./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:11:25,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:11:26,016 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DataRace-32bit-Taipan_Default.epf [2024-11-09 01:11:26,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:11:26,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:11:26,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:11:26,063 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:11:26,063 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:11:26,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:11:26,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:11:26,066 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:11:26,066 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:11:26,067 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:11:26,069 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:11:26,070 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:11:26,070 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:11:26,070 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:11:26,071 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:11:26,071 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:11:26,071 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:11:26,072 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:11:26,076 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:11:26,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:11:26,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:11:26,077 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:11:26,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:11:26,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:11:26,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:11:26,078 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:11:26,078 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:11:26,078 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:11:26,079 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-09 01:11:26,079 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:11:26,079 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 01:11:26,080 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:11:26,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:11:26,080 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:11:26,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:11:26,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:11:26,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:11:26,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:11:26,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:11:26,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:11:26,083 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:11:26,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:11:26,084 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:11:26,084 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:11:26,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:11:26,085 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 [2024-11-09 01:11:26,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:11:26,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:11:26,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:11:26,374 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:11:26,375 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:11:26,376 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i Unable to find full path for "g++" [2024-11-09 01:11:28,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:11:28,722 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:11:28,722 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2024-11-09 01:11:28,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/data/486151932/de59ff4fd2ef45f5ad357e8254ee3be1/FLAG73e67918e [2024-11-09 01:11:29,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/data/486151932/de59ff4fd2ef45f5ad357e8254ee3be1 [2024-11-09 01:11:29,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:11:29,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:11:29,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:11:29,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:11:29,070 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:11:29,071 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a981d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29, skipping insertion in model container [2024-11-09 01:11:29,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,137 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:11:29,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:11:29,521 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:11:29,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:11:29,610 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:11:29,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29 WrapperNode [2024-11-09 01:11:29,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:11:29,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:11:29,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:11:29,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:11:29,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,669 INFO L138 Inliner]: procedures = 164, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 110 [2024-11-09 01:11:29,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:11:29,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:11:29,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:11:29,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:11:29,682 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,687 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,708 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:11:29,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:11:29,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:11:29,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:11:29,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (1/1) ... [2024-11-09 01:11:29,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:11:29,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:29,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:11:29,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25d7437b-96ca-4c33-a362-b1030dd6abc8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:11:29,801 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-11-09 01:11:29,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-11-09 01:11:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-09 01:11:29,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-09 01:11:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 01:11:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:11:29,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:11:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 01:11:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:11:29,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:11:29,805 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 01:11:29,945 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:11:29,948 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:11:30,134 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 01:11:30,134 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:11:30,167 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:11:30,167 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 01:11:30,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:11:30 BoogieIcfgContainer [2024-11-09 01:11:30,168 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:11:30,171 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:11:30,171 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:11:30,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:11:30,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:11:29" (1/3) ... [2024-11-09 01:11:30,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b4bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:11:30, skipping insertion in model container [2024-11-09 01:11:30,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:11:29" (2/3) ... [2024-11-09 01:11:30,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b4bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:11:30, skipping insertion in model container [2024-11-09 01:11:30,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:11:30" (3/3) ... [2024-11-09 01:11:30,178 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2024-11-09 01:11:30,196 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:11:30,196 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-09 01:11:30,196 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 01:11:30,311 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 01:11:30,344 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 121 places, 121 transitions, 250 flow [2024-11-09 01:11:31,070 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13707 states, 13671 states have (on average 3.1548533391851366) internal successors, (43130), 13706 states have internal predecessors, (43130), 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) [2024-11-09 01:11:31,105 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:11:31,112 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;@b45e7f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:11:31,113 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-09 01:11:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 13707 states, 13671 states have (on average 3.1548533391851366) internal successors, (43130), 13706 states have internal predecessors, (43130), 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) [2024-11-09 01:11:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 01:11:31,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:31,168 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:31,169 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr2Err0ASSERT_VIOLATIONDATA_RACE, thr2Err1ASSERT_VIOLATIONDATA_RACE, thr2Err2ASSERT_VIOLATIONDATA_RACE, thr2Err3ASSERT_VIOLATIONDATA_RACE (and 16 more)] === [2024-11-09 01:11:31,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1290977940, now seen corresponding path program 1 times [2024-11-09 01:11:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:31,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683110850] [2024-11-09 01:11:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:31,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:31,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683110850] [2024-11-09 01:11:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683110850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:11:31,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:11:31,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:11:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586995761] [2024-11-09 01:11:31,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:11:31,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:11:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:11:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:11:31,634 INFO L87 Difference]: Start difference. First operand has 13707 states, 13671 states have (on average 3.1548533391851366) internal successors, (43130), 13706 states have internal predecessors, (43130), 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) Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-11-09 01:11:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:32,435 INFO L93 Difference]: Finished difference Result 22228 states and 73359 transitions. [2024-11-09 01:11:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:11:32,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 27 [2024-11-09 01:11:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:32,629 INFO L225 Difference]: With dead ends: 22228 [2024-11-09 01:11:32,629 INFO L226 Difference]: Without dead ends: 9021 [2024-11-09 01:11:32,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:11:32,671 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 72 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:32,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 190 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:11:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9021 states. [2024-11-09 01:11:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9021 to 6353. [2024-11-09 01:11:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6353 states, 6343 states have (on average 2.8402963897209523) internal successors, (18016), 6352 states have internal predecessors, (18016), 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) [2024-11-09 01:11:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6353 states to 6353 states and 18016 transitions. [2024-11-09 01:11:33,210 INFO L78 Accepts]: Start accepts. Automaton has 6353 states and 18016 transitions. Word has length 27 [2024-11-09 01:11:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:33,210 INFO L471 AbstractCegarLoop]: Abstraction has 6353 states and 18016 transitions. [2024-11-09 01:11:33,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-11-09 01:11:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6353 states and 18016 transitions. [2024-11-09 01:11:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 01:11:33,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:33,216 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:33,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:11:33,217 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0ASSERT_VIOLATIONDATA_RACE, thr2Err1ASSERT_VIOLATIONDATA_RACE, thr2Err2ASSERT_VIOLATIONDATA_RACE, thr2Err3ASSERT_VIOLATIONDATA_RACE (and 16 more)] === [2024-11-09 01:11:33,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash -787264590, now seen corresponding path program 1 times [2024-11-09 01:11:33,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272222877] [2024-11-09 01:11:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 01:11:33,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 01:11:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 01:11:33,290 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 01:11:33,290 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 01:11:33,292 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 20 remaining) [2024-11-09 01:11:33,294 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (18 of 20 remaining) [2024-11-09 01:11:33,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (17 of 20 remaining) [2024-11-09 01:11:33,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (16 of 20 remaining) [2024-11-09 01:11:33,295 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (15 of 20 remaining) [2024-11-09 01:11:33,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (14 of 20 remaining) [2024-11-09 01:11:33,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (13 of 20 remaining) [2024-11-09 01:11:33,296 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (12 of 20 remaining) [2024-11-09 01:11:33,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (11 of 20 remaining) [2024-11-09 01:11:33,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (10 of 20 remaining) [2024-11-09 01:11:33,297 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 20 remaining) [2024-11-09 01:11:33,298 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (8 of 20 remaining) [2024-11-09 01:11:33,298 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (7 of 20 remaining) [2024-11-09 01:11:33,298 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (6 of 20 remaining) [2024-11-09 01:11:33,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (5 of 20 remaining) [2024-11-09 01:11:33,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (4 of 20 remaining) [2024-11-09 01:11:33,299 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (3 of 20 remaining) [2024-11-09 01:11:33,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (2 of 20 remaining) [2024-11-09 01:11:33,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (1 of 20 remaining) [2024-11-09 01:11:33,300 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (0 of 20 remaining) [2024-11-09 01:11:33,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:11:33,304 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-09 01:11:33,306 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 01:11:33,306 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 01:11:33,361 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 01:11:33,366 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 206 places, 207 transitions, 434 flow [2024-11-09 01:12:04,220 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 868905 states, 868564 states have (on average 4.154100331121253) internal successors, (3608102), 868904 states have internal predecessors, (3608102), 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) [2024-11-09 01:12:04,222 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:12:04,228 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;@b45e7f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:12:04,228 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-09 01:12:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 868905 states, 868564 states have (on average 4.154100331121253) internal successors, (3608102), 868904 states have internal predecessors, (3608102), 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) [2024-11-09 01:12:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 01:12:05,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:05,640 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:05,640 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr2Err0ASSERT_VIOLATIONDATA_RACE, thr2Err1ASSERT_VIOLATIONDATA_RACE, thr2Err2ASSERT_VIOLATIONDATA_RACE, thr2Err3ASSERT_VIOLATIONDATA_RACE (and 25 more)] === [2024-11-09 01:12:05,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1243441976, now seen corresponding path program 1 times [2024-11-09 01:12:05,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:05,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584076386] [2024-11-09 01:12:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:05,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:05,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584076386] [2024-11-09 01:12:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584076386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:12:05,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:12:05,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:12:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163645069] [2024-11-09 01:12:05,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:12:05,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:12:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:12:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:12:06,796 INFO L87 Difference]: Start difference. First operand has 868905 states, 868564 states have (on average 4.154100331121253) internal successors, (3608102), 868904 states have internal predecessors, (3608102), 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) Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 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)