./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2 --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 3a211ea3558de7a91964968ab789e94c34171c05a0686de6a2a53ff72a198e9d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:21:25,737 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:21:25,836 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:21:25,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:21:25,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:21:25,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:21:25,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:21:25,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:21:25,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:21:25,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:21:25,866 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:21:25,866 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:21:25,867 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:21:25,867 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:21:25,868 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:21:25,868 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:21:25,868 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:21:25,869 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:21:25,869 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:21:25,869 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:21:25,870 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:21:25,870 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:21:25,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:21:25,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:21:25,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:21:25,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:21:25,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:21:25,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:21:25,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:21:25,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:21:25,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:21:25,874 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:21:25,875 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:21:25,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:21:25,875 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:21:25,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:21:25,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:21:25,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:21:25,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:25,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:21:25,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:21:25,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:21:25,878 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:21:25,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:21:25,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:21:25,879 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:21:25,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:21:25,879 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_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a211ea3558de7a91964968ab789e94c34171c05a0686de6a2a53ff72a198e9d [2024-11-02 11:21:26,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:21:26,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:21:26,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:21:26,214 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:21:26,215 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:21:26,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c Unable to find full path for "g++" [2024-11-02 11:21:28,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:21:28,583 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:21:28,584 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c [2024-11-02 11:21:28,597 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/data/15f08a28c/946a4e8ecc2e453bb2ef8c3201e9101e/FLAG4f346a759 [2024-11-02 11:21:28,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/data/15f08a28c/946a4e8ecc2e453bb2ef8c3201e9101e [2024-11-02 11:21:28,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:21:28,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:21:28,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:28,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:21:28,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:21:28,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:28" (1/1) ... [2024-11-02 11:21:28,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbbe7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:28, skipping insertion in model container [2024-11-02 11:21:28,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:28" (1/1) ... [2024-11-02 11:21:28,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:21:29,089 WARN L251 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_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c[11718,11731] [2024-11-02 11:21:29,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:29,172 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:21:29,185 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [49] [2024-11-02 11:21:29,187 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [78] [2024-11-02 11:21:29,187 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [444] [2024-11-02 11:21:29,188 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [453] [2024-11-02 11:21:29,188 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [557] [2024-11-02 11:21:29,188 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [783] [2024-11-02 11:21:29,188 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [877] [2024-11-02 11:21:29,189 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [946] [2024-11-02 11:21:29,238 WARN L251 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_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c[11718,11731] [2024-11-02 11:21:29,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:29,310 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:21:29,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29 WrapperNode [2024-11-02 11:21:29,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:29,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:29,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:21:29,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:21:29,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,367 INFO L138 Inliner]: procedures = 56, calls = 102, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 212 [2024-11-02 11:21:29,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:29,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:21:29,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:21:29,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:21:29,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,389 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:21:29,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:21:29,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:21:29,403 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:21:29,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (1/1) ... [2024-11-02 11:21:29,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:29,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:29,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:21:29,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:21:29,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:21:29,486 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2024-11-02 11:21:29,487 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2024-11-02 11:21:29,487 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 11:21:29,487 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 11:21:29,487 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 11:21:29,487 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 11:21:29,487 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2024-11-02 11:21:29,487 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2024-11-02 11:21:29,488 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2024-11-02 11:21:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2024-11-02 11:21:29,488 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2024-11-02 11:21:29,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2024-11-02 11:21:29,488 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2024-11-02 11:21:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2024-11-02 11:21:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:21:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2024-11-02 11:21:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2024-11-02 11:21:29,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:21:29,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:21:29,574 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:21:29,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:21:29,907 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-02 11:21:29,907 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:21:30,025 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:21:30,025 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 11:21:30,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:30 BoogieIcfgContainer [2024-11-02 11:21:30,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:21:30,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:21:30,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:21:30,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:21:30,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:21:28" (1/3) ... [2024-11-02 11:21:30,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d24489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:30, skipping insertion in model container [2024-11-02 11:21:30,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:29" (2/3) ... [2024-11-02 11:21:30,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d24489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:30, skipping insertion in model container [2024-11-02 11:21:30,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:30" (3/3) ... [2024-11-02 11:21:30,035 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product48.cil.c [2024-11-02 11:21:30,055 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:21:30,055 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:21:30,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:21:30,123 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;@bce41f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:21:30,123 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:21:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-02 11:21:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:21:30,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:30,137 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:30,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:30,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -289500014, now seen corresponding path program 1 times [2024-11-02 11:21:30,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:30,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011529132] [2024-11-02 11:21:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:30,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011529132] [2024-11-02 11:21:30,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011529132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:30,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:30,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:30,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697202885] [2024-11-02 11:21:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:30,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 11:21:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 11:21:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:21:30,468 INFO L87 Difference]: Start difference. First operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:30,585 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2024-11-02 11:21:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 11:21:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 11:21:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:30,598 INFO L225 Difference]: With dead ends: 128 [2024-11-02 11:21:30,599 INFO L226 Difference]: Without dead ends: 60 [2024-11-02 11:21:30,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:21:30,611 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:30,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:30,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-02 11:21:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-02 11:21:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-02 11:21:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2024-11-02 11:21:30,666 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2024-11-02 11:21:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:30,666 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2024-11-02 11:21:30,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2024-11-02 11:21:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 11:21:30,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:30,669 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:30,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:21:30,670 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:30,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1384556814, now seen corresponding path program 1 times [2024-11-02 11:21:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:30,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886635166] [2024-11-02 11:21:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:30,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886635166] [2024-11-02 11:21:30,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886635166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:30,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:30,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852841090] [2024-11-02 11:21:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:30,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:30,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:30,810 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:30,870 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2024-11-02 11:21:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 11:21:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:30,872 INFO L225 Difference]: With dead ends: 92 [2024-11-02 11:21:30,872 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 11:21:30,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:30,874 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:30,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:21:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 11:21:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-02 11:21:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-02 11:21:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-02 11:21:30,884 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 13 [2024-11-02 11:21:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:30,884 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-02 11:21:30,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-02 11:21:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 11:21:30,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:30,887 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:30,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:21:30,887 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:30,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1374556306, now seen corresponding path program 1 times [2024-11-02 11:21:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587025048] [2024-11-02 11:21:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:31,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587025048] [2024-11-02 11:21:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587025048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:31,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:31,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370473706] [2024-11-02 11:21:31,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:31,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:31,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:31,031 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:31,159 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2024-11-02 11:21:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-02 11:21:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:31,163 INFO L225 Difference]: With dead ends: 152 [2024-11-02 11:21:31,163 INFO L226 Difference]: Without dead ends: 102 [2024-11-02 11:21:31,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:31,167 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:31,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 107 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-02 11:21:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2024-11-02 11:21:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 77 states have internal predecessors, (85), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 15 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-02 11:21:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2024-11-02 11:21:31,205 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 16 [2024-11-02 11:21:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:31,205 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2024-11-02 11:21:31,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2024-11-02 11:21:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 11:21:31,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:31,207 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:31,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:21:31,207 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:31,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1889322964, now seen corresponding path program 1 times [2024-11-02 11:21:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:31,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082992102] [2024-11-02 11:21:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:31,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:31,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082992102] [2024-11-02 11:21:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082992102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:31,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:31,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179707673] [2024-11-02 11:21:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:31,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:31,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:31,332 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:31,443 INFO L93 Difference]: Finished difference Result 262 states and 349 transitions. [2024-11-02 11:21:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-02 11:21:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:31,446 INFO L225 Difference]: With dead ends: 262 [2024-11-02 11:21:31,446 INFO L226 Difference]: Without dead ends: 165 [2024-11-02 11:21:31,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:21:31,449 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:31,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 137 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-02 11:21:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2024-11-02 11:21:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.311926605504587) internal successors, (143), 124 states have internal predecessors, (143), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (36), 25 states have call predecessors, (36), 28 states have call successors, (36) [2024-11-02 11:21:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 207 transitions. [2024-11-02 11:21:31,475 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 207 transitions. Word has length 19 [2024-11-02 11:21:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:31,476 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 207 transitions. [2024-11-02 11:21:31,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:21:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 207 transitions. [2024-11-02 11:21:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:21:31,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:31,477 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, 1] [2024-11-02 11:21:31,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:21:31,478 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:31,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 302249684, now seen corresponding path program 1 times [2024-11-02 11:21:31,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:31,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704250314] [2024-11-02 11:21:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:31,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704250314] [2024-11-02 11:21:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704250314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:31,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 11:21:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078596140] [2024-11-02 11:21:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:31,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:21:31,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:31,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:21:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:21:31,696 INFO L87 Difference]: Start difference. First operand 164 states and 207 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:21:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:31,902 INFO L93 Difference]: Finished difference Result 454 states and 573 transitions. [2024-11-02 11:21:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:21:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 11:21:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:31,912 INFO L225 Difference]: With dead ends: 454 [2024-11-02 11:21:31,912 INFO L226 Difference]: Without dead ends: 292 [2024-11-02 11:21:31,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-02 11:21:31,919 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:31,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 188 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-02 11:21:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2024-11-02 11:21:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 191 states have (on average 1.2827225130890052) internal successors, (245), 215 states have internal predecessors, (245), 45 states have call successors, (45), 43 states have call predecessors, (45), 47 states have return successors, (57), 46 states have call predecessors, (57), 45 states have call successors, (57) [2024-11-02 11:21:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2024-11-02 11:21:31,993 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 28 [2024-11-02 11:21:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:31,994 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2024-11-02 11:21:31,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:21:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2024-11-02 11:21:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:21:31,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:32,000 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2024-11-02 11:21:32,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:21:32,000 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:32,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1707114910, now seen corresponding path program 1 times [2024-11-02 11:21:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330450138] [2024-11-02 11:21:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:32,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330450138] [2024-11-02 11:21:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330450138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:32,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:32,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:21:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538131660] [2024-11-02 11:21:32,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:32,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:32,131 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:21:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:32,308 INFO L93 Difference]: Finished difference Result 477 states and 585 transitions. [2024-11-02 11:21:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2024-11-02 11:21:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:32,311 INFO L225 Difference]: With dead ends: 477 [2024-11-02 11:21:32,311 INFO L226 Difference]: Without dead ends: 195 [2024-11-02 11:21:32,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:32,313 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 83 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:32,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-02 11:21:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2024-11-02 11:21:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 148 states have internal predecessors, (166), 29 states have call successors, (29), 28 states have call predecessors, (29), 30 states have return successors, (35), 30 states have call predecessors, (35), 29 states have call successors, (35) [2024-11-02 11:21:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 230 transitions. [2024-11-02 11:21:32,341 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 230 transitions. Word has length 46 [2024-11-02 11:21:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:32,341 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 230 transitions. [2024-11-02 11:21:32,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:21:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 230 transitions. [2024-11-02 11:21:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 11:21:32,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:32,344 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:32,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:21:32,344 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:32,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash -321666734, now seen corresponding path program 1 times [2024-11-02 11:21:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:32,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216501966] [2024-11-02 11:21:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:21:32,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:32,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216501966] [2024-11-02 11:21:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216501966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295710309] [2024-11-02 11:21:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:32,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:32,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:32,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:21:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:32,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 11:21:32,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 11:21:33,018 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:21:33,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295710309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:33,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:21:33,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-02 11:21:33,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089955329] [2024-11-02 11:21:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:33,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:21:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:21:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-02 11:21:33,024 INFO L87 Difference]: Start difference. First operand 191 states and 230 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 11:21:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:33,216 INFO L93 Difference]: Finished difference Result 329 states and 407 transitions. [2024-11-02 11:21:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:21:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2024-11-02 11:21:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:33,219 INFO L225 Difference]: With dead ends: 329 [2024-11-02 11:21:33,219 INFO L226 Difference]: Without dead ends: 224 [2024-11-02 11:21:33,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-02 11:21:33,221 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 29 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:33,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 253 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-02 11:21:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2024-11-02 11:21:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 148 states have (on average 1.2702702702702702) internal successors, (188), 167 states have internal predecessors, (188), 32 states have call successors, (32), 31 states have call predecessors, (32), 35 states have return successors, (40), 34 states have call predecessors, (40), 32 states have call successors, (40) [2024-11-02 11:21:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 260 transitions. [2024-11-02 11:21:33,255 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 260 transitions. Word has length 54 [2024-11-02 11:21:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:33,256 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 