./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ --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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:33,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:33,475 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:12:33,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:33,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:33,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:33,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:33,542 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:33,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:33,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:33,550 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:33,551 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:33,552 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:33,554 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:33,555 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:33,555 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:33,556 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:33,556 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:33,557 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:33,557 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:33,558 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:33,558 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:33,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:33,562 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:33,562 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:33,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:33,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:33,564 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:33,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:33,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:33,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:33,567 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:33,567 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:33,567 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:33,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:33,568 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:33,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:33,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:33,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:33,569 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:33,569 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:33,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:33,570 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:33,570 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:33,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:33,571 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_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2023-11-19 05:12:33,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:33,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:33,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:33,950 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:33,950 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:33,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2023-11-19 05:12:37,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:37,907 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:37,910 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2023-11-19 05:12:37,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/data/dcd4fad74/f28e10a1e64146658e7fe83e0ab2eaee/FLAGc5f87664e [2023-11-19 05:12:37,946 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/data/dcd4fad74/f28e10a1e64146658e7fe83e0ab2eaee [2023-11-19 05:12:37,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:37,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:37,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:37,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:37,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:37,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:37" (1/1) ... [2023-11-19 05:12:37,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337df723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:37, skipping insertion in model container [2023-11-19 05:12:37,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:37" (1/1) ... [2023-11-19 05:12:38,025 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:38,304 WARN L240 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_05ef7e86-f858-449f-a5ed-f22eb98196a3/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2023-11-19 05:12:38,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:38,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:38,487 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [49] [2023-11-19 05:12:38,489 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [168] [2023-11-19 05:12:38,490 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [272] [2023-11-19 05:12:38,490 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [317] [2023-11-19 05:12:38,490 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [326] [2023-11-19 05:12:38,491 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [692] [2023-11-19 05:12:38,491 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [771] [2023-11-19 05:12:38,492 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [1110] [2023-11-19 05:12:38,543 WARN L240 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_05ef7e86-f858-449f-a5ed-f22eb98196a3/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2023-11-19 05:12:38,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:38,703 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:38,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38 WrapperNode [2023-11-19 05:12:38,704 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:38,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:38,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:38,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:38,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,785 INFO L138 Inliner]: procedures = 65, calls = 124, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 303 [2023-11-19 05:12:38,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:38,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:38,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:38,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:38,801 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,826 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:38,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:38,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:38,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:38,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (1/1) ... [2023-11-19 05:12:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:38,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:38,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2023-11-19 05:12:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2023-11-19 05:12:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:12:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:12:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:12:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:12:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2023-11-19 05:12:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2023-11-19 05:12:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 05:12:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 05:12:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2023-11-19 05:12:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2023-11-19 05:12:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-19 05:12:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-19 05:12:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2023-11-19 05:12:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2023-11-19 05:12:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 05:12:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 05:12:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 05:12:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 05:12:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-11-19 05:12:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-11-19 05:12:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 05:12:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 05:12:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:39,071 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:39,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:39,667 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:39,860 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:39,860 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:12:39,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:39 BoogieIcfgContainer [2023-11-19 05:12:39,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:39,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:39,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:39,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:39,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:37" (1/3) ... [2023-11-19 