./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire --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 cbcb1e9315abec7fabb6a689d6a1c811fb94154c71589df191460c14d014c3cb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:04,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:04,813 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:04,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:04,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:04,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:04,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:04,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:04,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:04,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:04,850 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:04,851 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:04,852 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:04,852 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:04,853 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:04,854 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:04,855 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:04,855 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:04,856 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:04,859 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:04,860 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:04,865 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:04,866 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:04,866 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:04,867 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:04,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:04,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:04,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:04,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:04,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:04,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:04,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:04,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:04,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:04,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:04,877 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:04,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:04,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:04,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:04,880 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:04,880 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:04,880 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:04,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:04,881 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:04,882 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:04,882 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:04,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:04,883 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_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbcb1e9315abec7fabb6a689d6a1c811fb94154c71589df191460c14d014c3cb [2023-11-23 20:34:05,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:05,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:05,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:05,231 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:05,231 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:05,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c [2023-11-23 20:34:08,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:08,711 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:08,711 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c [2023-11-23 20:34:08,728 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/data/f70270414/501be0f901dd4e25a7de52d55b28ef4e/FLAG3ef650d97 [2023-11-23 20:34:08,748 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/data/f70270414/501be0f901dd4e25a7de52d55b28ef4e [2023-11-23 20:34:08,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:08,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:08,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:08,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:08,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:08,768 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:08" (1/1) ... [2023-11-23 20:34:08,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a03c49f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:08, skipping insertion in model container [2023-11-23 20:34:08,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:08" (1/1) ... [2023-11-23 20:34:08,827 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:09,049 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_04b1ef02-148d-440e-b911-5207100459d1/sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c[4478,4491] [2023-11-23 20:34:09,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:09,207 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:09,217 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [49] [2023-11-23 20:34:09,218 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [160] [2023-11-23 20:34:09,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [262] [2023-11-23 20:34:09,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [271] [2023-11-23 20:34:09,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [306] [2023-11-23 20:34:09,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [341] [2023-11-23 20:34:09,220 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [707] [2023-11-23 20:34:09,220 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [775] [2023-11-23 20:34:09,235 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_04b1ef02-148d-440e-b911-5207100459d1/sv-benchmarks/c/product-lines/minepump_spec3_product54.cil.c[4478,4491] [2023-11-23 20:34:09,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:09,308 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:09,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09 WrapperNode [2023-11-23 20:34:09,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:09,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:09,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:09,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:09,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,390 INFO L138 Inliner]: procedures = 57, calls = 104, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 231 [2023-11-23 20:34:09,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:09,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:09,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:09,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:09,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,410 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:09,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:09,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:09,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:09,431 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (1/1) ... [2023-11-23 20:34:09,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:09,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:09,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 20:34:09,551 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 20:34:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:34:09,552 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:34:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:34:09,553 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:34:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-23 20:34:09,554 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-23 20:34:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:34:09,555 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:34:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 20:34:09,556 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 20:34:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 20:34:09,557 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 20:34:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 20:34:09,558 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 20:34:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 20:34:09,561 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 20:34:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:09,698 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:09,701 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:10,058 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:10,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:10,243 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:34:10,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:10 BoogieIcfgContainer [2023-11-23 20:34:10,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:10,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:10,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:10,252 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:10,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:08" (1/3) ... [2023-11-23 20:34:10,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a89a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:10, skipping insertion in model container [2023-11-23 20:34:10,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:09" (2/3) ... [2023-11-23 20:34:10,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a89a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:10, skipping insertion in model container [2023-11-23 20:34:10,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:10" (3/3) ... [2023-11-23 20:34:10,255 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product54.cil.c [2023-11-23 20:34:10,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:10,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:34:10,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:10,351 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;@261acbfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:10,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:34:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 20:34:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:34:10,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:10,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:10,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:10,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1150430532, now seen corresponding path program 1 times [2023-11-23 20:34:10,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:10,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890364582] [2023-11-23 20:34:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:10,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890364582] [2023-11-23 20:34:10,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890364582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:10,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:10,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:34:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568339653] [2023-11-23 20:34:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:10,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:34:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:34:10,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:34:10,677 INFO L87 Difference]: Start difference. First operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:10,750 INFO L93 Difference]: Finished difference Result 136 states and 185 transitions. [2023-11-23 20:34:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:34:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-23 20:34:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:10,762 INFO L225 Difference]: With dead ends: 136 [2023-11-23 20:34:10,763 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 20:34:10,767 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 [2023-11-23 20:34:10,771 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:10,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:34:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 20:34:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-23 20:34:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 20:34:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2023-11-23 20:34:10,821 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 17 [2023-11-23 20:34:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:10,821 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2023-11-23 20:34:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2023-11-23 20:34:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:34:10,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:10,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:10,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash 230164562, now seen corresponding path program 1 times [2023-11-23 20:34:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737186525] [2023-11-23 20:34:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:10,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:10,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737186525] [2023-11-23 20:34:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737186525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:10,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713367951] [2023-11-23 20:34:10,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:10,965 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:11,046 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2023-11-23 20:34:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-23 20:34:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:11,053 INFO L225 Difference]: With dead ends: 105 [2023-11-23 20:34:11,053 INFO L226 Difference]: Without dead ends: 56 [2023-11-23 20:34:11,057 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 [2023-11-23 20:34:11,058 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:11,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-23 20:34:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-23 20:34:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 43 states have internal predecessors, (46), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 20:34:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-23 20:34:11,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 18 [2023-11-23 20:34:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:11,074 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-23 20:34:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-23 20:34:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:34:11,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:11,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:11,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:34:11,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:11,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2025659563, now seen corresponding path program 1 times [2023-11-23 20:34:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040829546] [2023-11-23 20:34:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:11,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040829546] [2023-11-23 20:34:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040829546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:11,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:11,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:34:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50483] [2023-11-23 20:34:11,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:34:11,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:34:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:11,457 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:11,673 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2023-11-23 20:34:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:34:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-23 20:34:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:11,676 INFO L225 Difference]: With dead ends: 178 [2023-11-23 20:34:11,676 INFO L226 Difference]: Without dead ends: 124 [2023-11-23 20:34:11,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:34:11,679 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 62 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:11,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 229 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-23 20:34:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2023-11-23 20:34:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 79 states have internal predecessors, (86), 20 states have call successors, (20), 15 states have call predecessors, (20), 18 states have return successors, (23), 17 states have call predecessors, (23), 20 states have call successors, (23) [2023-11-23 20:34:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-11-23 20:34:11,725 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 20 [2023-11-23 20:34:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:11,725 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-11-23 20:34:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:34:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-11-23 20:34:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:34:11,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:11,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:34:11,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:11,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 150185524, now seen corresponding path program 1 times [2023-11-23 20:34:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:11,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550373605] [2023-11-23 20:34:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:11,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:11,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550373605] [2023-11-23 20:34:11,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550373605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:11,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:11,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854770112] [2023-11-23 20:34:11,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:11,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:11,913 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:34:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:11,954 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions. [2023-11-23 20:34:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-23 20:34:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:11,961 INFO L225 Difference]: With dead ends: 212 [2023-11-23 20:34:11,962 INFO L226 Difference]: Without dead ends: 107 [2023-11-23 20:34:11,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:11,972 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:11,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:34:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-23 20:34:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-23 20:34:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 79 states have internal predecessors, (84), 20 states have call successors, (20), 15 states have call predecessors, (20), 18 states have return successors, (23), 17 states have call predecessors, (23), 20 states have call successors, (23) [2023-11-23 20:34:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2023-11-23 20:34:12,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 23 [2023-11-23 20:34:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:12,008 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2023-11-23 20:34:12,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:34:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2023-11-23 20:34:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:34:12,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:12,011 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:34:12,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:34:12,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:12,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1354966948, now seen corresponding path program 1 times [2023-11-23 20:34:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145799180] [2023-11-23 20:34:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:12,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:12,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145799180] [2023-11-23 20:34:12,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145799180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:12,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:12,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720111090] [2023-11-23 20:34:12,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:12,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:12,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:12,118 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:34:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:12,179 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2023-11-23 20:34:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-11-23 20:34:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:12,182 INFO L225 Difference]: With dead ends: 200 [2023-11-23 20:34:12,182 INFO L226 Difference]: Without dead ends: 146 [2023-11-23 20:34:12,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:12,184 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 42 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:12,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:34:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-23 20:34:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2023-11-23 20:34:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 104 states have internal predecessors, (115), 24 states have call successors, (24), 22 states have call predecessors, (24), 25 states have return successors, (33), 24 states have call predecessors, (33), 24 states have call successors, (33) [2023-11-23 20:34:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2023-11-23 20:34:12,207 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 33 [2023-11-23 20:34:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:12,207 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2023-11-23 20:34:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:34:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2023-11-23 20:34:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 20:34:12,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:12,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:34:12,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:12,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2061787315, now seen corresponding path program 1 times [2023-11-23 20:34:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:12,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987664396] [2023-11-23 20:34:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:12,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:12,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987664396] [2023-11-23 20:34:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987664396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:12,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:12,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:12,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798988543] [2023-11-23 20:34:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:12,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:12,287 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:34:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:12,373 INFO L93 Difference]: Finished difference Result 236 states and 292 transitions. [2023-11-23 20:34:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-23 20:34:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:12,375 INFO L225 Difference]: With dead ends: 236 [2023-11-23 20:34:12,376 INFO L226 Difference]: Without dead ends: 145 [2023-11-23 20:34:12,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:12,377 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 47 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:12,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 177 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-23 20:34:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-11-23 20:34:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 104 states have internal predecessors, (111), 24 states have call successors, (24), 22 states have call predecessors, (24), 25 states have return successors, (32), 24 states have call predecessors, (32), 24 states have call successors, (32) [2023-11-23 20:34:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2023-11-23 20:34:12,398 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 36 [2023-11-23 20:34:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:12,399 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2023-11-23 20:34:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:34:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2023-11-23 20:34:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:34:12,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:12,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:12,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:34:12,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:12,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 700931417, now seen corresponding path program 1 times [2023-11-23 20:34:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352784643] [2023-11-23 20:34:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:12,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352784643] [2023-11-23 20:34:12,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352784643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:12,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:12,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:34:12,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480491478] [2023-11-23 20:34:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:34:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:34:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:34:12,769 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 20:34:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:13,349 INFO L93 Difference]: Finished difference Result 411 states and 502 transitions. [2023-11-23 20:34:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:34:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2023-11-23 20:34:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:13,355 INFO L225 Difference]: With dead ends: 411 [2023-11-23 20:34:13,356 INFO L226 Difference]: Without dead ends: 320 [2023-11-23 20:34:13,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-23 20:34:13,359 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 266 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:13,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 235 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:34:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-23 20:34:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2023-11-23 20:34:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 198 states have (on average 1.202020202020202) internal successors, (238), 217 states have internal predecessors, (238), 52 states have call successors, (52), 43 states have call predecessors, (52), 47 states have return successors, (67), 49 states have call predecessors, (67), 52 states have call successors, (67) [2023-11-23 20:34:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 357 transitions. [2023-11-23 20:34:13,437 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 357 transitions. Word has length 39 [2023-11-23 20:34:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:13,437 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 357 transitions. [2023-11-23 20:34:13,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 20:34:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 357 transitions. [2023-11-23 20:34:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 20:34:13,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:13,444 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 20:34:13,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:34:13,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:13,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 227977609, now seen corresponding path program 1 times [2023-11-23 20:34:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510442203] [2023-11-23 20:34:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:13,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510442203] [2023-11-23 20:34:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510442203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469798029] [2023-11-23 20:34:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:13,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:13,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:13,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:34:13,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:34:14,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 20:34:14,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469798029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706147860] [2023-11-23 20:34:14,691 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-23 20:34:14,691 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:14,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:14,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:14,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:16,312 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 129 for LOIs [2023-11-23 20:34:16,796 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 129 for LOIs [2023-11-23 20:34:17,211 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 129 for LOIs [2023-11-23 20:34:17,377 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1706147860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:21,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 8, 8] total 29 [2023-11-23 20:34:21,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158175413] [2023-11-23 20:34:21,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 20:34:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:21,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 20:34:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2023-11-23 20:34:21,142 INFO L87 Difference]: Start difference. First operand 298 states and 357 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 20:34:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:22,177 INFO L93 Difference]: Finished difference Result 523 states and 626 transitions. [2023-11-23 20:34:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:34:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 60 [2023-11-23 20:34:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:22,187 INFO L225 Difference]: With dead ends: 523 [2023-11-23 20:34:22,187 INFO L226 Difference]: Without dead ends: 338 [2023-11-23 20:34:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2023-11-23 20:34:22,190 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 33 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:22,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 201 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:34:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-23 20:34:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2023-11-23 20:34:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 222 states have (on average 1.1936936936936937) internal successors, (265), 241 states have internal predecessors, (265), 57 states have call successors, (57), 48 states have call predecessors, (57), 52 states have return successors, (72), 54 states have call predecessors, (72), 57 states have call successors, (72) [2023-11-23 20:34:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 394 transitions. [2023-11-23 20:34:22,240 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 394 transitions. Word has length 60 [2023-11-23 20:34:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:22,240 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 394 transitions. [2023-11-23 20:34:22,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 20:34:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 394 transitions. [2023-11-23 20:34:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:34:22,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:22,243 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 20:34:22,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:22,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:22,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash -10296984, now seen corresponding path program 1 times [2023-11-23 20:34:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:22,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268656476] [2023-11-23 20:34:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:22,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:22,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268656476] [2023-11-23 20:34:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268656476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:22,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408647679] [2023-11-23 20:34:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:22,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:22,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:22,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:22,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:34:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:22,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 20:34:22,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:23,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 20:34:23,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408647679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:23,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069320323] [2023-11-23 20:34:23,618 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2023-11-23 20:34:23,618 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:23,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:23,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:23,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:26,744 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-23 20:34:26,769 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 155 for LOIs [2023-11-23 20:34:28,955 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 155 for LOIs [2023-11-23 20:34:30,052 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 155 for LOIs [2023-11-23 20:34:30,355 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 140 for LOIs [2023-11-23 20:34:30,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1069320323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:41,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [12, 9, 8] total 42 [2023-11-23 20:34:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751291813] [2023-11-23 20:34:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 20:34:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 20:34:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 20:34:41,792 INFO L87 Difference]: Start difference. First operand 332 states and 394 transitions. Second operand has 24 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-23 20:34:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:48,315 INFO L93 Difference]: Finished difference Result 599 states and 724 transitions. [2023-11-23 20:34:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 20:34:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 63 [2023-11-23 20:34:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:48,318 INFO L225 Difference]: With dead ends: 599 [2023-11-23 20:34:48,318 INFO L226 Difference]: Without dead ends: 387 [2023-11-23 20:34:48,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2023-11-23 20:34:48,324 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:48,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 512 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 20:34:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-23 20:34:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 364. [2023-11-23 20:34:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 244 states have (on average 1.1844262295081966) internal successors, (289), 264 states have internal predecessors, (289), 62 states have call successors, (62), 53 states have call predecessors, (62), 57 states have return successors, (77), 58 states have call predecessors, (77), 62 states have call successors, (77) [2023-11-23 20:34:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 428 transitions. [2023-11-23 20:34:48,400 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 428 transitions. Word has length 63 [2023-11-23 20:34:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:48,401 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 428 transitions. [2023-11-23 20:34:48,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-23 20:34:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 428 transitions. [2023-11-23 20:34:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:34:48,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:48,420 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 20:34:48,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:48,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 20:34:48,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash -529632718, now seen corresponding path program 1 times [2023-11-23 20:34:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998385802] [2023-11-23 20:34:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:48,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:48,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998385802] [2023-11-23 20:34:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998385802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:48,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:34:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708356230] [2023-11-23 20:34:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:34:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:34:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:34:48,945 INFO L87 Difference]: Start difference. First operand 364 states and 428 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-23 20:34:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:49,262 INFO L93 Difference]: Finished difference Result 597 states and 708 transitions. [2023-11-23 20:34:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:34:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 63 [2023-11-23 20:34:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:49,270 INFO L225 Difference]: With dead ends: 597 [2023-11-23 20:34:49,271 INFO L226 Difference]: Without dead ends: 412 [2023-11-23 20:34:49,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:34:49,273 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:49,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 123 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:34:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-23 20:34:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 341. [2023-11-23 20:34:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 228 states have (on average 1.1710526315789473) internal successors, (267), 244 states have internal predecessors, (267), 55 states have call successors, (55), 51 states have call predecessors, (55), 57 states have return successors, (65), 54 states have call predecessors, (65), 55 states have call successors, (65) [2023-11-23 20:34:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 387 transitions. [2023-11-23 20:34:49,358 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 387 transitions. Word has length 63 [2023-11-23 20:34:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:49,362 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 387 transitions. [2023-11-23 20:34:49,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-23 20:34:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 387 transitions. [2023-11-23 20:34:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 20:34:49,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:49,364 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 20:34:49,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:34:49,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:49,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1364469932, now seen corresponding path program 1 times [2023-11-23 20:34:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794404726] [2023-11-23 20:34:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:49,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:49,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794404726] [2023-11-23 20:34:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794404726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:49,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:49,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-23 20:34:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766081030] [2023-11-23 20:34:49,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:34:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:34:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:34:49,708 INFO L87 Difference]: Start difference. First operand 341 states and 387 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-23 20:34:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:50,313 INFO L93 Difference]: Finished difference Result 576 states and 667 transitions. [2023-11-23 20:34:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:34:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 64 [2023-11-23 20:34:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:50,318 INFO L225 Difference]: With dead ends: 576 [2023-11-23 20:34:50,319 INFO L226 Difference]: Without dead ends: 371 [2023-11-23 20:34:50,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-23 20:34:50,320 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 204 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 169 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:34:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-23 20:34:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 341. [2023-11-23 20:34:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 228 states have (on average 1.162280701754386) internal successors, (265), 244 states have internal predecessors, (265), 55 states have call successors, (55), 51 states have call predecessors, (55), 57 states have return successors, (65), 54 states have call predecessors, (65), 55 states have call successors, (65) [2023-11-23 20:34:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 385 transitions. [2023-11-23 20:34:50,388 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 385 transitions. Word has length 64 [2023-11-23 20:34:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 385 transitions. [2023-11-23 20:34:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-23 20:34:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 385 transitions. [2023-11-23 20:34:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 20:34:50,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:50,390 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:34:50,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 20:34:50,391 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:50,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash 612907507, now seen corresponding path program 1 times [2023-11-23 20:34:50,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:50,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270459614] [2023-11-23 20:34:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:34:50,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:50,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270459614] [2023-11-23 20:34:50,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270459614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:50,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974381806] [2023-11-23 20:34:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:50,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:50,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:50,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04b1ef02-148d-440e-b911-5207100459d1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:34:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:50,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 20:34:50,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:34:50,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 20:34:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974381806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676441221] [2023-11-23 20:34:51,316 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 20:34:51,316 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:51,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:51,317 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:51,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:53,485 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 137 for LOIs [2023-11-23 20:34:53,567 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-11-23 20:34:54,073 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 30 for LOIs [2023-11-23 20:34:54,129 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-23 20:34:54,175 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 36 for LOIs [2023-11-23 20:34:54,187 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 18 for LOIs [2023-11-23 20:34:54,191 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 53 for LOIs [2023-11-23 20:34:54,221 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:58,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9567#(and (= |timeShift___utac_acc__Specification3_spec__1_~tmp~1#1| 0) (= ~pumpRunning~0 0) (<= 0 |old(~pumpRunning~0)|) (= 2 ~waterLevel~0) (= ~methaneLevelCritical~0 0) (= |timeShift_isPumpRunning_#res#1| 0) (= 2 |timeShift_getWaterLevel_#res#1|) (= 0 |timeShift___utac_acc__Specification3_spec__1_~tmp___1~0#1|) (= 2 |timeShift___utac_acc__Specification3_spec__1_~tmp___0~0#1|))' at error location [2023-11-23 20:34:58,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:58,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2023-11-23 20:34:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298541946] [2023-11-23 20:34:58,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 20:34:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 20:34:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3231, Unknown=0, NotChecked=0, Total=3540 [2023-11-23 20:34:58,279 INFO L87 Difference]: Start difference. First operand 341 states and 385 transitions. Second operand has 24 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 11 states have call successors, (28), 7 states have call predecessors, (28), 10 states have return successors, (26), 13 states have call predecessors, (26), 10 states have call successors, (26)