./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:01:56,845 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:01:56,909 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:01:56,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:01:56,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:01:56,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:01:56,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:01:56,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:01:56,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:01:56,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:01:56,952 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:01:56,953 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:01:56,953 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:01:56,955 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:01:56,955 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:01:56,955 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:01:56,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:01:56,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:01:56,957 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:01:56,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:01:56,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:01:56,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:01:56,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:01:56,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:01:56,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:01:56,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:01:56,959 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:01:56,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:01:56,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:01:56,960 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:01:56,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:01:56,960 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E 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 -> Taipan 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 -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-11-14 04:01:57,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:01:57,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:01:57,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:01:57,329 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:01:57,331 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:01:57,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/pthread/twostage_3.i Unable to find full path for "g++" [2024-11-14 04:01:59,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:01:59,584 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:01:59,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/sv-benchmarks/c/pthread/twostage_3.i [2024-11-14 04:01:59,608 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/data/47f08f751/439bc8ab25e8443c94dd43b74d1217f6/FLAG20b138973 [2024-11-14 04:01:59,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/data/47f08f751/439bc8ab25e8443c94dd43b74d1217f6 [2024-11-14 04:01:59,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:01:59,646 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:01:59,647 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:01:59,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:01:59,654 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:01:59,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:59" (1/1) ... [2024-11-14 04:01:59,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29354572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:59, skipping insertion in model container [2024-11-14 04:01:59,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:59" (1/1) ... [2024-11-14 04:01:59,722 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:02:00,524 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2024-11-14 04:02:00,550 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-14 04:02:00,551 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-14 04:02:00,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:02:00,563 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:02:00,648 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2024-11-14 04:02:00,661 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-14 04:02:00,662 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-14 04:02:00,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:02:00,749 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:02:00,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00 WrapperNode [2024-11-14 04:02:00,750 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:02:00,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:02:00,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:02:00,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:02:00,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,825 INFO L138 Inliner]: procedures = 373, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 136 [2024-11-14 04:02:00,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:02:00,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:02:00,831 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:02:00,831 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:02:00,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,871 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:02:00,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:02:00,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:02:00,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:02:00,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (1/1) ... [2024-11-14 04:02:00,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:02:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:00,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:02:00,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aedf5635-b8e5-4259-86f0-7a5572470c12/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:02:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-11-14 04:02:00,959 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-11-14 04:02:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-11-14 04:02:00,959 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-11-14 04:02:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:02:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:02:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:02:00,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:02:00,962 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-14 04:02:01,154 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:02:01,156 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:02:01,559 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-14 04:02:01,559 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:02:01,887 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:02:01,887 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 04:02:01,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:02:01 BoogieIcfgContainer [2024-11-14 04:02:01,890 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:02:01,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:02:01,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:02:01,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:02:01,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:01:59" (1/3) ... [2024-11-14 04:02:01,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346a1a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:02:01, skipping insertion in model container [2024-11-14 04:02:01,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:02:00" (2/3) ... [2024-11-14 04:02:01,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346a1a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:02:01, skipping insertion in model container [2024-11-14 04:02:01,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:02:01" (3/3) ... [2024-11-14 04:02:01,903 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-11-14 04:02:01,922 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:02:01,924 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG twostage_3.i that has 3 procedures, 46 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 04:02:01,924 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-14 04:02:01,997 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-14 04:02:02,043 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 53 transitions, 126 flow [2024-11-14 04:02:02,233 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2170 states, 2161 states have (on average 2.7070800555298473) internal successors, (5850), 2169 states have internal predecessors, (5850), 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) [2024-11-14 04:02:02,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:02:02,314 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=FINITE_AUTOMATA, 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;@32b395dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:02:02,317 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-14 04:02:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 2170 states, 2161 states have (on average 2.7070800555298473) internal successors, (5850), 2169 states have internal predecessors, (5850), 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) [2024-11-14 04:02:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:02:02,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:02,332 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-14 04:02:02,332 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-14 04:02:02,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1452479216, now seen corresponding path program 1 times [2024-11-14 04:02:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086353531] [2024-11-14 04:02:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:02:02,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 04:02:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:02:02,628 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 04:02:02,632 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 04:02:02,633 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-14 04:02:02,636 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-14 04:02:02,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-14 04:02:02,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-14 04:02:02,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:02:02,645 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-14 04:02:02,648 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-14 04:02:02,648 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-14 04:02:02,689 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-14 04:02:02,696 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 88 places, 91 transitions, 226 flow [2024-11-14 04:02:26,321 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 680768 states, 680729 states have (on average 4.657636151831346) internal successors, (3170588), 680767 states have internal predecessors, (3170588), 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) [2024-11-14 04:02:26,329 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:02:26,329 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=FINITE_AUTOMATA, 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;@32b395dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:02:26,329 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-14 04:02:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 680768 states, 680729 states have (on average 4.657636151831346) internal successors, (3170588), 680767 states have internal predecessors, (3170588), 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) [2024-11-14 04:02:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:02:27,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:27,481 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-14 04:02:27,481 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-14 04:02:27,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2117957797, now seen corresponding path program 1 times [2024-11-14 04:02:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890281859] [2024-11-14 04:02:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:02:27,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 04:02:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:02:27,606 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 04:02:27,606 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 04:02:27,606 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-14 04:02:27,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-14 04:02:27,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-14 04:02:27,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-14 04:02:27,607 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-14 04:02:27,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:02:27,612 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-14 04:02:27,612 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-14 04:02:27,612 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-14 04:02:27,675 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-11-14 04:02:27,681 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 124 places, 129 transitions, 330 flow