./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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 ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:29:54,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:29:54,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:29:54,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:29:54,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:29:54,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:29:54,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:29:54,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:29:54,405 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:29:54,409 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:29:54,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:29:54,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:29:54,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:29:54,412 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:29:54,412 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:29:54,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:29:54,412 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:29:54,413 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:29:54,413 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:29:54,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:29:54,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:29:54,414 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:29:54,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:29:54,414 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:29:54,414 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:29:54,414 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:29:54,415 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:29:54,415 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:29:54,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:29:54,416 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:29:54,416 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:29:54,416 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:29:54,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:29:54,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:29:54,417 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:29:54,417 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:29:54,417 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:29:54,418 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:29:54,418 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:29:54,418 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:29:54,418 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:29:54,418 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:29:54,419 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:29:54,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:29:54,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:29:54,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:29:54,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:29:54,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:29:54,625 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:29:54,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-02-20 11:29:55,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:29:55,986 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:29:55,988 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2024-02-20 11:29:56,029 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/837d1dba1/80796aeea5d14859b7bf466543eb7af8/FLAG301c0480a [2024-02-20 11:29:56,042 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/837d1dba1/80796aeea5d14859b7bf466543eb7af8 [2024-02-20 11:29:56,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:29:56,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:29:56,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:29:56,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:29:56,053 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:29:56,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a42d379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56, skipping insertion in model container [2024-02-20 11:29:56,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:29:56,347 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2024-02-20 11:29:56,353 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:29:56,360 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:29:56,387 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2024-02-20 11:29:56,389 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:29:56,416 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:29:56,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56 WrapperNode [2024-02-20 11:29:56,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:29:56,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:29:56,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:29:56,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:29:56,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,445 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 82 [2024-02-20 11:29:56,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:29:56,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:29:56,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:29:56,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:29:56,454 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,465 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 1, 7]. 70 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 3 writes are split as follows [0, 1, 2]. [2024-02-20 11:29:56,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,471 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,472 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,473 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:29:56,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:29:56,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:29:56,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:29:56,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (1/1) ... [2024-02-20 11:29:56,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:29:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:29:56,502 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) [2024-02-20 11:29:56,519 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 [2024-02-20 11:29:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:29:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:29:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:29:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-20 11:29:56,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-20 11:29:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:29:56,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:29:56,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:29:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:29:56,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:29:56,540 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:29:56,639 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:29:56,640 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:29:56,788 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:29:56,788 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:29:56,895 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:29:56,903 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:29:56,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:29:56 BoogieIcfgContainer [2024-02-20 11:29:56,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:29:56,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:29:56,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:29:56,908 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:29:56,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:29:56" (1/3) ... [2024-02-20 11:29:56,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320ddd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:29:56, skipping insertion in model container [2024-02-20 11:29:56,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:29:56" (2/3) ... [2024-02-20 11:29:56,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320ddd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:29:56, skipping insertion in model container [2024-02-20 11:29:56,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:29:56" (3/3) ... [2024-02-20 11:29:56,910 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2024-02-20 11:29:56,924 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:29:56,924 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:29:56,924 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:29:56,951 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:29:56,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 21 transitions, 46 flow [2024-02-20 11:29:57,016 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2024-02-20 11:29:57,017 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:29:57,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 23 events. 3/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 18. Up to 3 conditions per place. [2024-02-20 11:29:57,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 21 transitions, 46 flow [2024-02-20 11:29:57,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 21 transitions, 46 flow [2024-02-20 11:29:57,039 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:29:57,048 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7023ffa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:29:57,048 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:29:57,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:29:57,059 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-02-20 11:29:57,059 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:29:57,060 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:29:57,061 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-20 11:29:57,061 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:29:57,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:29:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -434469734, now seen corresponding path program 1 times [2024-02-20 11:29:57,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:29:57,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810281649] [2024-02-20 11:29:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:29:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:29:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:57,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:29:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:57,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:29:57,220 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:29:57,221 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-20 11:29:57,222 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-20 11:29:57,223 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-20 11:29:57,224 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:29:57,224 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:29:57,227 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:29:57,227 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-20 11:29:57,255 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:29:57,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 37 transitions, 84 flow [2024-02-20 11:29:57,276 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-02-20 11:29:57,276 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:29:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 42 events. 6/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 82 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-02-20 11:29:57,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 37 transitions, 84 flow [2024-02-20 11:29:57,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 37 transitions, 84 flow [2024-02-20 11:29:57,280 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:29:57,281 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7023ffa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:29:57,281 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 11:29:57,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:29:57,287 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-02-20 11:29:57,287 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:29:57,287 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:29:57,288 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-20 11:29:57,288 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:29:57,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:29:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash -647364506, now seen corresponding path program 1 times [2024-02-20 11:29:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:29:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757647524] [2024-02-20 11:29:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:29:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:29:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:57,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:29:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:57,333 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:29:57,334 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:29:57,334 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-20 11:29:57,334 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-20 11:29:57,334 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-20 11:29:57,335 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-20 11:29:57,335 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:29:57,335 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:29:57,335 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:29:57,335 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-20 11:29:57,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:29:57,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 53 transitions, 124 flow [2024-02-20 11:29:57,387 INFO L124 PetriNetUnfolderBase]: 9/61 cut-off events. [2024-02-20 11:29:57,400 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:29:57,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 9/61 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 148 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-02-20 11:29:57,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 53 transitions, 124 flow [2024-02-20 11:29:57,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 53 transitions, 124 flow [2024-02-20 11:29:57,403 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:29:57,406 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7023ffa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:29:57,407 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:29:57,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:29:57,418 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2024-02-20 11:29:57,418 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:29:57,418 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:29:57,418 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:29:57,418 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:29:57,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:29:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash 956783795, now seen corresponding path program 1 times [2024-02-20 11:29:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:29:57,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030186747] [2024-02-20 11:29:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:29:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:29:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:29:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:29:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:29:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030186747] [2024-02-20 11:29:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030186747] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:29:57,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:29:57,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:29:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325795316] [2024-02-20 11:29:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:29:57,512 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 11:29:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:29:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 11:29:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 11:29:57,543 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-20 11:29:57,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 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) [2024-02-20 11:29:57,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:29:57,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-20 11:29:57,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:29:58,322 INFO L124 PetriNetUnfolderBase]: 4505/7646 cut-off events. [2024-02-20 11:29:58,323 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-02-20 11:29:58,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14181 conditions, 7646 events. 4505/7646 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 50162 event pairs, 3878 based on Foata normal form. 588/7721 useless extension candidates. Maximal degree in co-relation 6885. Up to 6249 conditions per place. [2024-02-20 11:29:58,406 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 27 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2024-02-20 11:29:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 158 flow [2024-02-20 11:29:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 11:29:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 11:29:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2024-02-20 11:29:58,415 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6509433962264151 [2024-02-20 11:29:58,419 INFO L308 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-02-20 11:29:58,422 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 158 flow [2024-02-20 11:29:58,423 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 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) [2024-02-20 11:29:58,423 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:29:58,423 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-20 11:29:58,423 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:29:58,423 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:29:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:29:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1550276615, now seen corresponding path program 1 times [2024-02-20 11:29:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:29:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937612344] [2024-02-20 11:29:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:29:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:29:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:58,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:29:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:29:58,474 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:29:58,474 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:29:58,474 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-20 11:29:58,474 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-20 11:29:58,475 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-20 11:29:58,475 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-20 11:29:58,475 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-20 11:29:58,475 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:29:58,475 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:29:58,476 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:29:58,476 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-20 11:29:58,507 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:29:58,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 69 transitions, 166 flow [2024-02-20 11:29:58,517 INFO L124 PetriNetUnfolderBase]: 12/80 cut-off events. [2024-02-20 11:29:58,518 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:29:58,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 80 events. 12/80 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 213 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2024-02-20 11:29:58,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 69 transitions, 166 flow [2024-02-20 11:29:58,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 69 transitions, 166 flow [2024-02-20 11:29:58,521 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:29:58,525 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7023ffa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:29:58,525 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:29:58,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:29:58,529 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2024-02-20 11:29:58,529 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-20 11:29:58,529 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:29:58,529 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:29:58,530 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:29:58,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:29:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash -562569625, now seen corresponding path program 1 times [2024-02-20 11:29:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:29:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72532229] [2024-02-20 11:29:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:29:58,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:29:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:29:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:29:58,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:29:58,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72532229] [2024-02-20 11:29:58,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72532229] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:29:58,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:29:58,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:29:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137182450] [2024-02-20 11:29:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:29:58,572 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 11:29:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:29:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 11:29:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 11:29:58,574 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 69 [2024-02-20 11:29:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2024-02-20 11:29:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:29:58,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 69 [2024-02-20 11:29:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:30:04,458 INFO L124 PetriNetUnfolderBase]: 50073/75726 cut-off events. [2024-02-20 11:30:04,459 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-02-20 11:30:04,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142622 conditions, 75726 events. 50073/75726 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 2099. Compared 576284 event pairs, 43302 based on Foata normal form. 6420/77789 useless extension candidates. Maximal degree in co-relation 17233. Up to 64049 conditions per place. [2024-02-20 11:30:05,036 INFO L140 encePairwiseOnDemand]: 56/69 looper letters, 35 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2024-02-20 11:30:05,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 210 flow [2024-02-20 11:30:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 11:30:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 11:30:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 90 transitions. [2024-02-20 11:30:05,039 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-02-20 11:30:05,040 INFO L308 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-02-20 11:30:05,040 INFO L507 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 210 flow [2024-02-20 11:30:05,040 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 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) [2024-02-20 11:30:05,041 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:30:05,041 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:30:05,041 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:30:05,041 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:30:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:30:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1465951589, now seen corresponding path program 1 times [2024-02-20 11:30:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:30:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226749279] [2024-02-20 11:30:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:30:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:30:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:30:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:30:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:30:05,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226749279] [2024-02-20 11:30:05,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226749279] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:30:05,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:30:05,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-20 11:30:05,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839422533] [2024-02-20 11:30:05,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:30:05,163 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:30:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:30:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:30:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:30:05,186 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 69 [2024-02-20 11:30:05,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-02-20 11:30:05,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:30:05,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 69 [2024-02-20 11:30:05,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand