./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 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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-3061b6d-m [2024-11-19 01:38:21,430 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:38:21,493 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:38:21,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:38:21,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:38:21,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:38:21,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:38:21,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:38:21,535 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:38:21,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:38:21,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:38:21,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:38:21,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:38:21,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:38:21,537 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:38:21,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:38:21,537 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:38:21,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:38:21,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:38:21,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:38:21,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:38:21,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:38:21,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:38:21,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:38:21,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:38:21,541 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:38:21,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:38:21,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:38:21,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:38:21,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:38:21,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:38:21,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:38:21,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:38:21,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:38:21,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:38:21,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:38:21,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:38:21,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:38:21,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:38:21,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:38:21,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:38:21,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:38:21,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 516fee84c55ddb7fa4275a43ad5a2da6ea994abf63bbbbd8ed5c82108d65f7b0 [2024-11-19 01:38:21,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:38:21,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:38:21,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:38:21,798 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:38:21,798 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:38:21,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-19 01:38:23,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:38:23,433 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:38:23,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2024-11-19 01:38:23,454 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354a9117e/512042ac5fe44452bf85f9ac5ca38e14/FLAGc569bef8b [2024-11-19 01:38:23,467 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354a9117e/512042ac5fe44452bf85f9ac5ca38e14 [2024-11-19 01:38:23,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:38:23,470 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:38:23,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:38:23,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:38:23,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:38:23,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:23" (1/1) ... [2024-11-19 01:38:23,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3125f94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:23, skipping insertion in model container [2024-11-19 01:38:23,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:23" (1/1) ... [2024-11-19 01:38:23,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:38:24,156 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] [2024-11-19 01:38:24,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:38:24,185 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:38:24,364 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] [2024-11-19 01:38:24,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:38:24,491 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:38:24,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24 WrapperNode [2024-11-19 01:38:24,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:38:24,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:38:24,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:38:24,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:38:24,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,593 INFO L138 Inliner]: procedures = 458, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2024-11-19 01:38:24,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:38:24,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:38:24,599 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:38:24,600 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:38:24,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,622 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,646 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]. [2024-11-19 01:38:24,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:38:24,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:38:24,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:38:24,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:38:24,711 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (1/1) ... [2024-11-19 01:38:24,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:38:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:38:24,775 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) [2024-11-19 01:38:24,787 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 [2024-11-19 01:38:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:38:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:38:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 01:38:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:38:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-11-19 01:38:24,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-11-19 01:38:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:38:24,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:38:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:38:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:38:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 01:38:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:38:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:38:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 01:38:24,830 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:38:25,039 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:38:25,041 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:38:25,235 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:38:25,235 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:38:25,460 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:38:25,462 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-19 01:38:25,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:25 BoogieIcfgContainer [2024-11-19 01:38:25,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:38:25,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:38:25,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:38:25,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:38:25,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:38:23" (1/3) ... [2024-11-19 01:38:25,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e83cd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:25, skipping insertion in model container [2024-11-19 01:38:25,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:24" (2/3) ... [2024-11-19 01:38:25,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e83cd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:25, skipping insertion in model container [2024-11-19 01:38:25,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:25" (3/3) ... [2024-11-19 01:38:25,472 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-11-19 01:38:25,486 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:38:25,487 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:38:25,487 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:38:25,541 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-19 01:38:25,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 61 transitions, 129 flow [2024-11-19 01:38:25,599 INFO L124 PetriNetUnfolderBase]: 12/65 cut-off events. [2024-11-19 01:38:25,600 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:38:25,603 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. [2024-11-19 01:38:25,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 61 transitions, 129 flow [2024-11-19 01:38:25,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 59 transitions, 122 flow [2024-11-19 01:38:25,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:38:25,618 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;@112dc08e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:38:25,619 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:38:25,624 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:38:25,624 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-11-19 01:38:25,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:38:25,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:25,625 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:25,626 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 01:38:25,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1599309038, now seen corresponding path program 1 times [2024-11-19 01:38:25,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:25,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151840643] [2024-11-19 