260 transitions. [2024-11-02 11:21:33,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 11:21:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 260 transitions. [2024-11-02 11:21:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-02 11:21:33,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:33,259 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 11:21:33,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:21:33,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:33,461 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:33,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -241212271, now seen corresponding path program 1 times [2024-11-02 11:21:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121802093] [2024-11-02 11:21:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:21:33,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:33,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121802093] [2024-11-02 11:21:33,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121802093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:33,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044877833] [2024-11-02 11:21:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:33,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:33,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:21:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:34,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:21:34,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:34,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:21:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044877833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:21:34,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-11-02 11:21:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291949196] [2024-11-02 11:21:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:34,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:21:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:21:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-02 11:21:34,381 INFO L87 Difference]: Start difference. First operand 216 states and 260 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-02 11:21:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:34,966 INFO L93 Difference]: Finished difference Result 526 states and 650 transitions. [2024-11-02 11:21:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 11:21:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2024-11-02 11:21:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:34,973 INFO L225 Difference]: With dead ends: 526 [2024-11-02 11:21:34,973 INFO L226 Difference]: Without dead ends: 312 [2024-11-02 11:21:34,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-02 11:21:34,975 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:34,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 214 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:21:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-02 11:21:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 298. [2024-11-02 11:21:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 213 states have (on average 1.267605633802817) internal successors, (270), 234 states have internal predecessors, (270), 42 states have call successors, (42), 41 states have call predecessors, (42), 42 states have return successors, (51), 42 states have call predecessors, (51), 42 states have call successors, (51) [2024-11-02 11:21:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 363 transitions. [2024-11-02 11:21:35,030 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 363 transitions. Word has length 57 [2024-11-02 11:21:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:35,031 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 363 transitions. [2024-11-02 11:21:35,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-02 11:21:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 363 transitions. [2024-11-02 11:21:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 11:21:35,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:35,034 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2024-11-02 11:21:35,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:21:35,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:35,235 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:35,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1961938232, now seen corresponding path program 1 times [2024-11-02 11:21:35,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:35,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864600670] [2024-11-02 11:21:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:35,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:21:35,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864600670] [2024-11-02 11:21:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864600670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129398786] [2024-11-02 11:21:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:35,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:35,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:21:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:35,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-02 11:21:35,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:36,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:21:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:21:36,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129398786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:21:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971411272] [2024-11-02 11:21:36,769 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-02 11:21:36,769 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:21:36,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:21:36,779 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:21:36,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:21:46,577 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 13 for LOIs [2024-11-02 11:21:46,581 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 152 for LOIs [2024-11-02 11:21:49,436 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 3 for LOIs [2024-11-02 11:21:49,474 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 24 for LOIs [2024-11-02 11:21:49,479 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 8 for LOIs [2024-11-02 11:21:49,484 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:21:55,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6505#(and (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= 1 ~systemActive~0) (<= 0 (+ ~pumpRunning~0 2147483648)) (= ~waterLevel~0 0))' at error location [2024-11-02 11:21:55,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:21:55,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:21:55,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 22 [2024-11-02 11:21:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055499361] [2024-11-02 11:21:55,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:21:55,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-02 11:21:55,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-02 11:21:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2155, Unknown=0, NotChecked=0, Total=2450 [2024-11-02 11:21:55,848 INFO L87 Difference]: Start difference. First operand 298 states and 363 transitions. Second operand has 22 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 10 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-02 11:21:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:57,778 INFO L93 Difference]: Finished difference Result 818 states and 1036 transitions. [2024-11-02 11:21:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-02 11:21:57,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 10 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 60 [2024-11-02 11:21:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:57,784 INFO L225 Difference]: With dead ends: 818 [2024-11-02 11:21:57,784 INFO L226 Difference]: Without dead ends: 642 [2024-11-02 11:21:57,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 141 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1178, Invalid=6304, Unknown=0, NotChecked=0, Total=7482 [2024-11-02 11:21:57,791 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 705 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:57,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 372 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 11:21:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-11-02 11:21:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 588. [2024-11-02 11:21:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 423 states have (on average 1.260047281323877) internal successors, (533), 462 states have internal predecessors, (533), 82 states have call successors, (82), 76 states have call predecessors, (82), 82 states have return successors, (109), 84 states have call predecessors, (109), 82 states have call successors, (109) [2024-11-02 11:21:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 724 transitions. [2024-11-02 11:21:57,869 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 724 transitions. Word has length 60 [2024-11-02 11:21:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:57,872 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 724 transitions. [2024-11-02 11:21:57,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 10 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-02 11:21:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 724 transitions. [2024-11-02 11:21:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-02 11:21:57,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:57,875 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:21:57,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea32bdd9-a372-49b2-9ca7-d56c99ee6e72/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0