now seen corresponding path program 1 times [2023-08-03 23:22:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:22:08,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035793860] [2023-08-03 23:22:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:22:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:22:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:22:08,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:22:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:22:08,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:22:08,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:22:08,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 23:22:08,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-03 23:22:08,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 23:22:08,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 23:22:08,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:22:08,512 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:22:08,514 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:22:08,514 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:22:08,514 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:22:08,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:22:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 187 transitions, 422 flow [2023-08-03 23:22:08,994 INFO L124 PetriNetUnfolderBase]: 282/4351 cut-off events. [2023-08-03 23:22:08,995 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 23:22:09,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 4351 events. 282/4351 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42419 event pairs, 0 based on Foata normal form. 0/3814 useless extension candidates. Maximal degree in co-relation 3119. Up to 162 conditions per place. [2023-08-03 23:22:09,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 187 transitions, 422 flow [2023-08-03 23:22:09,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 156 transitions, 360 flow [2023-08-03 23:22:09,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:22:09,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 156 transitions, 360 flow [2023-08-03 23:22:09,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 156 transitions, 360 flow [2023-08-03 23:22:09,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 156 transitions, 360 flow [2023-08-03 23:22:09,159 INFO L124 PetriNetUnfolderBase]: 39/1840 cut-off events. [2023-08-03 23:22:09,160 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 23:22:09,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2129 conditions, 1840 events. 39/1840 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 14660 event pairs, 0 based on Foata normal form. 0/1708 useless extension candidates. Maximal degree in co-relation 1445. Up to 81 conditions per place. [2023-08-03 23:22:09,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 5976 [2023-08-03 23:22:11,986 INFO L134 LiptonReduction]: Checked pairs total: 16384 [2023-08-03 23:22:11,987 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-03 23:22:11,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:22:11,994 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;@12741ed1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:22:11,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:22:12,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:22:12,002 INFO L124 PetriNetUnfolderBase]: 0/91 cut-off events. [2023-08-03 23:22:12,002 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 23:22:12,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:22:12,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:22:12,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 23:22:12,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:22:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1620108158, now seen corresponding path program 1 times [2023-08-03 23:22:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:22:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788808608] [2023-08-03 23:22:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:22:12,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:22:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:22:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:22:12,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:22:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788808608] [2023-08-03 23:22:12,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788808608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:22:12,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684557909] [2023-08-03 23:22:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:22:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:22:12,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:22:12,156 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 23:22:12,157 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 23:22:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:22:12,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:22:12,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:22:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:22:12,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:22:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684557909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:22:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:22:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:22:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75776080] [2023-08-03 23:22:12,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:22:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:22:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:22:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:22:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:22:12,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 294 [2023-08-03 23:22:12,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 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 23:22:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:22:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 294 [2023-08-03 23:22:12,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand