./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5 --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 59d05b45c2855b02eb92cf6428285b3e4820a09d46d6a6d0a0748347de3adbb6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:05:27,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:05:27,960 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:05:27,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:05:27,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:05:28,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:05:28,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:05:28,011 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:05:28,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:05:28,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:05:28,018 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:05:28,018 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:05:28,019 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:05:28,021 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:05:28,021 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:05:28,022 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:05:28,022 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:05:28,023 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:05:28,023 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:05:28,023 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:05:28,024 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:05:28,025 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:05:28,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:05:28,026 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:05:28,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:05:28,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:05:28,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:05:28,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:05:28,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:05:28,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:05:28,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:05:28,030 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:05:28,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:05:28,031 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:05:28,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:05:28,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:05:28,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:05:28,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:05:28,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:05:28,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:05:28,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:05:28,033 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:05:28,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:05:28,033 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:05:28,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:05:28,034 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:05:28,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:05:28,035 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_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d05b45c2855b02eb92cf6428285b3e4820a09d46d6a6d0a0748347de3adbb6 [2023-11-21 19:05:28,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:05:28,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:05:28,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:05:28,414 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:05:28,415 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:05:28,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c [2023-11-21 19:05:31,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:05:31,889 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:05:31,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c [2023-11-21 19:05:31,912 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/data/48607b5dc/f55a22ff3dc34422a38e9ae118f95fc6/FLAG186a8605a [2023-11-21 19:05:31,930 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/data/48607b5dc/f55a22ff3dc34422a38e9ae118f95fc6 [2023-11-21 19:05:31,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:05:31,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:05:31,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:05:31,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:05:31,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:05:31,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:05:31" (1/1) ... [2023-11-21 19:05:31,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33465183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:31, skipping insertion in model container [2023-11-21 19:05:31,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:05:31" (1/1) ... [2023-11-21 19:05:32,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:05:32,333 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_ebabb991-204d-4a7c-8381-ff43c423c33a/sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c[6823,6836] [2023-11-21 19:05:32,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:05:32,415 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:05:32,426 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [49] [2023-11-21 19:05:32,428 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [87] [2023-11-21 19:05:32,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [363] [2023-11-21 19:05:32,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [435] [2023-11-21 19:05:32,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [444] [2023-11-21 19:05:32,429 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [483] [2023-11-21 19:05:32,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [587] [2023-11-21 19:05:32,430 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [684] [2023-11-21 19:05:32,449 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_ebabb991-204d-4a7c-8381-ff43c423c33a/sv-benchmarks/c/product-lines/minepump_spec2_product64.cil.c[6823,6836] [2023-11-21 19:05:32,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:05:32,518 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:05:32,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32 WrapperNode [2023-11-21 19:05:32,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:05:32,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:05:32,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:05:32,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:05:32,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,596 INFO L138 Inliner]: procedures = 60, calls = 108, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 231 [2023-11-21 19:05:32,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:05:32,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:05:32,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:05:32,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:05:32,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:05:32,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:05:32,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:05:32,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:05:32,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (1/1) ... [2023-11-21 19:05:32,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:05:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:05:32,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:05:32,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:05:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:05:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-21 19:05:32,722 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-21 19:05:32,723 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 19:05:32,723 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 19:05:32,723 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-21 19:05:32,723 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-21 19:05:32,724 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 19:05:32,724 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 19:05:32,724 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 19:05:32,724 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-21 19:05:32,724 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-21 19:05:32,725 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-21 19:05:32,725 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 19:05:32,725 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-21 19:05:32,725 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-21 19:05:32,725 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-21 19:05:32,726 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-21 19:05:32,726 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-21 19:05:32,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:05:32,726 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-21 19:05:32,727 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-21 19:05:32,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:05:32,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:05:32,813 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:05:32,815 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:05:33,190 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:05:33,375 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:05:33,376 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 19:05:33,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:05:33 BoogieIcfgContainer [2023-11-21 19:05:33,378 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:05:33,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:05:33,382 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:05:33,385 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:05:33,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:05:31" (1/3) ... [2023-11-21 19:05:33,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166c40d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:05:33, skipping insertion in model container [2023-11-21 19:05:33,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:05:32" (2/3) ... [2023-11-21 19:05:33,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166c40d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:05:33, skipping insertion in model container [2023-11-21 19:05:33,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:05:33" (3/3) ... [2023-11-21 19:05:33,389 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product64.cil.c [2023-11-21 19:05:33,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:05:33,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:05:33,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:05:33,472 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;@9114057, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:05:33,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:05:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 60 states have internal predecessors, (70), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-21 19:05:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 19:05:33,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:33,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:33,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:33,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1465604032, now seen corresponding path program 1 times [2023-11-21 19:05:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:33,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791263479] [2023-11-21 19:05:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:05:33,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:33,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791263479] [2023-11-21 19:05:33,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791263479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:33,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:05:33,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457803153] [2023-11-21 19:05:33,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 19:05:33,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 19:05:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 19:05:33,835 INFO L87 Difference]: Start difference. First operand has 80 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 60 states have internal predecessors, (70), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) 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) [2023-11-21 19:05:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:33,960 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2023-11-21 19:05:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 19:05:33,963 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 [2023-11-21 19:05:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:33,971 INFO L225 Difference]: With dead ends: 158 [2023-11-21 19:05:33,971 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 19:05:33,975 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 [2023-11-21 19:05:33,978 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:33,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:05:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 19:05:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-21 19:05:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 56 states have internal predecessors, (62), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-21 19:05:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2023-11-21 19:05:34,031 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 17 [2023-11-21 19:05:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2023-11-21 19:05:34,032 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) [2023-11-21 19:05:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2023-11-21 19:05:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:05:34,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:34,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:34,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:05:34,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:34,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1287626637, now seen corresponding path program 1 times [2023-11-21 19:05:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:34,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351175945] [2023-11-21 19:05:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:05:34,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351175945] [2023-11-21 19:05:34,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351175945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:34,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:34,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:05:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228354792] [2023-11-21 19:05:34,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:34,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:05:34,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:05:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:05:34,147 INFO L87 Difference]: Start difference. First operand 75 states and 99 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) [2023-11-21 19:05:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:34,228 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2023-11-21 19:05:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:05:34,229 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 [2023-11-21 19:05:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:34,231 INFO L225 Difference]: With dead ends: 122 [2023-11-21 19:05:34,231 INFO L226 Difference]: Without dead ends: 67 [2023-11-21 19:05:34,232 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 [2023-11-21 19:05:34,234 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:34,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:05:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-21 19:05:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-21 19:05:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 51 states have internal predecessors, (56), 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) [2023-11-21 19:05:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2023-11-21 19:05:34,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 18 [2023-11-21 19:05:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:34,248 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2023-11-21 19:05:34,249 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) [2023-11-21 19:05:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2023-11-21 19:05:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:05:34,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:34,251 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] [2023-11-21 19:05:34,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:05:34,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:34,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1023780792, now seen corresponding path program 1 times [2023-11-21 19:05:34,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:34,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021433197] [2023-11-21 19:05:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:34,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:05:34,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:34,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021433197] [2023-11-21 19:05:34,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021433197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:34,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:34,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:05:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225704965] [2023-11-21 19:05:34,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:34,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:05:34,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:05:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:05:34,387 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-21 19:05:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:34,508 INFO L93 Difference]: Finished difference Result 166 states and 218 transitions. [2023-11-21 19:05:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:05:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2023-11-21 19:05:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:34,511 INFO L225 Difference]: With dead ends: 166 [2023-11-21 19:05:34,512 INFO L226 Difference]: Without dead ends: 101 [2023-11-21 19:05:34,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:05:34,515 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 111 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:34,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 173 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:05:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-21 19:05:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2023-11-21 19:05:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 75 states have internal predecessors, (85), 21 states have call successors, (21), 14 states have call predecessors, (21), 14 states have return successors, (22), 15 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-21 19:05:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2023-11-21 19:05:34,538 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 21 [2023-11-21 19:05:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:34,538 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2023-11-21 19:05:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-21 19:05:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2023-11-21 19:05:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:05:34,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:34,541 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] [2023-11-21 19:05:34,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:05:34,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:34,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:34,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1309904953, now seen corresponding path program 1 times [2023-11-21 19:05:34,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014352508] [2023-11-21 19:05:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:05:34,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:34,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014352508] [2023-11-21 19:05:34,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014352508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:34,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:05:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630352109] [2023-11-21 19:05:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:34,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:05:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:05:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:05:34,693 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 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) [2023-11-21 19:05:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:34,799 INFO L93 Difference]: Finished difference Result 236 states and 316 transitions. [2023-11-21 19:05:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:05:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 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 24 [2023-11-21 19:05:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:34,802 INFO L225 Difference]: With dead ends: 236 [2023-11-21 19:05:34,803 INFO L226 Difference]: Without dead ends: 140 [2023-11-21 19:05:34,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:05:34,806 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:34,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 190 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:05:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-21 19:05:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2023-11-21 19:05:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 100 states have internal predecessors, (114), 25 states have call successors, (25), 21 states have call predecessors, (25), 21 states have return successors, (33), 23 states have call predecessors, (33), 25 states have call successors, (33) [2023-11-21 19:05:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2023-11-21 19:05:34,830 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 24 [2023-11-21 19:05:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:34,831 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2023-11-21 19:05:34,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 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) [2023-11-21 19:05:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2023-11-21 19:05:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 19:05:34,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:34,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:34,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:05:34,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:34,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash 86022725, now seen corresponding path program 1 times [2023-11-21 19:05:34,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824217306] [2023-11-21 19:05:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:05:35,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:35,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824217306] [2023-11-21 19:05:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824217306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:35,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:35,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:05:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016115324] [2023-11-21 19:05:35,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:05:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:05:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:05:35,014 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:05:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:35,126 INFO L93 Difference]: Finished difference Result 234 states and 303 transitions. [2023-11-21 19:05:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:05:35,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-21 19:05:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:35,136 INFO L225 Difference]: With dead ends: 234 [2023-11-21 19:05:35,136 INFO L226 Difference]: Without dead ends: 232 [2023-11-21 19:05:35,138 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 [2023-11-21 19:05:35,146 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 64 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:35,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 156 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:05:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-21 19:05:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2023-11-21 19:05:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 160 states have internal predecessors, (181), 44 states have call successors, (44), 36 states have call predecessors, (44), 35 states have return successors, (64), 38 states have call predecessors, (64), 44 states have call successors, (64) [2023-11-21 19:05:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2023-11-21 19:05:35,229 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 42 [2023-11-21 19:05:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:35,230 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2023-11-21 19:05:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:05:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2023-11-21 19:05:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 19:05:35,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:35,249 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:05:35,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -455381352, now seen corresponding path program 1 times [2023-11-21 19:05:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:35,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100260312] [2023-11-21 19:05:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:35,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 19:05:35,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100260312] [2023-11-21 19:05:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100260312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:05:35,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:05:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:05:35,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432104149] [2023-11-21 19:05:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:05:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:05:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:05:35,426 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:05:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:35,650 INFO L93 Difference]: Finished difference Result 443 states and 577 transitions. [2023-11-21 19:05:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:05:35,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-11-21 19:05:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:35,655 INFO L225 Difference]: With dead ends: 443 [2023-11-21 19:05:35,655 INFO L226 Difference]: Without dead ends: 223 [2023-11-21 19:05:35,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:05:35,662 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 104 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:35,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 146 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:05:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-21 19:05:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 217. [2023-11-21 19:05:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 156 states have internal predecessors, (175), 43 states have call successors, (43), 35 states have call predecessors, (43), 35 states have return successors, (57), 37 states have call predecessors, (57), 43 states have call successors, (57) [2023-11-21 19:05:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2023-11-21 19:05:35,716 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 89 [2023-11-21 19:05:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:35,718 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2023-11-21 19:05:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-21 19:05:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2023-11-21 19:05:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-21 19:05:35,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:35,722 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:35,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:05:35,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:35,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1128703952, now seen corresponding path program 1 times [2023-11-21 19:05:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:35,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686475429] [2023-11-21 19:05:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-21 19:05:36,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:36,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686475429] [2023-11-21 19:05:36,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686475429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:05:36,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435586628] [2023-11-21 19:05:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:36,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:05:36,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:05:36,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:05:36,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:05:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:36,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 19:05:36,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:05:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 19:05:36,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:05:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 19:05:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435586628] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 19:05:37,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:05:37,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 8] total 24 [2023-11-21 19:05:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921293508] [2023-11-21 19:05:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:05:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:05:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:05:37,548 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-21 19:05:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:38,332 INFO L93 Difference]: Finished difference Result 641 states and 840 transitions. [2023-11-21 19:05:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 19:05:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 83 [2023-11-21 19:05:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:38,336 INFO L225 Difference]: With dead ends: 641 [2023-11-21 19:05:38,336 INFO L226 Difference]: Without dead ends: 426 [2023-11-21 19:05:38,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2023-11-21 19:05:38,339 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 433 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:38,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 235 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:05:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-11-21 19:05:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 355. [2023-11-21 19:05:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 236 states have (on average 1.2627118644067796) internal successors, (298), 256 states have internal predecessors, (298), 59 states have call successors, (59), 55 states have call predecessors, (59), 59 states have return successors, (87), 57 states have call predecessors, (87), 59 states have call successors, (87) [2023-11-21 19:05:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 444 transitions. [2023-11-21 19:05:38,403 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 444 transitions. Word has length 83 [2023-11-21 19:05:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:38,403 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 444 transitions. [2023-11-21 19:05:38,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-21 19:05:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 444 transitions. [2023-11-21 19:05:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-21 19:05:38,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:38,406 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:38,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:05:38,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 19:05:38,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:38,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -101159425, now seen corresponding path program 1 times [2023-11-21 19:05:38,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:38,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271611576] [2023-11-21 19:05:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-21 19:05:38,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:38,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271611576] [2023-11-21 19:05:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271611576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:05:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671264717] [2023-11-21 19:05:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:38,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:05:38,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:05:38,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:05:38,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:05:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:39,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 19:05:39,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:05:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-21 19:05:39,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:05:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-21 19:05:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671264717] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 19:05:39,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:05:39,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 5] total 14 [2023-11-21 19:05:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375284546] [2023-11-21 19:05:39,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:05:39,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:05:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:05:39,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:05:39,437 INFO L87 Difference]: Start difference. First operand 355 states and 444 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 19:05:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:05:39,676 INFO L93 Difference]: Finished difference Result 937 states and 1181 transitions. [2023-11-21 19:05:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:05:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2023-11-21 19:05:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:05:39,682 INFO L225 Difference]: With dead ends: 937 [2023-11-21 19:05:39,682 INFO L226 Difference]: Without dead ends: 584 [2023-11-21 19:05:39,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-21 19:05:39,686 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 60 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:05:39,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 314 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:05:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-11-21 19:05:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 560. [2023-11-21 19:05:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 379 states have (on average 1.2506596306068603) internal successors, (474), 405 states have internal predecessors, (474), 90 states have call successors, (90), 84 states have call predecessors, (90), 90 states have return successors, (129), 88 states have call predecessors, (129), 90 states have call successors, (129) [2023-11-21 19:05:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 693 transitions. [2023-11-21 19:05:39,767 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 693 transitions. Word has length 86 [2023-11-21 19:05:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:05:39,768 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 693 transitions. [2023-11-21 19:05:39,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 19:05:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 693 transitions. [2023-11-21 19:05:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 19:05:39,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:05:39,772 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:05:39,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:05:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 19:05:39,985 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:05:39,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:05:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2079126490, now seen corresponding path program 1 times [2023-11-21 19:05:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:05:39,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435739101] [2023-11-21 19:05:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:05:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:05:40,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:05:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435739101] [2023-11-21 19:05:40,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435739101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:05:40,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579524308] [2023-11-21 19:05:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:05:40,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:05:40,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:05:40,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:05:40,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:05:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:05:40,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-21 19:05:40,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:05:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 19:05:41,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:05:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-21 19:05:42,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579524308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:05:42,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103360880] [2023-11-21 19:05:42,704 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-11-21 19:05:42,705 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:05:42,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:05:42,714 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:05:42,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:05:51,494 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 3 for LOIs [2023-11-21 19:05:51,501 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 16 for LOIs [2023-11-21 19:05:51,687 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 11 for LOIs [2023-11-21 19:05:51,720 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 11 for LOIs [2023-11-21 19:05:51,802 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 12 for LOIs [2023-11-21 19:05:51,817 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 35 for LOIs [2023-11-21 19:05:51,832 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 12 for LOIs [2023-11-21 19:05:51,842 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:05:57,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8099#(and (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret8#1_112| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret8#1_112| 0) (= ~pumpRunning~0 1))) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (<= 2 ~waterLevel~0) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| 0)) (<= 0 |old(~methAndRunningLastTime~0)|) (= |old(~waterLevel~0)| ~waterLevel~0) (= |old(~methAndRunningLastTime~0)| ~methAndRunningLastTime~0) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ ~methaneLevelCritical~0 2147483648)) (not (= ~methAndRunningLastTime~0 0)))' at error location [2023-11-21 19:05:57,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:05:57,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:05:57,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 37 [2023-11-21 19:05:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108081344] [2023-11-21 19:05:57,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:05:57,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-21 19:05:57,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:05:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-21 19:05:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=4803, Unknown=0, NotChecked=0, Total=5256 [2023-11-21 19:05:57,151 INFO L87 Difference]: Start difference. First operand 560 states and 693 transitions. Second operand has 37 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 11 states have call successors, (31), 7 states have call predecessors, (31), 17 states have return successors, (35), 20 states have call predecessors, (35), 11 states have call successors, (35) [2023-11-21 19:06:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:06:00,961 INFO L93 Difference]: Finished difference Result 1398 states and 1884 transitions. [2023-11-21 19:06:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-21 19:06:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 11 states have call successors, (31), 7 states have call predecessors, (31), 17 states have return successors, (35), 20 states have call predecessors, (35), 11 states have call successors, (35) Word has length 89 [2023-11-21 19:06:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:06:00,970 INFO L225 Difference]: With dead ends: 1398 [2023-11-21 19:06:00,970 INFO L226 Difference]: Without dead ends: 840 [2023-11-21 19:06:00,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1337, Invalid=11773, Unknown=0, NotChecked=0, Total=13110 [2023-11-21 19:06:00,981 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 921 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:06:00,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 870 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 19:06:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-21 19:06:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 596. [2023-11-21 19:06:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 405 states have (on average 1.2296296296296296) internal successors, (498), 430 states have internal predecessors, (498), 95 states have call successors, (95), 86 states have call predecessors, (95), 95 states have return successors, (129), 96 states have call predecessors, (129), 95 states have call successors, (129) [2023-11-21 19:06:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 722 transitions. [2023-11-21 19:06:01,066 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 722 transitions. Word has length 89 [2023-11-21 19:06:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:06:01,067 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 722 transitions. [2023-11-21 19:06:01,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 11 states have call successors, (31), 7 states have call predecessors, (31), 17 states have return successors, (35), 20 states have call predecessors, (35), 11 states have call successors, (35) [2023-11-21 19:06:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 722 transitions. [2023-11-21 19:06:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-21 19:06:01,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:06:01,073 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-21 19:06:01,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:06:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:06:01,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:06:01,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:06:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1302934372, now seen corresponding path program 1 times [2023-11-21 19:06:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:06:01,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312559851] [2023-11-21 19:06:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:06:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:06:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:06:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-21 19:06:01,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:06:01,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312559851] [2023-11-21 19:06:01,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312559851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:06:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97231967] [2023-11-21 19:06:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:06:01,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:06:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:06:01,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:06:01,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebabb991-204d-4a7c-8381-ff43c423c33a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:06:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:06:01,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 19:06:01,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:06:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-21 19:06:02,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:06:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 50 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-21 19:06:03,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97231967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:06:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638964127] [2023-11-21 19:06:03,049 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2023-11-21 19:06:03,049 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:06:03,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:06:03,051 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:06:03,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:06:12,939 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 29 for LOIs [2023-11-21 19:06:12,945 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 37 for LOIs [2023-11-21 19:06:13,165 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 44 for LOIs [2023-11-21 19:06:13,326 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 56 for LOIs [2023-11-21 19:06:13,603 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2023-11-21 19:06:13,983 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 1 for LOIs [2023-11-21 19:06:13,984 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 7 for LOIs [2023-11-21 19:06:13,986 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 13 for LOIs [2023-11-21 19:06:13,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:06:18,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11731#(and (= |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1|) (<= 0 (+ |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| 2147483648)) (<= |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| 2147483647) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~7#1| 0)) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~3#1| 0)) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (not (= ~methAndRunningLastTime~0 0)))' at error location [2023-11-21 19:06:18,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:06:18,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:06:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 31 [2023-11-21 19:06:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768871241] [2023-11-21 19:06:18,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:06:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 19:06:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:06:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 19:06:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=4990, Unknown=0, NotChecked=0, Total=5402 [2023-11-21 19:06:18,932 INFO L87 Difference]: Start difference. First operand 596 states and 722 transitions. Second operand has 31 states, 27 states have (on average 5.555555555555555) internal successors, (150), 25 states have internal predecessors, (150), 14 states have call successors, (44), 9 states have call predecessors, (44), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45)