./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/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 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:38:33,366 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:38:33,441 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:38:33,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:38:33,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:38:33,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:38:33,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:38:33,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:38:33,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:38:33,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:38:33,476 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:38:33,477 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:38:33,477 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:38:33,477 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:38:33,478 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:38:33,478 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:38:33,479 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:38:33,479 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:38:33,480 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:38:33,480 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:38:33,481 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:38:33,487 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:38:33,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:38:33,489 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:38:33,489 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:38:33,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:38:33,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:38:33,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:38:33,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:38:33,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:38:33,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:38:33,495 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:38:33,496 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:38:33,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:38:33,496 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:38:33,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:38:33,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:38:33,500 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:38:33,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:33,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:38:33,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:38:33,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:38:33,502 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:38:33,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:38:33,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:38:33,504 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:38:33,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:38:33,505 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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45558e1c10008e5b16efe572a84fcf92b08797f54d586c51d45827b7e38254a6 [2024-11-02 12:38:33,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:38:33,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:38:33,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:38:33,811 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:38:33,812 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:38:33,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c Unable to find full path for "g++" [2024-11-02 12:38:36,302 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:38:36,730 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:38:36,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c [2024-11-02 12:38:36,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/data/fc3f9661a/500dfcbe9f24485c8171ef965b9795df/FLAG8228c8fd3 [2024-11-02 12:38:36,770 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/data/fc3f9661a/500dfcbe9f24485c8171ef965b9795df [2024-11-02 12:38:36,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:38:36,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:38:36,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:36,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:38:36,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:38:36,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:36" (1/1) ... [2024-11-02 12:38:36,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bf059c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:36, skipping insertion in model container [2024-11-02 12:38:36,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:36" (1/1) ... [2024-11-02 12:38:36,844 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:38:37,271 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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2024-11-02 12:38:37,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:37,408 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:38:37,421 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] [2024-11-02 12:38:37,423 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [153] [2024-11-02 12:38:37,423 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [190] [2024-11-02 12:38:37,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [530] [2024-11-02 12:38:37,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [607] [2024-11-02 12:38:37,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [616] [2024-11-02 12:38:37,424 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [982] [2024-11-02 12:38:37,425 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1085] [2024-11-02 12:38:37,478 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_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/sv-benchmarks/c/product-lines/minepump_spec4_productSimulator.cil.c[9333,9346] [2024-11-02 12:38:37,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:37,547 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:38:37,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37 WrapperNode [2024-11-02 12:38:37,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:37,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:37,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:38:37,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:38:37,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,612 INFO L138 Inliner]: procedures = 63, calls = 121, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 298 [2024-11-02 12:38:37,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:37,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:38:37,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:38:37,615 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:38:37,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,670 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:38:37,675 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:38:37,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:38:37,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:38:37,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:37,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:37,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:38:37,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:38:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:38:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2024-11-02 12:38:37,800 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2024-11-02 12:38:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:38:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:38:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:38:37,801 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:38:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2024-11-02 12:38:37,802 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2024-11-02 12:38:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2024-11-02 12:38:37,802 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2024-11-02 12:38:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2024-11-02 12:38:37,802 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2024-11-02 12:38:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2024-11-02 12:38:37,803 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2024-11-02 12:38:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2024-11-02 12:38:37,803 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2024-11-02 12:38:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2024-11-02 12:38:37,804 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2024-11-02 12:38:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:38:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2024-11-02 12:38:37,804 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2024-11-02 12:38:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2024-11-02 12:38:37,805 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2024-11-02 12:38:37,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:38:37,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:38:37,907 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:38:37,910 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:38:38,639 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-02 12:38:38,643 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:38:38,851 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:38:38,854 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:38:38,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:38 BoogieIcfgContainer [2024-11-02 12:38:38,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:38:38,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:38:38,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:38:38,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:38:38,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:38:36" (1/3) ... [2024-11-02 12:38:38,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b434c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:38, skipping insertion in model container [2024-11-02 12:38:38,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (2/3) ... [2024-11-02 12:38:38,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b434c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:38, skipping insertion in model container [2024-11-02 12:38:38,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:38" (3/3) ... [2024-11-02 12:38:38,868 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_productSimulator.cil.c [2024-11-02 12:38:38,893 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:38:38,893 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:38:39,005 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:38:39,012 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;@121326df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:38:39,012 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:38:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 78 states have internal predecessors, (88), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-02 12:38:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:38:39,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:39,030 INFO L215 NwaCegarLoop]: trace histogram [6, 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 12:38:39,030 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:39,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 481802910, now seen corresponding path program 1 times [2024-11-02 12:38:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113962699] [2024-11-02 12:38:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:39,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:39,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113962699] [2024-11-02 12:38:39,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113962699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:39,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:39,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:38:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284645909] [2024-11-02 12:38:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:39,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:38:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:38:39,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:38:39,535 INFO L87 Difference]: Start difference. First operand has 103 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 78 states have internal predecessors, (88), 28 states have call successors, (28), 11 states have call predecessors, (28), 11 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:39,656 INFO L93 Difference]: Finished difference Result 190 states and 270 transitions. [2024-11-02 12:38:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:38:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-11-02 12:38:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:39,673 INFO L225 Difference]: With dead ends: 190 [2024-11-02 12:38:39,674 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 12:38:39,678 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 12:38:39,686 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:39,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 12:38:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-02 12:38:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 74 states have internal predecessors, (80), 28 states have call successors, (28), 11 states have call predecessors, (28), 10 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-02 12:38:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2024-11-02 12:38:39,761 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 36 [2024-11-02 12:38:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:39,765 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2024-11-02 12:38:39,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2024-11-02 12:38:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 12:38:39,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:39,768 INFO L215 NwaCegarLoop]: trace histogram [6, 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 12:38:39,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:38:39,769 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:39,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1503503775, now seen corresponding path program 1 times [2024-11-02 12:38:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812753413] [2024-11-02 12:38:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:39,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:39,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812753413] [2024-11-02 12:38:39,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812753413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:39,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:39,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:38:39,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846022667] [2024-11-02 12:38:39,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:39,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:38:39,979 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:40,097 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2024-11-02 12:38:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2024-11-02 12:38:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:40,102 INFO L225 Difference]: With dead ends: 153 [2024-11-02 12:38:40,103 INFO L226 Difference]: Without dead ends: 90 [2024-11-02 12:38:40,106 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 12:38:40,107 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:40,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-02 12:38:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-02 12:38:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 69 states have internal predecessors, (74), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-02 12:38:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2024-11-02 12:38:40,139 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 37 [2024-11-02 12:38:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:40,140 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2024-11-02 12:38:40,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2024-11-02 12:38:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 12:38:40,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:40,143 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 1, 1] [2024-11-02 12:38:40,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:38:40,143 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:40,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1430445293, now seen corresponding path program 1 times [2024-11-02 12:38:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:40,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272061486] [2024-11-02 12:38:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:40,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:40,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:40,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272061486] [2024-11-02 12:38:40,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272061486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:40,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:40,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:38:40,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936278253] [2024-11-02 12:38:40,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:40,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:38:40,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:38:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:38:40,504 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:40,703 INFO L93 Difference]: Finished difference Result 211 states and 306 transitions. [2024-11-02 12:38:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:38:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-02 12:38:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:40,709 INFO L225 Difference]: With dead ends: 211 [2024-11-02 12:38:40,710 INFO L226 Difference]: Without dead ends: 137 [2024-11-02 12:38:40,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 12:38:40,716 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 78 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:40,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 276 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-02 12:38:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-02 12:38:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 105 states have internal predecessors, (118), 31 states have call successors, (31), 17 states have call predecessors, (31), 17 states have return successors, (41), 29 states have call predecessors, (41), 31 states have call successors, (41) [2024-11-02 12:38:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 190 transitions. [2024-11-02 12:38:40,758 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 190 transitions. Word has length 40 [2024-11-02 12:38:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:40,758 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 190 transitions. [2024-11-02 12:38:40,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:38:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 190 transitions. [2024-11-02 12:38:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-02 12:38:40,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:40,763 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:40,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:38:40,764 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:40,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash 999402301, now seen corresponding path program 1 times [2024-11-02 12:38:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358940237] [2024-11-02 12:38:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:41,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358940237] [2024-11-02 12:38:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358940237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:41,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:41,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:38:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930124618] [2024-11-02 12:38:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:41,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:38:41,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:38:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:38:41,217 INFO L87 Difference]: Start difference. First operand 137 states and 190 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-02 12:38:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:41,608 INFO L93 Difference]: Finished difference Result 372 states and 528 transitions. [2024-11-02 12:38:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:38:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2024-11-02 12:38:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:41,617 INFO L225 Difference]: With dead ends: 372 [2024-11-02 12:38:41,618 INFO L226 Difference]: Without dead ends: 251 [2024-11-02 12:38:41,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:38:41,624 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 145 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:41,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 342 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:38:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-02 12:38:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 211. [2024-11-02 12:38:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 142 states have (on average 1.3380281690140845) internal successors, (190), 164 states have internal predecessors, (190), 41 states have call successors, (41), 24 states have call predecessors, (41), 27 states have return successors, (56), 43 states have call predecessors, (56), 41 states have call successors, (56) [2024-11-02 12:38:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 287 transitions. [2024-11-02 12:38:41,684 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 287 transitions. Word has length 58 [2024-11-02 12:38:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:41,685 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 287 transitions. [2024-11-02 12:38:41,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-02 12:38:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 287 transitions. [2024-11-02 12:38:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-02 12:38:41,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:41,691 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 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 12:38:41,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:38:41,695 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:41,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2017479496, now seen corresponding path program 1 times [2024-11-02 12:38:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:41,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199393110] [2024-11-02 12:38:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:42,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199393110] [2024-11-02 12:38:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199393110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:42,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:38:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933924125] [2024-11-02 12:38:42,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:42,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:38:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:38:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:38:42,120 INFO L87 Difference]: Start difference. First operand 211 states and 287 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:38:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:42,822 INFO L93 Difference]: Finished difference Result 504 states and 689 transitions. [2024-11-02 12:38:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:38:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2024-11-02 12:38:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:42,826 INFO L225 Difference]: With dead ends: 504 [2024-11-02 12:38:42,827 INFO L226 Difference]: Without dead ends: 354 [2024-11-02 12:38:42,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:38:42,829 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 317 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:42,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 329 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:38:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-02 12:38:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2024-11-02 12:38:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 229 states have (on average 1.3275109170305677) internal successors, (304), 265 states have internal predecessors, (304), 62 states have call successors, (62), 36 states have call predecessors, (62), 44 states have return successors, (89), 70 states have call predecessors, (89), 62 states have call successors, (89) [2024-11-02 12:38:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 455 transitions. [2024-11-02 12:38:42,872 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 455 transitions. Word has length 61 [2024-11-02 12:38:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:42,873 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 455 transitions. [2024-11-02 12:38:42,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:38:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 455 transitions. [2024-11-02 12:38:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-02 12:38:42,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:42,880 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:42,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:38:42,880 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:42,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:42,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1075705730, now seen corresponding path program 1 times [2024-11-02 12:38:42,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:42,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649428585] [2024-11-02 12:38:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:42,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:42,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649428585] [2024-11-02 12:38:42,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649428585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:42,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:38:42,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097592426] [2024-11-02 12:38:42,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:42,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:42,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:38:42,995 INFO L87 Difference]: Start difference. First operand 336 states and 455 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-02 12:38:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:43,105 INFO L93 Difference]: Finished difference Result 727 states and 990 transitions. [2024-11-02 12:38:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 75 [2024-11-02 12:38:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:43,109 INFO L225 Difference]: With dead ends: 727 [2024-11-02 12:38:43,109 INFO L226 Difference]: Without dead ends: 407 [2024-11-02 12:38:43,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 12:38:43,111 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:43,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:38:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-02 12:38:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 401. [2024-11-02 12:38:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 278 states have (on average 1.3237410071942446) internal successors, (368), 319 states have internal predecessors, (368), 70 states have call successors, (70), 44 states have call predecessors, (70), 52 states have return successors, (102), 78 states have call predecessors, (102), 70 states have call successors, (102) [2024-11-02 12:38:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 540 transitions. [2024-11-02 12:38:43,178 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 540 transitions. Word has length 75 [2024-11-02 12:38:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:43,179 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 540 transitions. [2024-11-02 12:38:43,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-02 12:38:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 540 transitions. [2024-11-02 12:38:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-02 12:38:43,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:43,182 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 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, 1, 1, 1, 1] [2024-11-02 12:38:43,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:38:43,183 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:43,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash 416501273, now seen corresponding path program 1 times [2024-11-02 12:38:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:43,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759428087] [2024-11-02 12:38:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 12:38:43,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:43,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759428087] [2024-11-02 12:38:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759428087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:43,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190710752] [2024-11-02 12:38:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:43,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:43,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:43,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:38:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:43,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:38:43,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:43,544 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190710752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:43,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:43,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-11-02 12:38:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355905651] [2024-11-02 12:38:43,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:43,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:38:43,550 INFO L87 Difference]: Start difference. First operand 401 states and 540 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:38:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:43,708 INFO L93 Difference]: Finished difference Result 908 states and 1264 transitions. [2024-11-02 12:38:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2024-11-02 12:38:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:43,715 INFO L225 Difference]: With dead ends: 908 [2024-11-02 12:38:43,715 INFO L226 Difference]: Without dead ends: 523 [2024-11-02 12:38:43,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 89 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 12:38:43,717 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 68 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:43,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 215 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-11-02 12:38:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2024-11-02 12:38:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 368 states have (on average 1.315217391304348) internal successors, (484), 415 states have internal predecessors, (484), 86 states have call successors, (86), 60 states have call predecessors, (86), 68 states have return successors, (138), 94 states have call predecessors, (138), 86 states have call successors, (138) [2024-11-02 12:38:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 708 transitions. [2024-11-02 12:38:43,796 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 708 transitions. Word has length 88 [2024-11-02 12:38:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:43,797 INFO L471 AbstractCegarLoop]: Abstraction has 523 states and 708 transitions. [2024-11-02 12:38:43,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-02 12:38:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 708 transitions. [2024-11-02 12:38:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-02 12:38:43,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:43,800 INFO L215 NwaCegarLoop]: trace histogram [6, 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, 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, 1, 1] [2024-11-02 12:38:43,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:38:44,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:38:44,005 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:44,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1473600701, now seen corresponding path program 1 times [2024-11-02 12:38:44,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:44,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055368311] [2024-11-02 12:38:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:44,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:44,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055368311] [2024-11-02 12:38:44,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055368311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383734778] [2024-11-02 12:38:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:44,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:44,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f908af89-543d-4ae7-9e1c-e80d20dbf9c1/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:38:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:44,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-02 12:38:44,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:38:45,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-02 12:38:45,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383734778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2066196977] [2024-11-02 12:38:45,716 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-02 12:38:45,717 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:45,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:45,734 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:45,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:53,332 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 156 for LOIs [2024-11-02 12:38:53,418 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2024-11-02 12:38:53,509 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 29 for LOIs [2024-11-02 12:38:53,537 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 146 for LOIs [2024-11-02 12:38:53,635 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 27 for LOIs [2024-11-02 12:38:53,741 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 36 for LOIs [2024-11-02 12:38:53,747 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__highWaterSensor with input of size 30 for LOIs [2024-11-02 12:38:53,750 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:04,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8025#(and (not (= ~pumpRunning~0 0)) (<= ~pumpRunning~0 2147483647) (= ~__SELECTED_FEATURE_methaneAlarm~0 0) (<= 0 (+ ~pumpRunning~0 2147483648)) (= ~waterLevel~0 0) (= ~__SELECTED_FEATURE_lowWaterSensor~0 0))' at error location [2024-11-02 12:39:04,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:04,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:04,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 18 [2024-11-02 12:39:04,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778633015] [2024-11-02 12:39:04,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:04,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 12:39:04,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 12:39:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=3172, Unknown=0, NotChecked=0, Total=3540 [2024-11-02 12:39:04,022 INFO L87 Difference]: Start difference. First operand 523 states and 708 transitions. Second operand has 18 states, 17 states have (on average 6.823529411764706) internal successors, (116), 15 states have internal predecessors, (116), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34)