01:38:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:25,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:38:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:38:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151840643] [2024-11-19 01:38:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151840643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:38:26,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:38:26,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:38:26,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668492397] [2024-11-19 01:38:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:38:26,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:38:26,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:38:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:38:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:38:26,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 61 [2024-11-19 01:38:26,074 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) [2024-11-19 01:38:26,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:38:26,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 61 [2024-11-19 01:38:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:38:26,212 INFO L124 PetriNetUnfolderBase]: 177/393 cut-off events. [2024-11-19 01:38:26,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:38:26,215 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. [2024-11-19 01:38:26,221 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 45 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-19 01:38:26,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 216 flow [2024-11-19 01:38:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:38:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:38:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-19 01:38:26,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3524590163934426 [2024-11-19 01:38:26,234 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 122 flow. Second operand 4 states and 86 transitions. [2024-11-19 01:38:26,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 216 flow [2024-11-19 01:38:26,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:38:26,242 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 130 flow [2024-11-19 01:38:26,245 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} [2024-11-19 01:38:26,253 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-11-19 01:38:26,253 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 130 flow [2024-11-19 01:38:26,253 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) [2024-11-19 01:38:26,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:26,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:26,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:38:26,255 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 01:38:26,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1172691118, now seen corresponding path program 1 times [2024-11-19 01:38:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595577575] [2024-11-19 01:38:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:38:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:38:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595577575] [2024-11-19 01:38:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595577575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:38:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960822209] [2024-11-19 01:38:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:26,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:38:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:38:26,518 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) [2024-11-19 01:38:26,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:38:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:26,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:38:26,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:38:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:38:26,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:38:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:38:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960822209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:38:26,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:38:26,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 01:38:26,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801519770] [2024-11-19 01:38:26,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:38:26,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:38:26,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:38:26,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:38:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:38:26,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 61 [2024-11-19 01:38:26,805 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) [2024-11-19 01:38:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:38:26,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 61 [2024-11-19 01:38:26,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:38:26,983 INFO L124 PetriNetUnfolderBase]: 177/396 cut-off events. [2024-11-19 01:38:26,983 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:38:26,984 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. [2024-11-19 01:38:26,986 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 47 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-19 01:38:26,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 61 transitions, 250 flow [2024-11-19 01:38:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:38:26,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:38:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-11-19 01:38:26,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2650273224043716 [2024-11-19 01:38:26,988 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 130 flow. Second operand 6 states and 97 transitions. [2024-11-19 01:38:26,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 61 transitions, 250 flow [2024-11-19 01:38:26,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:38:26,990 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 156 flow [2024-11-19 01:38:26,991 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} [2024-11-19 01:38:26,991 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-11-19 01:38:26,991 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 156 flow [2024-11-19 01:38:26,992 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) [2024-11-19 01:38:26,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:26,992 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:27,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:38:27,196 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 [2024-11-19 01:38:27,197 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 01:38:27,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1801828974, now seen corresponding path program 2 times [2024-11-19 01:38:27,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:27,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946129984] [2024-11-19 01:38:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:38:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:27,243 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:38:27,244 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-19 01:38:27,244 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:38:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:38:27,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:38:27,295 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:38:27,296 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-19 01:38:27,301 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-19 01:38:27,302 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-19 01:38:27,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:38:27,302 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-19 01:38:27,306 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:38:27,306 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 01:38:27,351 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:38:27,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 105 transitions, 226 flow [2024-11-19 01:38:27,365 INFO L124 PetriNetUnfolderBase]: 24/120 cut-off events. [2024-11-19 01:38:27,366 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 01:38:27,368 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. [2024-11-19 01:38:27,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 105 transitions, 226 flow [2024-11-19 01:38:27,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 105 transitions, 226 flow [2024-11-19 01:38:27,370 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:38:27,372 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;@112dc08e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:38:27,372 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-19 01:38:27,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:38:27,377 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-19 01:38:27,377 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:38:27,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:27,377 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:27,377 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)] === [2024-11-19 01:38:27,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:27,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2073651636, now seen corresponding path program 1 times [2024-11-19 01:38:27,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:27,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362458444] [2024-11-19 01:38:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:27,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:38:27,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:38:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362458444] [2024-11-19 01:38:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362458444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:38:27,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:38:27,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:38:27,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588171868] [2024-11-19 01:38:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:38:27,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:38:27,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:38:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:38:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:38:27,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 105 [2024-11-19 01:38:27,477 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) [2024-11-19 01:38:27,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:38:27,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 105 [2024-11-19 01:38:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:38:29,245 INFO L124 PetriNetUnfolderBase]: 11750/18199 cut-off events. [2024-11-19 01:38:29,246 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-11-19 01:38:29,276 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. [2024-11-19 01:38:29,350 INFO L140 encePairwiseOnDemand]: 92/105 looper letters, 81 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-19 01:38:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 384 flow [2024-11-19 01:38:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:38:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:38:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-19 01:38:29,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-11-19 01:38:29,352 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 226 flow. Second operand 4 states and 150 transitions. [2024-11-19 01:38:29,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 384 flow [2024-11-19 01:38:29,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:38:29,357 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 226 flow [2024-11-19 01:38:29,357 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} [2024-11-19 01:38:29,359 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 4 predicate places. [2024-11-19 01:38:29,360 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 226 flow [2024-11-19 01:38:29,360 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) [2024-11-19 01:38:29,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:29,360 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:29,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:38:29,360 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)] === [2024-11-19 01:38:29,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1731906151, now seen corresponding path program 1 times [2024-11-19 01:38:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:29,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986722442] [2024-11-19 01:38:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:29,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:38:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:38:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986722442] [2024-11-19 01:38:29,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986722442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:38:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125148057] [2024-11-19 01:38:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:29,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:38:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:38:29,455 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) [2024-11-19 01:38:29,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:38:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:29,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:38:29,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:38:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:38:29,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:38:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 01:38:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125148057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:38:29,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:38:29,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 01:38:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516898243] [2024-11-19 01:38:29,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:38:29,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:38:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:38:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:38:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:38:29,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 105 [2024-11-19 01:38:29,643 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) [2024-11-19 01:38:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:38:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 105 [2024-11-19 01:38:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:38:31,034 INFO L124 PetriNetUnfolderBase]: 11750/18202 cut-off events. [2024-11-19 01:38:31,034 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-11-19 01:38:31,051 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. [2024-11-19 01:38:31,107 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 83 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2024-11-19 01:38:31,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 418 flow [2024-11-19 01:38:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:38:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:38:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-19 01:38:31,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26825396825396824 [2024-11-19 01:38:31,111 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 226 flow. Second operand 6 states and 169 transitions. [2024-11-19 01:38:31,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 418 flow [2024-11-19 01:38:31,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:38:31,114 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 252 flow [2024-11-19 01:38:31,116 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} [2024-11-19 01:38:31,117 INFO L277 CegarLoopForPetriNet]: 87 programPoint places, 9 predicate places. [2024-11-19 01:38:31,117 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 252 flow [2024-11-19 01:38:31,118 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) [2024-11-19 01:38:31,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:31,118 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:31,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:38:31,318 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 [2024-11-19 01:38:31,320 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)] === [2024-11-19 01:38:31,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -135345964, now seen corresponding path program 2 times [2024-11-19 01:38:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865351954] [2024-11-19 01:38:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:38:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:31,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:38:31,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-19 01:38:31,345 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:38:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:38:31,371 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:38:31,372 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:38:31,372 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-19 01:38:31,372 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-19 01:38:31,373 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-19 01:38:31,373 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-19 01:38:31,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 01:38:31,373 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-11-19 01:38:31,374 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:38:31,374 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 01:38:31,419 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 01:38:31,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 149 transitions, 325 flow [2024-11-19 01:38:31,435 INFO L124 PetriNetUnfolderBase]: 39/186 cut-off events. [2024-11-19 01:38:31,436 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 01:38:31,437 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. [2024-11-19 01:38:31,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 149 transitions, 325 flow [2024-11-19 01:38:31,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 149 transitions, 325 flow [2024-11-19 01:38:31,440 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:38:31,441 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;@112dc08e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:38:31,441 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-19 01:38:31,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:38:31,444 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-11-19 01:38:31,444 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 01:38:31,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:38:31,445 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:38:31,445 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-11-19 01:38:31,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:38:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1524859389, now seen corresponding path program 1 times [2024-11-19 01:38:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:38:31,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934364413] [2024-11-19 01:38:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:38:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:38:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:38:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:38:31,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:38:31,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934364413] [2024-11-19 01:38:31,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934364413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:38:31,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:38:31,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:38:31,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128761242] [2024-11-19 01:38:31,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:38:31,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 01:38:31,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:38:31,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 01:38:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 01:38:31,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 149 [2024-11-19 01:38:31,507 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) [2024-11-19 01:38:31,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:38:31,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 149 [2024-11-19 01:38:31,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand