./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/pthread-complex/safestack_relacy.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 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:37:55,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:37:55,584 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:37:55,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:37:55,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:37:55,617 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:37:55,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:37:55,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:37:55,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:37:55,618 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:37:55,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:37:55,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:37:55,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:37:55,624 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:37:55,624 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:37:55,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:37:55,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:37:55,625 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:37:55,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:37:55,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:37:55,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:37:55,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:37:55,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:37:55,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:37:55,627 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:37:55,627 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:37:55,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:37:55,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:37:55,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:37:55,628 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:37:55,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:37:55,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:37:55,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:37:55,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:37:55,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:37:55,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:37:55,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:37:55,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 [2024-11-22 13:37:55,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:37:55,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:37:55,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:37:55,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:37:55,863 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:37:55,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-22 13:37:57,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:37:57,515 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:37:57,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-22 13:37:57,535 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dce734ef/f87a850ba6264a10a21a7030628f8cc5/FLAG448591aa0 [2024-11-22 13:37:57,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dce734ef/f87a850ba6264a10a21a7030628f8cc5 [2024-11-22 13:37:57,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:37:57,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:37:57,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:37:57,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:37:57,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:37:57,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:57" (1/1) ... [2024-11-22 13:37:57,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeca636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:57, skipping insertion in model container [2024-11-22 13:37:57,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:37:57" (1/1) ... [2024-11-22 13:37:57,882 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:37:58,314 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2024-11-22 13:37:58,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:37:58,334 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:37:58,395 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i[76630,76643] [2024-11-22 13:37:58,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:37:58,559 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:37:58,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58 WrapperNode [2024-11-22 13:37:58,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:37:58,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:37:58,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:37:58,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:37:58,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,639 INFO L138 Inliner]: procedures = 458, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2024-11-22 13:37:58,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:37:58,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:37:58,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:37:58,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:37:58,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,668 INFO L175 MemorySlicer]: Split 37 memory accesses to 3 slices as follows [2, 5, 30]. 81 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 3, 8]. The 13 writes are split as follows [0, 1, 12]. [2024-11-22 13:37:58,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,680 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,683 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:37:58,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:37:58,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:37:58,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:37:58,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (1/1) ... [2024-11-22 13:37:58,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:37:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:37:58,732 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) [2024-11-22 13:37:58,734 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 [2024-11-22 13:37:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:37:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:37:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-11-22 13:37:58,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:37:58,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 13:37:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:37:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:37:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 13:37:58,770 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:37:59,011 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:37:59,013 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:37:59,248 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:37:59,248 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:37:59,449 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:37:59,450 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-22 13:37:59,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:59 BoogieIcfgContainer [2024-11-22 13:37:59,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:37:59,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:37:59,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:37:59,456 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:37:59,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:37:57" (1/3) ... [2024-11-22 13:37:59,457 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b522cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:59, skipping insertion in model container [2024-11-22 13:37:59,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:58" (2/3) ... [2024-11-22 13:37:59,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b522cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:59, skipping insertion in model container [2024-11-22 13:37:59,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:59" (3/3) ... [2024-11-22 13:37:59,459 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-11-22 13:37:59,473 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:37:59,474 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:37:59,474 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:37:59,522 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-22 13:37:59,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 61 transitions, 129 flow [2024-11-22 13:37:59,603 INFO L124 PetriNetUnfolderBase]: 12/65 cut-off events. [2024-11-22 13:37:59,603 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 13:37:59,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 12/65 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 119 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-11-22 13:37:59,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 61 transitions, 129 flow [2024-11-22 13:37:59,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 59 transitions, 122 flow [2024-11-22 13:37:59,621 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:37:59,628 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;@7b9bbbbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:37:59,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:37:59,637 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:37:59,637 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-11-22 13:37:59,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:37:59,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:37:59,639 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:37:59,639 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:37:59,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:37:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1599309038, now seen corresponding path program 1 times [2024-11-22 13:37:59,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:37:59,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530766390] [2024-11-22 13:37:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:37:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:37:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:38:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:38:00,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530766390] [2024-11-22 13:38:00,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530766390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:38:00,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:38:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:38:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752873081] [2024-11-22 13:38:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:38:00,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:38:00,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:38:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:38:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:38:00,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-11-22 13:38:00,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-22 13:38:00,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:38:00,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-11-22 13:38:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:38:00,295 INFO L124 PetriNetUnfolderBase]: 177/393 cut-off events. [2024-11-22 13:38:00,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 13:38:00,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 393 events. 177/393 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1416 event pairs, 140 based on Foata normal form. 7/304 useless extension candidates. Maximal degree in co-relation 710. Up to 344 conditions per place. [2024-11-22 13:38:00,304 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 45 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-22 13:38:00,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 216 flow [2024-11-22 13:38:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:38:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:38:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-22 13:38:00,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3524590163934426 [2024-11-22 13:38:00,317 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 122 flow. Second operand 4 states and 86 transitions. [2024-11-22 13:38:00,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 216 flow [2024-11-22 13:38:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:38:00,325 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 130 flow [2024-11-22 13:38:00,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2024-11-22 13:38:00,329 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-11-22 13:38:00,329 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 130 flow [2024-11-22 13:38:00,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-22 13:38:00,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:00,330 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:00,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:38:00,331 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:38:00,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1172691118, now seen corresponding path program 1 times [2024-11-22 13:38:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:00,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390893955] [2024-11-22 13:38:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:00,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:38:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:38:00,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390893955] [2024-11-22 13:38:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390893955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:38:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476464718] [2024-11-22 13:38:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:00,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:38:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:38:00,474 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) [2024-11-22 13:38:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:38:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:00,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 13:38:00,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:38:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:38:00,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:38:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 13:38:00,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476464718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:38:00,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:38:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 13:38:00,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152284205] [2024-11-22 13:38:00,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:38:00,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:38:00,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:38:00,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:38:00,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:38:00,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 61 [2024-11-22 13:38:00,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 130 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-22 13:38:00,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:38:00,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 61 [2024-11-22 13:38:00,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:38:00,875 INFO L124 PetriNetUnfolderBase]: 177/396 cut-off events. [2024-11-22 13:38:00,876 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-22 13:38:00,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 396 events. 177/396 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1417 event pairs, 140 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 729. Up to 344 conditions per place. [2024-11-22 13:38:00,879 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 47 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-22 13:38:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 250 flow [2024-11-22 13:38:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:38:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:38:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-22 13:38:00,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2650273224043716 [2024-11-22 13:38:00,881 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 130 flow. Second operand 6 states and 97 transitions. [2024-11-22 13:38:00,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 250 flow [2024-11-22 13:38:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 13:38:00,883 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 156 flow [2024-11-22 13:38:00,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-22 13:38:00,884 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-11-22 13:38:00,884 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 156 flow [2024-11-22 13:38:00,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2024-11-22 13:38:00,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:00,884 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:00,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:38:01,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:38:01,086 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 13:38:01,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1801828974, now seen corresponding path program 2 times [2024-11-22 13:38:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:01,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634719805] [2024-11-22 13:38:01,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:38:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:01,125 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:38:01,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-22 13:38:01,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:38:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:38:01,182 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:38:01,182 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:38:01,183 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-22 13:38:01,186 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-22 13:38:01,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-22 13:38:01,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:38:01,191 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-22 13:38:01,193 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:38:01,193 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-22 13:38:01,233 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:38:01,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 105 transitions, 226 flow [2024-11-22 13:38:01,246 INFO L124 PetriNetUnfolderBase]: 24/120 cut-off events. [2024-11-22 13:38:01,247 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 13:38:01,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 120 events. 24/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 370 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2024-11-22 13:38:01,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 105 transitions, 226 flow [2024-11-22 13:38:01,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 105 transitions, 226 flow [2024-11-22 13:38:01,251 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:38:01,255 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;@7b9bbbbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:38:01,255 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-22 13:38:01,259 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:38:01,259 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-22 13:38:01,259 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 13:38:01,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:01,260 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:01,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-22 13:38:01,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2073651636, now seen corresponding path program 1 times [2024-11-22 13:38:01,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:01,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694486697] [2024-11-22 13:38:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:01,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:38:01,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:38:01,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694486697] [2024-11-22 13:38:01,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694486697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:38:01,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:38:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 13:38:01,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451450235] [2024-11-22 13:38:01,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:38:01,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 13:38:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:38:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 13:38:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 13:38:01,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 105 [2024-11-22 13:38:01,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-22 13:38:01,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:38:01,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 105 [2024-11-22 13:38:01,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:38:02,828 INFO L124 PetriNetUnfolderBase]: 11750/18199 cut-off events. [2024-11-22 13:38:02,828 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-11-22 13:38:02,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35516 conditions, 18199 events. 11750/18199 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 109530 event pairs, 9966 based on Foata normal form. 378/14667 useless extension candidates. Maximal degree in co-relation 30873. Up to 17155 conditions per place. [2024-11-22 13:38:02,922 INFO L140 encePairwiseOnDemand]: 92/105 looper letters, 81 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-22 13:38:02,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 384 flow [2024-11-22 13:38:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 13:38:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 13:38:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-22 13:38:02,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-22 13:38:02,924 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 226 flow. Second operand 4 states and 150 transitions. [2024-11-22 13:38:02,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 384 flow [2024-11-22 13:38:02,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 13:38:02,927 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 226 flow [2024-11-22 13:38:02,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-11-22 13:38:02,928 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 4 predicate places. [2024-11-22 13:38:02,928 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 226 flow [2024-11-22 13:38:02,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-22 13:38:02,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:02,929 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:02,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:38:02,929 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-22 13:38:02,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1731906151, now seen corresponding path program 1 times [2024-11-22 13:38:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093536067] [2024-11-22 13:38:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:38:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:38:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093536067] [2024-11-22 13:38:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093536067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:38:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034838132] [2024-11-22 13:38:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:03,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:38:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:38:03,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:38:03,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:38:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:03,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 13:38:03,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:38:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:38:03,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:38:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 13:38:03,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034838132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:38:03,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:38:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 13:38:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775099320] [2024-11-22 13:38:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:38:03,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 13:38:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:38:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 13:38:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-22 13:38:03,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 105 [2024-11-22 13:38:03,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-11-22 13:38:03,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:38:03,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 105 [2024-11-22 13:38:03,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:38:04,421 INFO L124 PetriNetUnfolderBase]: 11750/18202 cut-off events. [2024-11-22 13:38:04,422 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-11-22 13:38:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35534 conditions, 18202 events. 11750/18202 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 109521 event pairs, 9966 based on Foata normal form. 1/14293 useless extension candidates. Maximal degree in co-relation 35493. Up to 17155 conditions per place. [2024-11-22 13:38:04,505 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 83 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-11-22 13:38:04,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 418 flow [2024-11-22 13:38:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:38:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:38:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-22 13:38:04,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26825396825396824 [2024-11-22 13:38:04,509 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 226 flow. Second operand 6 states and 169 transitions. [2024-11-22 13:38:04,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 418 flow [2024-11-22 13:38:04,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 13:38:04,512 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 252 flow [2024-11-22 13:38:04,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-11-22 13:38:04,515 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 9 predicate places. [2024-11-22 13:38:04,515 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 252 flow [2024-11-22 13:38:04,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-11-22 13:38:04,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:04,515 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:04,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:38:04,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:38:04,717 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-22 13:38:04,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -135345964, now seen corresponding path program 2 times [2024-11-22 13:38:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368440779] [2024-11-22 13:38:04,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:38:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:04,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:38:04,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-22 13:38:04,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 13:38:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 13:38:04,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 13:38:04,770 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 13:38:04,771 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-22 13:38:04,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-22 13:38:04,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-22 13:38:04,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-22 13:38:04,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 13:38:04,771 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-22 13:38:04,772 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 13:38:04,772 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-22 13:38:04,822 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 13:38:04,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 325 flow [2024-11-22 13:38:04,840 INFO L124 PetriNetUnfolderBase]: 39/186 cut-off events. [2024-11-22 13:38:04,841 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-22 13:38:04,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 186 events. 39/186 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 754 event pairs, 1 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 148. Up to 12 conditions per place. [2024-11-22 13:38:04,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 325 flow [2024-11-22 13:38:04,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 325 flow [2024-11-22 13:38:04,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:38:04,846 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;@7b9bbbbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:38:04,847 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-22 13:38:04,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:38:04,850 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-11-22 13:38:04,850 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 13:38:04,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:38:04,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:38:04,850 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-22 13:38:04,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:38:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1524859389, now seen corresponding path program 1 times [2024-11-22 13:38:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:38:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710060622] [2024-11-22 13:38:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:38:04,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:38:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:38:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:38:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:38:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710060622] [2024-11-22 13:38:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710060622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:38:04,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:38:04,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:38:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179803275] [2024-11-22 13:38:04,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:38:04,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 13:38:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:38:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 13:38:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 13:38:04,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 149 [2024-11-22 13:38:04,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 325 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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) [2024-11-22 13:38:04,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:38:04,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 149 [2024-11-22 13:38:04,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand