./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 96a9f4a5eb48d3a052332271e6f513d6efe176b9f027fc1b42847acbd4831cf9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:03:31,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:03:31,573 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:03:31,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:03:31,580 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:03:31,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:03:31,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:03:31,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:03:31,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:03:31,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:03:31,623 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:03:31,624 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:03:31,625 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:03:31,625 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:03:31,626 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:03:31,626 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:03:31,627 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:03:31,627 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:03:31,628 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:03:31,629 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:03:31,629 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:03:31,630 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:03:31,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:03:31,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:03:31,632 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:03:31,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:03:31,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:03:31,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:03:31,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:03:31,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:03:31,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:03:31,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:03:31,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:03:31,636 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:03:31,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:03:31,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:03:31,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:31,647 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:03:31,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:03:31,648 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:03:31,648 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:03:31,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:03:31,649 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:03:31,649 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:03:31,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:03:31,650 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_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 96a9f4a5eb48d3a052332271e6f513d6efe176b9f027fc1b42847acbd4831cf9 [2023-11-19 05:03:31,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:03:31,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:03:31,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:03:31,984 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:03:31,984 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:03:31,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c [2023-11-19 05:03:35,168 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:03:35,529 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:03:35,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c [2023-11-19 05:03:35,548 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/data/45fa28636/b0458c7312684d6c8f186df8eb96c049/FLAG3a823a1ca [2023-11-19 05:03:35,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/data/45fa28636/b0458c7312684d6c8f186df8eb96c049 [2023-11-19 05:03:35,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:03:35,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:03:35,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:35,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:03:35,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:03:35,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:35" (1/1) ... [2023-11-19 05:03:35,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4226a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:35, skipping insertion in model container [2023-11-19 05:03:35,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:03:35" (1/1) ... [2023-11-19 05:03:35,643 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:03:35,879 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_e963ff4c-185c-481d-8d76-03e9c7529e44/sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c[11292,11305] [2023-11-19 05:03:35,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:35,940 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:03:35,954 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-19 05:03:35,956 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [415] [2023-11-19 05:03:35,956 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [424] [2023-11-19 05:03:35,956 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [499] [2023-11-19 05:03:35,957 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [730] [2023-11-19 05:03:35,958 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [825] [2023-11-19 05:03:35,958 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [926] [2023-11-19 05:03:35,958 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [975] [2023-11-19 05:03:36,040 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_e963ff4c-185c-481d-8d76-03e9c7529e44/sv-benchmarks/c/product-lines/minepump_spec5_product48.cil.c[11292,11305] [2023-11-19 05:03:36,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:03:36,111 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:03:36,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36 WrapperNode [2023-11-19 05:03:36,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:03:36,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:36,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:03:36,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:03:36,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,147 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,191 INFO L138 Inliner]: procedures = 58, calls = 105, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 217 [2023-11-19 05:03:36,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:03:36,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:03:36,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:03:36,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:03:36,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,252 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,257 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:03:36,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:03:36,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:03:36,258 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:03:36,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (1/1) ... [2023-11-19 05:03:36,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:03:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:36,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:03:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:03:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:03:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 05:03:36,365 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 05:03:36,365 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:03:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:03:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:03:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:03:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 05:03:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 05:03:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 05:03:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 05:03:36,368 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-19 05:03:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-19 05:03:36,369 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 05:03:36,369 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 05:03:36,370 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 05:03:36,371 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 05:03:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:03:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 05:03:36,372 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 05:03:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:03:36,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:03:36,494 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:03:36,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:03:36,888 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:03:37,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:03:37,039 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:03:37,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:37 BoogieIcfgContainer [2023-11-19 05:03:37,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:03:37,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:03:37,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:03:37,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:03:37,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:03:35" (1/3) ... [2023-11-19 05:03:37,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ad3cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:37, skipping insertion in model container [2023-11-19 05:03:37,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:03:36" (2/3) ... [2023-11-19 05:03:37,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ad3cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:03:37, skipping insertion in model container [2023-11-19 05:03:37,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:03:37" (3/3) ... [2023-11-19 05:03:37,076 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product48.cil.c [2023-11-19 05:03:37,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:03:37,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:03:37,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:03:37,156 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;@58f338db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:03:37,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:03:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 54 states have internal predecessors, (64), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 05:03:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 05:03:37,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:37,170 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] [2023-11-19 05:03:37,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:37,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:37,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1139753629, now seen corresponding path program 1 times [2023-11-19 05:03:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:37,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643552967] [2023-11-19 05:03:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:37,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:37,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:37,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643552967] [2023-11-19 05:03:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643552967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:37,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:37,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:03:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665556983] [2023-11-19 05:03:37,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:37,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:03:37,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:03:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:03:37,410 INFO L87 Difference]: Start difference. First operand has 72 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 54 states have internal predecessors, (64), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:03:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:37,517 INFO L93 Difference]: Finished difference Result 142 states and 193 transitions. [2023-11-19 05:03:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:03:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-19 05:03:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:37,531 INFO L225 Difference]: With dead ends: 142 [2023-11-19 05:03:37,531 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 05:03:37,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:03:37,540 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:37,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:03:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 05:03:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-19 05:03:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 50 states have internal predecessors, (56), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 05:03:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-11-19 05:03:37,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 21 [2023-11-19 05:03:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:37,598 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-11-19 05:03:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:03:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-11-19 05:03:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:03:37,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:37,602 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] [2023-11-19 05:03:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:03:37,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:37,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1002248785, now seen corresponding path program 1 times [2023-11-19 05:03:37,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:37,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347765753] [2023-11-19 05:03:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:37,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:37,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:37,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347765753] [2023-11-19 05:03:37,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347765753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:37,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:37,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:03:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98350295] [2023-11-19 05:03:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:03:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:03:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:37,745 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:03:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:37,787 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2023-11-19 05:03:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:03:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-19 05:03:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:37,790 INFO L225 Difference]: With dead ends: 106 [2023-11-19 05:03:37,790 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 05:03:37,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:37,793 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:37,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:03:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 05:03:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-19 05:03:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 05:03:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2023-11-19 05:03:37,805 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 22 [2023-11-19 05:03:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:37,805 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2023-11-19 05:03:37,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:03:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2023-11-19 05:03:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 05:03:37,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:37,807 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] [2023-11-19 05:03:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:03:37,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:37,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1733490809, now seen corresponding path program 1 times [2023-11-19 05:03:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092288632] [2023-11-19 05:03:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:37,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:37,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092288632] [2023-11-19 05:03:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092288632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:37,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:37,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:03:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366932032] [2023-11-19 05:03:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:03:37,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:03:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:37,918 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:03:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:38,015 INFO L93 Difference]: Finished difference Result 173 states and 225 transitions. [2023-11-19 05:03:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:03:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-19 05:03:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:38,019 INFO L225 Difference]: With dead ends: 173 [2023-11-19 05:03:38,022 INFO L226 Difference]: Without dead ends: 116 [2023-11-19 05:03:38,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:03:38,026 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 68 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:38,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:03:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-19 05:03:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2023-11-19 05:03:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 85 states have internal predecessors, (95), 26 states have call successors, (26), 16 states have call predecessors, (26), 16 states have return successors, (26), 19 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 05:03:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2023-11-19 05:03:38,064 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 25 [2023-11-19 05:03:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:38,064 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2023-11-19 05:03:38,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:03:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2023-11-19 05:03:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 05:03:38,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:38,068 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] [2023-11-19 05:03:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:03:38,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:38,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 195644423, now seen corresponding path program 1 times [2023-11-19 05:03:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:38,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408634754] [2023-11-19 05:03:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:38,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:38,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408634754] [2023-11-19 05:03:38,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408634754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:38,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:38,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:03:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576669800] [2023-11-19 05:03:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:38,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:03:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:03:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:03:38,294 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:03:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:38,913 INFO L93 Difference]: Finished difference Result 442 states and 595 transitions. [2023-11-19 05:03:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 05:03:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-19 05:03:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:38,927 INFO L225 Difference]: With dead ends: 442 [2023-11-19 05:03:38,928 INFO L226 Difference]: Without dead ends: 331 [2023-11-19 05:03:38,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:03:38,939 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 135 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:38,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 439 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:03:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-19 05:03:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 315. [2023-11-19 05:03:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 208 states have (on average 1.3028846153846154) internal successors, (271), 232 states have internal predecessors, (271), 57 states have call successors, (57), 47 states have call predecessors, (57), 49 states have return successors, (81), 54 states have call predecessors, (81), 57 states have call successors, (81) [2023-11-19 05:03:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 409 transitions. [2023-11-19 05:03:39,027 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 409 transitions. Word has length 28 [2023-11-19 05:03:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:39,027 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 409 transitions. [2023-11-19 05:03:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:03:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 409 transitions. [2023-11-19 05:03:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:03:39,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:39,034 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] [2023-11-19 05:03:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:03:39,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:39,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1478755698, now seen corresponding path program 1 times [2023-11-19 05:03:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194731936] [2023-11-19 05:03:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:39,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:39,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194731936] [2023-11-19 05:03:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194731936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:39,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:03:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304655843] [2023-11-19 05:03:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:03:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:03:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:03:39,549 INFO L87 Difference]: Start difference. First operand 315 states and 409 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:03:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:39,925 INFO L93 Difference]: Finished difference Result 998 states and 1334 transitions. [2023-11-19 05:03:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:03:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-11-19 05:03:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:39,932 INFO L225 Difference]: With dead ends: 998 [2023-11-19 05:03:39,932 INFO L226 Difference]: Without dead ends: 685 [2023-11-19 05:03:39,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:03:39,935 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 264 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:39,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 231 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:03:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-11-19 05:03:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 653. [2023-11-19 05:03:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 437 states have (on average 1.3043478260869565) internal successors, (570), 484 states have internal predecessors, (570), 117 states have call successors, (117), 98 states have call predecessors, (117), 98 states have return successors, (182), 104 states have call predecessors, (182), 117 states have call successors, (182) [2023-11-19 05:03:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 869 transitions. [2023-11-19 05:03:40,051 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 869 transitions. Word has length 37 [2023-11-19 05:03:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:40,052 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 869 transitions. [2023-11-19 05:03:40,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:03:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 869 transitions. [2023-11-19 05:03:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:03:40,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:40,057 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] [2023-11-19 05:03:40,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:03:40,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:40,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1463129683, now seen corresponding path program 1 times [2023-11-19 05:03:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177790099] [2023-11-19 05:03:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:40,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:40,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177790099] [2023-11-19 05:03:40,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177790099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:03:40,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:03:40,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:03:40,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582291250] [2023-11-19 05:03:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:03:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:03:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:03:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:03:40,317 INFO L87 Difference]: Start difference. First operand 653 states and 869 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 05:03:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:40,992 INFO L93 Difference]: Finished difference Result 1566 states and 2117 transitions. [2023-11-19 05:03:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 05:03:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2023-11-19 05:03:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:41,002 INFO L225 Difference]: With dead ends: 1566 [2023-11-19 05:03:41,002 INFO L226 Difference]: Without dead ends: 1161 [2023-11-19 05:03:41,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:03:41,010 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 229 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:41,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 352 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:03:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2023-11-19 05:03:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1013. [2023-11-19 05:03:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 682 states have (on average 1.2917888563049853) internal successors, (881), 755 states have internal predecessors, (881), 178 states have call successors, (178), 142 states have call predecessors, (178), 152 states have return successors, (278), 166 states have call predecessors, (278), 178 states have call successors, (278) [2023-11-19 05:03:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1337 transitions. [2023-11-19 05:03:41,186 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1337 transitions. Word has length 40 [2023-11-19 05:03:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:41,187 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1337 transitions. [2023-11-19 05:03:41,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 05:03:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1337 transitions. [2023-11-19 05:03:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:03:41,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:41,196 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:03:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:03:41,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:41,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1200365646, now seen corresponding path program 1 times [2023-11-19 05:03:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95442759] [2023-11-19 05:03:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 05:03:41,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95442759] [2023-11-19 05:03:41,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95442759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752974346] [2023-11-19 05:03:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:41,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:41,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:41,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:41,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:03:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:41,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 05:03:41,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:03:41,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:03:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752974346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826798960] [2023-11-19 05:03:41,876 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-19 05:03:41,877 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:41,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:41,887 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:41,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:47,404 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 37 for LOIs [2023-11-19 05:03:47,414 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2023-11-19 05:03:47,904 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 32 for LOIs [2023-11-19 05:03:47,910 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 21 for LOIs [2023-11-19 05:03:48,024 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 36 for LOIs [2023-11-19 05:03:48,042 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 56 for LOIs [2023-11-19 05:03:48,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:03:52,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8231#(and (= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| |timeShift_getWaterLevel_#res#1|) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2147483648)) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 0)) (<= ~pumpRunning~0 2147483647) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2147483647) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2)) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1|) (<= 0 (+ ~pumpRunning~0 2147483648)) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ ~methaneLevelCritical~0 2147483648)) (= ~switchedOnBeforeTS~0 0))' at error location [2023-11-19 05:03:52,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:03:52,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:03:52,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-19 05:03:52,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695579363] [2023-11-19 05:03:52,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:03:52,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:03:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:03:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:03:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 05:03:52,178 INFO L87 Difference]: Start difference. First operand 1013 states and 1337 transitions. Second operand has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:03:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:03:54,952 INFO L93 Difference]: Finished difference Result 5953 states and 8475 transitions. [2023-11-19 05:03:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-19 05:03:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 68 [2023-11-19 05:03:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:03:54,996 INFO L225 Difference]: With dead ends: 5953 [2023-11-19 05:03:54,996 INFO L226 Difference]: Without dead ends: 4616 [2023-11-19 05:03:55,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=552, Invalid=6930, Unknown=0, NotChecked=0, Total=7482 [2023-11-19 05:03:55,018 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 353 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:03:55,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1548 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:03:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4616 states. [2023-11-19 05:03:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4616 to 3948. [2023-11-19 05:03:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 2680 states have (on average 1.2764925373134328) internal successors, (3421), 2954 states have internal predecessors, (3421), 660 states have call successors, (660), 561 states have call predecessors, (660), 607 states have return successors, (1141), 623 states have call predecessors, (1141), 660 states have call successors, (1141) [2023-11-19 05:03:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 5222 transitions. [2023-11-19 05:03:55,485 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 5222 transitions. Word has length 68 [2023-11-19 05:03:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:03:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 3948 states and 5222 transitions. [2023-11-19 05:03:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:03:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 5222 transitions. [2023-11-19 05:03:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 05:03:55,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:03:55,506 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:03:55,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:03:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:55,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:03:55,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:03:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 494564658, now seen corresponding path program 1 times [2023-11-19 05:03:55,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:03:55,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178961892] [2023-11-19 05:03:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:03:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:03:56,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:03:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178961892] [2023-11-19 05:03:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178961892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:03:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584726983] [2023-11-19 05:03:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:03:56,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:03:56,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:03:56,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:03:56,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:03:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:03:56,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:03:56,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:03:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:03:57,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:03:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-19 05:03:57,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584726983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:03:57,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953572605] [2023-11-19 05:03:57,791 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-11-19 05:03:57,792 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:03:57,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:03:57,793 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:03:57,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:04:03,136 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 23 for LOIs [2023-11-19 05:04:03,142 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 60 for LOIs [2023-11-19 05:04:03,848 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 105 for LOIs [2023-11-19 05:04:03,960 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 21 for LOIs [2023-11-19 05:04:04,055 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 22 for LOIs [2023-11-19 05:04:04,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:04:09,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22115#(and (<= |old(~waterLevel~0)| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 0)) (<= 0 ~systemActive~0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2147483647) (= |old(~pumpRunning~0)| 0) (<= 0 (+ |old(~waterLevel~0)| 2147483648)) (<= 0 (+ ~waterLevel~0 2147483648)) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (<= ~waterLevel~0 2147483647) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~2#1| 2147483647) (= ~switchedOnBeforeTS~0 0) (<= ~systemActive~0 1))' at error location [2023-11-19 05:04:09,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:04:09,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:04:09,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 30 [2023-11-19 05:04:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260546433] [2023-11-19 05:04:09,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:04:09,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 05:04:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 05:04:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3990, Unknown=0, NotChecked=0, Total=4422 [2023-11-19 05:04:09,900 INFO L87 Difference]: Start difference. First operand 3948 states and 5222 transitions. Second operand has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 28 states have internal predecessors, (103), 16 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2023-11-19 05:04:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:17,279 INFO L93 Difference]: Finished difference Result 11056 states and 15053 transitions. [2023-11-19 05:04:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-19 05:04:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 28 states have internal predecessors, (103), 16 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) Word has length 66 [2023-11-19 05:04:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:17,282 INFO L225 Difference]: With dead ends: 11056 [2023-11-19 05:04:17,283 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:04:17,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 160 SyntacticMatches, 7 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13393 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4343, Invalid=30813, Unknown=0, NotChecked=0, Total=35156 [2023-11-19 05:04:17,328 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1641 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 1087 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1087 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:17,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 1006 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1087 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:04:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:04:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:04:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:04:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:04:17,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2023-11-19 05:04:17,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:17,332 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:04:17,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.814814814814815) internal successors, (103), 28 states have internal predecessors, (103), 16 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2023-11-19 05:04:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:04:17,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:04:17,335 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:04:17,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:17,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e963ff4c-185c-481d-8d76-03e9c7529e44/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:17,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.