05:12:39,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dae262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:39, skipping insertion in model container [2023-11-19 05:12:39,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:38" (2/3) ... [2023-11-19 05:12:39,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dae262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:39, skipping insertion in model container [2023-11-19 05:12:39,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:39" (3/3) ... [2023-11-19 05:12:39,890 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2023-11-19 05:12:39,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:39,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:12:39,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:39,988 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@66700617, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:39,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:12:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 05:12:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:12:40,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:40,009 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-19 05:12:40,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:40,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1749623699, now seen corresponding path program 1 times [2023-11-19 05:12:40,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358009464] [2023-11-19 05:12:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:40,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:40,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358009464] [2023-11-19 05:12:40,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358009464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:40,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:40,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:40,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484613681] [2023-11-19 05:12:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:12:40,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:12:40,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:12:40,437 INFO L87 Difference]: Start difference. First operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:40,580 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2023-11-19 05:12:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:12:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-11-19 05:12:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:40,597 INFO L225 Difference]: With dead ends: 204 [2023-11-19 05:12:40,598 INFO L226 Difference]: Without dead ends: 105 [2023-11-19 05:12:40,604 INFO L412 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 [2023-11-19 05:12:40,608 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 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 [2023-11-19 05:12:40,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:12:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-19 05:12:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-19 05:12:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-19 05:12:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2023-11-19 05:12:40,678 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2023-11-19 05:12:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:40,680 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2023-11-19 05:12:40,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2023-11-19 05:12:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:12:40,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:40,687 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-19 05:12:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:40,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:40,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:40,689 INFO L85 PathProgramCache]: Analyzing trace with hash -595180854, now seen corresponding path program 1 times [2023-11-19 05:12:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:40,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719195217] [2023-11-19 05:12:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:40,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:40,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719195217] [2023-11-19 05:12:40,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719195217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:40,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:40,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715600689] [2023-11-19 05:12:40,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:40,974 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:41,041 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2023-11-19 05:12:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2023-11-19 05:12:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:41,046 INFO L225 Difference]: With dead ends: 167 [2023-11-19 05:12:41,046 INFO L226 Difference]: Without dead ends: 97 [2023-11-19 05:12:41,048 INFO L412 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 [2023-11-19 05:12:41,050 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:41,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:12:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-19 05:12:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-19 05:12:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 73 states have internal predecessors, (79), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 05:12:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2023-11-19 05:12:41,071 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2023-11-19 05:12:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:41,072 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2023-11-19 05:12:41,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2023-11-19 05:12:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:12:41,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:41,077 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-19 05:12:41,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:12:41,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:41,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash 782152187, now seen corresponding path program 1 times [2023-11-19 05:12:41,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:41,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416322785] [2023-11-19 05:12:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 05:12:41,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416322785] [2023-11-19 05:12:41,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416322785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:41,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:41,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958803540] [2023-11-19 05:12:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:41,464 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:12:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:41,862 INFO L93 Difference]: Finished difference Result 233 states and 333 transitions. [2023-11-19 05:12:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:12:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2023-11-19 05:12:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:41,878 INFO L225 Difference]: With dead ends: 233 [2023-11-19 05:12:41,878 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 05:12:41,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:12:41,882 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 81 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:41,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 487 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:12:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 05:12:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-11-19 05:12:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 112 states have internal predecessors, (126), 35 states have call successors, (35), 19 states have call predecessors, (35), 19 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2023-11-19 05:12:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2023-11-19 05:12:41,916 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2023-11-19 05:12:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:41,916 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2023-11-19 05:12:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:12:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2023-11-19 05:12:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:12:41,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:41,922 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:12:41,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:41,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:41,923 INFO L85 PathProgramCache]: Analyzing trace with hash 978653062, now seen corresponding path program 1 times [2023-11-19 05:12:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449245448] [2023-11-19 05:12:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:41,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 05:12:42,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449245448] [2023-11-19 05:12:42,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449245448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:42,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:42,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 05:12:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023786166] [2023-11-19 05:12:42,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:42,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:12:42,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:12:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:12:42,684 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:12:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:43,831 INFO L93 Difference]: Finished difference Result 438 states and 615 transitions. [2023-11-19 05:12:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 05:12:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 67 [2023-11-19 05:12:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:43,846 INFO L225 Difference]: With dead ends: 438 [2023-11-19 05:12:43,848 INFO L226 Difference]: Without dead ends: 304 [2023-11-19 05:12:43,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:12:43,860 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 432 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:43,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1304 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:12:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-19 05:12:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 292. [2023-11-19 05:12:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 192 states have (on average 1.2916666666666667) internal successors, (248), 220 states have internal predecessors, (248), 61 states have call successors, (61), 36 states have call predecessors, (61), 38 states have return successors, (80), 62 states have call predecessors, (80), 61 states have call successors, (80) [2023-11-19 05:12:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 389 transitions. [2023-11-19 05:12:43,960 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 389 transitions. Word has length 67 [2023-11-19 05:12:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 389 transitions. [2023-11-19 05:12:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:12:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 389 transitions. [2023-11-19 05:12:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:12:43,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:43,972 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:43,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:12:43,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:43,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1699594942, now seen corresponding path program 1 times [2023-11-19 05:12:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:43,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384319378] [2023-11-19 05:12:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:43,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:44,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:44,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384319378] [2023-11-19 05:12:44,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384319378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:44,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:12:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663773319] [2023-11-19 05:12:44,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:12:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:12:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:12:44,459 INFO L87 Difference]: Start difference. First operand 292 states and 389 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 05:12:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:45,187 INFO L93 Difference]: Finished difference Result 719 states and 968 transitions. [2023-11-19 05:12:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:12:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2023-11-19 05:12:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:45,195 INFO L225 Difference]: With dead ends: 719 [2023-11-19 05:12:45,195 INFO L226 Difference]: Without dead ends: 497 [2023-11-19 05:12:45,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:12:45,204 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 432 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:45,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 342 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-11-19 05:12:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 419. [2023-11-19 05:12:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 279 states have (on average 1.2867383512544803) internal successors, (359), 319 states have internal predecessors, (359), 84 states have call successors, (84), 49 states have call predecessors, (84), 55 states have return successors, (111), 90 states have call predecessors, (111), 84 states have call successors, (111) [2023-11-19 05:12:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 554 transitions. [2023-11-19 05:12:45,314 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 554 transitions. Word has length 70 [2023-11-19 05:12:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:45,318 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 554 transitions. [2023-11-19 05:12:45,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-19 05:12:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 554 transitions. [2023-11-19 05:12:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 05:12:45,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:45,326 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:12:45,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -650124766, now seen corresponding path program 1 times [2023-11-19 05:12:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447294702] [2023-11-19 05:12:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:45,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 05:12:45,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447294702] [2023-11-19 05:12:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447294702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:45,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:45,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:12:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223001696] [2023-11-19 05:12:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:12:45,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:12:45,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:12:45,584 INFO L87 Difference]: Start difference. First operand 419 states and 554 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:12:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:46,373 INFO L93 Difference]: Finished difference Result 866 states and 1162 transitions. [2023-11-19 05:12:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 05:12:46,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2023-11-19 05:12:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:46,382 INFO L225 Difference]: With dead ends: 866 [2023-11-19 05:12:46,382 INFO L226 Difference]: Without dead ends: 642 [2023-11-19 05:12:46,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:12:46,386 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 193 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:46,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 764 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-19 05:12:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 511. [2023-11-19 05:12:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 385 states have internal predecessors, (438), 99 states have call successors, (99), 65 states have call predecessors, (99), 71 states have return successors, (131), 103 states have call predecessors, (131), 99 states have call successors, (131) [2023-11-19 05:12:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 668 transitions. [2023-11-19 05:12:46,493 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 668 transitions. Word has length 88 [2023-11-19 05:12:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:46,494 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 668 transitions. [2023-11-19 05:12:46,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:12:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 668 transitions. [2023-11-19 05:12:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-19 05:12:46,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:46,503 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 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, 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] [2023-11-19 05:12:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:12:46,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:46,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -444171661, now seen corresponding path program 1 times [2023-11-19 05:12:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376705542] [2023-11-19 05:12:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:12:46,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:46,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376705542] [2023-11-19 05:12:46,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376705542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:46,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576453041] [2023-11-19 05:12:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:46,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:46,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:46,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:47,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:47,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-19 05:12:47,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:47,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576453041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:47,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:47,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-11-19 05:12:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680382535] [2023-11-19 05:12:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:47,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:12:47,149 INFO L87 Difference]: Start difference. First operand 511 states and 668 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:12:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:47,335 INFO L93 Difference]: Finished difference Result 1158 states and 1534 transitions. [2023-11-19 05:12:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2023-11-19 05:12:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:47,343 INFO L225 Difference]: With dead ends: 1158 [2023-11-19 05:12:47,343 INFO L226 Difference]: Without dead ends: 682 [2023-11-19 05:12:47,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:12:47,346 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:47,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 253 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:12:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-11-19 05:12:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 665. [2023-11-19 05:12:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 446 states have (on average 1.2914798206278026) internal successors, (576), 504 states have internal predecessors, (576), 125 states have call successors, (125), 86 states have call predecessors, (125), 93 states have return successors, (170), 126 states have call predecessors, (170), 125 states have call successors, (170) [2023-11-19 05:12:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 871 transitions. [2023-11-19 05:12:47,443 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 871 transitions. Word has length 131 [2023-11-19 05:12:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:47,444 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 871 transitions. [2023-11-19 05:12:47,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-19 05:12:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 871 transitions. [2023-11-19 05:12:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 05:12:47,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:47,450 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2023-11-19 05:12:47,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:12:47,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:47,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2028560983, now seen corresponding path program 2 times [2023-11-19 05:12:47,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:47,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867362584] [2023-11-19 05:12:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:47,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-19 05:12:48,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867362584] [2023-11-19 05:12:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867362584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:48,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242670168] [2023-11-19 05:12:48,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:12:48,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:48,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:48,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:48,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:48,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:12:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:12:48,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:12:48,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-19 05:12:48,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:12:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-19 05:12:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242670168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:12:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011025366] [2023-11-19 05:12:49,175 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-11-19 05:12:49,175 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:12:49,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:12:49,189 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:12:49,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:00,146 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 27 for LOIs [2023-11-19 05:13:00,156 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 10 for LOIs [2023-11-19 05:13:00,364 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 17 for LOIs [2023-11-19 05:13:00,391 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 1 for LOIs [2023-11-19 05:13:00,393 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 148 for LOIs [2023-11-19 05:13:00,541 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 19 for LOIs [2023-11-19 05:13:00,676 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 23 for LOIs [2023-11-19 05:13:00,680 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 20 for LOIs [2023-11-19 05:13:00,683 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:11,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9671#(and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2147483647) (<= 0 (+ ~waterLevel~0 2147483648)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~11#1| 2)) (<= 0 (+ ~pumpRunning~0 2147483648)) (= ~switchedOnBeforeTS~0 0) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|))' at error location [2023-11-19 05:13:11,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:11,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-19 05:13:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255417122] [2023-11-19 05:13:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 05:13:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 05:13:11,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=5463, Unknown=0, NotChecked=0, Total=6006 [2023-11-19 05:13:11,690 INFO L87 Difference]: Start difference. First operand 665 states and 871 transitions. Second operand has 20 states, 19 states have (on average 8.210526315789474) internal successors, (156), 20 states have internal predecessors, (156), 10 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2023-11-19 05:13:14,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:14,578 INFO L93 Difference]: Finished difference Result 1726 states and 2371 transitions. [2023-11-19 05:13:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-19 05:13:14,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 8.210526315789474) internal successors, (156), 20 states have internal predecessors, (156), 10 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 149 [2023-11-19 05:13:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:14,581 INFO L225 Difference]: With dead ends: 1726 [2023-11-19 05:13:14,581 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:13:14,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 411 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5658 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1195, Invalid=13085, Unknown=0, NotChecked=0, Total=14280 [2023-11-19 05:13:14,593 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 1535 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:14,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1535 Valid, 1175 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 05:13:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:13:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:13:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:13:14,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 149 [2023-11-19 05:13:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:14,595 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:13:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 8.210526315789474) internal successors, (156), 20 states have internal predecessors, (156), 10 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2023-11-19 05:13:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:13:14,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:13:14,598 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:13:14,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:14,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef7e86-f858-449f-a5ed-f22eb98196a3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:14,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.