./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:23:13,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:23:13,481 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:23:13,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:23:13,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:23:13,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:23:13,524 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:23:13,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:23:13,526 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:23:13,527 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:23:13,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:23:13,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:23:13,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:23:13,529 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:23:13,529 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:23:13,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:23:13,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:23:13,533 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:23:13,534 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:23:13,534 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:23:13,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:23:13,535 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:23:13,535 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:23:13,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:23:13,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:23:13,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:23:13,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:23:13,536 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:23:13,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:23:13,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:23:13,537 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:23:13,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:23:13,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:13,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:23:13,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:23:13,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:23:13,540 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:23:13,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:23:13,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:23:13,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:23:13,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:23:13,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:23:13,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-10-24 12:23:13,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:23:13,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:23:13,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:23:13,874 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:23:13,874 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:23:13,876 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-10-24 12:23:15,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:23:15,805 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:23:15,807 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-10-24 12:23:15,828 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/863f9006a/531512e477d74c409e06b64a224aafd4/FLAG69797dac2 [2024-10-24 12:23:16,079 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/863f9006a/531512e477d74c409e06b64a224aafd4 [2024-10-24 12:23:16,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:23:16,082 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:23:16,084 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:16,084 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:23:16,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:23:16,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771bede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16, skipping insertion in model container [2024-10-24 12:23:16,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,152 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:23:16,519 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2024-10-24 12:23:16,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:16,559 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:23:16,606 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2024-10-24 12:23:16,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:23:16,650 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:23:16,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16 WrapperNode [2024-10-24 12:23:16,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:23:16,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:16,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:23:16,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:23:16,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,695 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2024-10-24 12:23:16,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:23:16,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:23:16,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:23:16,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:23:16,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,711 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,727 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-10-24 12:23:16,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,734 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:23:16,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:23:16,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:23:16,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:23:16,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (1/1) ... [2024-10-24 12:23:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:23:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:16,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:23:16,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:23:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:23:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 12:23:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 12:23:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:23:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 12:23:16,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 12:23:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:23:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:23:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:23:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 12:23:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 12:23:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:23:16,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:23:16,856 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:23:16,991 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:23:16,993 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:23:17,207 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:23:17,207 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:23:17,376 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:23:17,376 INFO L314 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-24 12:23:17,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:17 BoogieIcfgContainer [2024-10-24 12:23:17,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:23:17,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:23:17,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:23:17,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:23:17,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:23:16" (1/3) ... [2024-10-24 12:23:17,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57091134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:17, skipping insertion in model container [2024-10-24 12:23:17,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:23:16" (2/3) ... [2024-10-24 12:23:17,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57091134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:23:17, skipping insertion in model container [2024-10-24 12:23:17,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:23:17" (3/3) ... [2024-10-24 12:23:17,385 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-10-24 12:23:17,407 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:23:17,408 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:23:17,408 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:23:17,447 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:23:17,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 45 transitions, 94 flow [2024-10-24 12:23:17,529 INFO L124 PetriNetUnfolderBase]: 12/63 cut-off events. [2024-10-24 12:23:17,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:23:17,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 63 events. 12/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2024-10-24 12:23:17,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 45 transitions, 94 flow [2024-10-24 12:23:17,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 45 transitions, 94 flow [2024-10-24 12:23:17,553 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:17,563 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@341070f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:17,563 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:17,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:17,575 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-10-24 12:23:17,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 12:23:17,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:17,576 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-24 12:23:17,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:17,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash 601361587, now seen corresponding path program 1 times [2024-10-24 12:23:17,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:17,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034048990] [2024-10-24 12:23:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:17,737 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:17,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:17,803 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:17,806 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:17,808 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:17,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:23:17,810 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-24 12:23:17,818 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:17,818 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-24 12:23:17,841 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:23:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 69 transitions, 148 flow [2024-10-24 12:23:17,874 INFO L124 PetriNetUnfolderBase]: 21/106 cut-off events. [2024-10-24 12:23:17,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:23:17,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 106 events. 21/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 396 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2024-10-24 12:23:17,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 69 transitions, 148 flow [2024-10-24 12:23:17,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 69 transitions, 148 flow [2024-10-24 12:23:17,881 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:17,882 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@341070f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:17,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:17,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:17,895 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-10-24 12:23:17,895 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:23:17,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:17,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:17,896 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:17,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash 672864051, now seen corresponding path program 1 times [2024-10-24 12:23:17,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:17,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976193137] [2024-10-24 12:23:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:17,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:18,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:18,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976193137] [2024-10-24 12:23:18,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976193137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:18,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112205061] [2024-10-24 12:23:18,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:18,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:18,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:18,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-10-24 12:23:18,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-24 12:23:18,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:18,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-10-24 12:23:18,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:18,839 INFO L124 PetriNetUnfolderBase]: 1980/4012 cut-off events. [2024-10-24 12:23:18,840 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-24 12:23:18,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 4012 events. 1980/4012 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 28456 event pairs, 1852 based on Foata normal form. 1095/4885 useless extension candidates. Maximal degree in co-relation 5310. Up to 3181 conditions per place. [2024-10-24 12:23:18,877 INFO L140 encePairwiseOnDemand]: 51/69 looper letters, 36 selfloop transitions, 2 changer transitions 6/65 dead transitions. [2024-10-24 12:23:18,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 224 flow [2024-10-24 12:23:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-10-24 12:23:18,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.642512077294686 [2024-10-24 12:23:18,893 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 148 flow. Second operand 3 states and 133 transitions. [2024-10-24 12:23:18,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 224 flow [2024-10-24 12:23:18,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:18,904 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 118 flow [2024-10-24 12:23:18,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-10-24 12:23:18,912 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-10-24 12:23:18,912 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 118 flow [2024-10-24 12:23:18,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-24 12:23:18,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:18,914 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-24 12:23:18,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:23:18,914 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:18,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1517768609, now seen corresponding path program 1 times [2024-10-24 12:23:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:18,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269909416] [2024-10-24 12:23:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:18,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:18,988 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:18,989 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:18,989 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:18,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:18,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:23:18,989 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-24 12:23:18,992 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:18,992 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-24 12:23:19,059 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:23:19,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 93 transitions, 204 flow [2024-10-24 12:23:19,083 INFO L124 PetriNetUnfolderBase]: 30/149 cut-off events. [2024-10-24 12:23:19,084 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-24 12:23:19,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 149 events. 30/149 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 608 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 113. Up to 8 conditions per place. [2024-10-24 12:23:19,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 93 transitions, 204 flow [2024-10-24 12:23:19,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 93 transitions, 204 flow [2024-10-24 12:23:19,089 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:19,090 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@341070f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:19,090 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:19,095 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:19,096 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-10-24 12:23:19,096 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:23:19,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:19,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:19,097 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:19,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1064774221, now seen corresponding path program 1 times [2024-10-24 12:23:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:19,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268715071] [2024-10-24 12:23:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:19,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:19,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268715071] [2024-10-24 12:23:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268715071] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:19,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657348691] [2024-10-24 12:23:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:19,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:19,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 93 [2024-10-24 12:23:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 93 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-10-24 12:23:19,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:19,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 93 [2024-10-24 12:23:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:24,813 INFO L124 PetriNetUnfolderBase]: 30780/51350 cut-off events. [2024-10-24 12:23:24,813 INFO L125 PetriNetUnfolderBase]: For 790/790 co-relation queries the response was YES. [2024-10-24 12:23:24,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94779 conditions, 51350 events. 30780/51350 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 447838 event pairs, 19800 based on Foata normal form. 15982/65184 useless extension candidates. Maximal degree in co-relation 7278. Up to 42981 conditions per place. [2024-10-24 12:23:25,161 INFO L140 encePairwiseOnDemand]: 69/93 looper letters, 46 selfloop transitions, 2 changer transitions 6/83 dead transitions. [2024-10-24 12:23:25,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 288 flow [2024-10-24 12:23:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:23:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:23:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2024-10-24 12:23:25,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6200716845878136 [2024-10-24 12:23:25,167 INFO L175 Difference]: Start difference. First operand has 79 places, 93 transitions, 204 flow. Second operand 3 states and 173 transitions. [2024-10-24 12:23:25,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 288 flow [2024-10-24 12:23:25,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 286 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-24 12:23:25,174 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 160 flow [2024-10-24 12:23:25,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-10-24 12:23:25,176 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2024-10-24 12:23:25,177 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 160 flow [2024-10-24 12:23:25,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-10-24 12:23:25,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:25,178 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:25,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:23:25,178 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:25,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1190804460, now seen corresponding path program 1 times [2024-10-24 12:23:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:25,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516302961] [2024-10-24 12:23:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:25,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516302961] [2024-10-24 12:23:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516302961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:23:25,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654135444] [2024-10-24 12:23:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:25,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:23:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:23:25,287 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) [2024-10-24 12:23:25,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:23:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:25,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 12:23:25,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:23:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:25,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:23:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:25,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654135444] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:23:25,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:23:25,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-24 12:23:25,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162123575] [2024-10-24 12:23:25,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:23:25,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:23:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:23:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:23:25,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 93 [2024-10-24 12:23:25,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 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) [2024-10-24 12:23:25,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:25,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 93 [2024-10-24 12:23:25,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:23:27,415 INFO L124 PetriNetUnfolderBase]: 7668/12948 cut-off events. [2024-10-24 12:23:27,415 INFO L125 PetriNetUnfolderBase]: For 4449/4449 co-relation queries the response was YES. [2024-10-24 12:23:27,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 12948 events. 7668/12948 cut-off events. For 4449/4449 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 98229 event pairs, 990 based on Foata normal form. 1110/13634 useless extension candidates. Maximal degree in co-relation 2602. Up to 7400 conditions per place. [2024-10-24 12:23:27,499 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-24 12:23:27,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 444 flow [2024-10-24 12:23:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:23:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:23:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 281 transitions. [2024-10-24 12:23:27,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503584229390681 [2024-10-24 12:23:27,505 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 160 flow. Second operand 6 states and 281 transitions. [2024-10-24 12:23:27,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 444 flow [2024-10-24 12:23:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:23:27,516 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:27,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-10-24 12:23:27,518 INFO L277 CegarLoopForPetriNet]: 79 programPoint places, -7 predicate places. [2024-10-24 12:23:27,519 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-10-24 12:23:27,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.42857142857143) internal successors, (234), 7 states have internal predecessors, (234), 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) [2024-10-24 12:23:27,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:27,519 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-24 12:23:27,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 12:23:27,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:23:27,721 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:27,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 664016658, now seen corresponding path program 1 times [2024-10-24 12:23:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439196185] [2024-10-24 12:23:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:27,757 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-24 12:23:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-24 12:23:27,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-24 12:23:27,784 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-24 12:23:27,785 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-24 12:23:27,786 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-24 12:23:27,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:23:27,787 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-24 12:23:27,788 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-24 12:23:27,788 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-24 12:23:27,819 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 12:23:27,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 117 transitions, 262 flow [2024-10-24 12:23:27,845 INFO L124 PetriNetUnfolderBase]: 39/192 cut-off events. [2024-10-24 12:23:27,845 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 12:23:27,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 192 events. 39/192 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 845 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 161. Up to 10 conditions per place. [2024-10-24 12:23:27,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 117 transitions, 262 flow [2024-10-24 12:23:27,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 117 transitions, 262 flow [2024-10-24 12:23:27,852 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:23:27,854 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@341070f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:23:27,855 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-24 12:23:27,860 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:23:27,861 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2024-10-24 12:23:27,861 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:23:27,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:23:27,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:23:27,861 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:23:27,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:23:27,862 INFO L85 PathProgramCache]: Analyzing trace with hash 905584691, now seen corresponding path program 1 times [2024-10-24 12:23:27,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:23:27,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143512069] [2024-10-24 12:23:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:23:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:23:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:23:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:23:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:23:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143512069] [2024-10-24 12:23:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143512069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:23:27,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:23:27,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:23:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515098215] [2024-10-24 12:23:27,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:23:27,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:23:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:23:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:23:27,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:23:27,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2024-10-24 12:23:27,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-10-24 12:23:27,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:23:27,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2024-10-24 12:23:27,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand