./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/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_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/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_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/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 bd2232848f38516f4fb4022953e113fa5008bf5804c5e85e87585cfa28da0689 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:49:22,821 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:49:22,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:49:22,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:49:22,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:49:22,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:49:22,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:49:22,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:49:22,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:49:22,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:49:22,980 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:49:22,981 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:49:22,981 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:49:22,982 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:49:22,983 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:49:22,983 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:49:22,984 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:49:22,984 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:49:22,985 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:49:22,985 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:49:22,986 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:49:22,986 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:49:22,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:49:22,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:49:22,988 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:49:22,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:49:22,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:49:22,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:49:22,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:49:22,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:49:22,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:49:22,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:49:22,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:49:22,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:49:22,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:49:22,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:49:22,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:22,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:49:22,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:49:22,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:49:22,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:49:22,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:49:22,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:49:22,997 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:49:22,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:49:22,997 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_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd2232848f38516f4fb4022953e113fa5008bf5804c5e85e87585cfa28da0689 [2023-11-19 04:49:23,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:49:23,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:49:23,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:49:23,279 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:49:23,280 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:49:23,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c [2023-11-19 04:49:26,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:49:26,803 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:49:26,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c [2023-11-19 04:49:26,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/data/3fdc727b4/5914fa17cf5f480e879214bd688f9195/FLAG539059f1a [2023-11-19 04:49:26,832 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/data/3fdc727b4/5914fa17cf5f480e879214bd688f9195 [2023-11-19 04:49:26,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:49:26,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:49:26,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:26,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:49:26,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:49:26,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:26" (1/1) ... [2023-11-19 04:49:26,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5d0685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:26, skipping insertion in model container [2023-11-19 04:49:26,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:26" (1/1) ... [2023-11-19 04:49:26,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:49:27,240 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_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c[18533,18546] [2023-11-19 04:49:27,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:27,260 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:49:27,271 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [49] [2023-11-19 04:49:27,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [121] [2023-11-19 04:49:27,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [362] [2023-11-19 04:49:27,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [390] [2023-11-19 04:49:27,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [489] [2023-11-19 04:49:27,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [855] [2023-11-19 04:49:27,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [958] [2023-11-19 04:49:27,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [967] [2023-11-19 04:49:27,355 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_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/sv-benchmarks/c/product-lines/minepump_spec4_product54.cil.c[18533,18546] [2023-11-19 04:49:27,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:27,386 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:49:27,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27 WrapperNode [2023-11-19 04:49:27,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:27,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:27,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:49:27,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:49:27,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,470 INFO L138 Inliner]: procedures = 57, calls = 103, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 231 [2023-11-19 04:49:27,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:27,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:49:27,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:49:27,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:49:27,482 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,528 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:49:27,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:49:27,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:49:27,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:49:27,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (1/1) ... [2023-11-19 04:49:27,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:27,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:49:27,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:49:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:49:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:49:27,652 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:49:27,652 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:49:27,652 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:49:27,653 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:49:27,653 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:49:27,653 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:49:27,653 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:49:27,654 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:49:27,654 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:49:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-19 04:49:27,655 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-19 04:49:27,655 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 04:49:27,656 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 04:49:27,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:49:27,657 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:49:27,658 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:49:27,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:49:27,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:49:27,769 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:49:27,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:49:28,164 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:49:28,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:49:28,299 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:49:28,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:28 BoogieIcfgContainer [2023-11-19 04:49:28,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:49:28,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:49:28,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:49:28,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:49:28,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:49:26" (1/3) ... [2023-11-19 04:49:28,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12df17cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:28, skipping insertion in model container [2023-11-19 04:49:28,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:27" (2/3) ... [2023-11-19 04:49:28,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12df17cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:28, skipping insertion in model container [2023-11-19 04:49:28,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:28" (3/3) ... [2023-11-19 04:49:28,322 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product54.cil.c [2023-11-19 04:49:28,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:49:28,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:49:28,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:49:28,409 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;@3e3ebc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:49:28,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:49:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 04:49:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:49:28,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:28,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:28,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:28,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1067685747, now seen corresponding path program 1 times [2023-11-19 04:49:28,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:28,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876370683] [2023-11-19 04:49:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:28,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:28,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876370683] [2023-11-19 04:49:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876370683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:28,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:28,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:49:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016033169] [2023-11-19 04:49:28,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:28,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:49:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:49:28,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:49:28,732 INFO L87 Difference]: Start difference. First operand has 62 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 48 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:28,835 INFO L93 Difference]: Finished difference Result 122 states and 167 transitions. [2023-11-19 04:49:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:49:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:49:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:28,850 INFO L225 Difference]: With dead ends: 122 [2023-11-19 04:49:28,850 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 04:49:28,857 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 04:49:28,865 INFO L413 NwaCegarLoop]: 62 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, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:28,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 04:49:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-19 04:49:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 44 states have internal predecessors, (47), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 04:49:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-11-19 04:49:28,918 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 12 [2023-11-19 04:49:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:28,919 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-11-19 04:49:28,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-11-19 04:49:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:49:28,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:28,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:28,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:49:28,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:28,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 731752112, now seen corresponding path program 1 times [2023-11-19 04:49:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868576353] [2023-11-19 04:49:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:29,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868576353] [2023-11-19 04:49:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868576353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:29,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:29,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937673909] [2023-11-19 04:49:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:29,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:29,078 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:29,161 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2023-11-19 04:49:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:49:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:29,176 INFO L225 Difference]: With dead ends: 91 [2023-11-19 04:49:29,176 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 04:49:29,182 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 04:49:29,184 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:29,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 04:49:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-19 04:49:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 04:49:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2023-11-19 04:49:29,212 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 13 [2023-11-19 04:49:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:29,213 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2023-11-19 04:49:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2023-11-19 04:49:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:49:29,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:29,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:49:29,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:29,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 432809644, now seen corresponding path program 1 times [2023-11-19 04:49:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:29,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479528124] [2023-11-19 04:49:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:29,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:29,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479528124] [2023-11-19 04:49:29,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479528124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:29,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:29,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:49:29,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864408385] [2023-11-19 04:49:29,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:29,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:49:29,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:29,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:49:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:49:29,475 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:29,634 INFO L93 Difference]: Finished difference Result 152 states and 197 transitions. [2023-11-19 04:49:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:49:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 04:49:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:29,637 INFO L225 Difference]: With dead ends: 152 [2023-11-19 04:49:29,637 INFO L226 Difference]: Without dead ends: 105 [2023-11-19 04:49:29,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:29,639 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 53 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:29,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 196 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-19 04:49:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2023-11-19 04:49:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 69 states have internal predecessors, (73), 16 states have call successors, (16), 12 states have call predecessors, (16), 15 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2023-11-19 04:49:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2023-11-19 04:49:29,659 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 15 [2023-11-19 04:49:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2023-11-19 04:49:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:49:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2023-11-19 04:49:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:49:29,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:29,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:29,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:49:29,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:29,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -940471240, now seen corresponding path program 1 times [2023-11-19 04:49:29,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177679439] [2023-11-19 04:49:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:30,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177679439] [2023-11-19 04:49:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177679439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:49:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728814506] [2023-11-19 04:49:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:49:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:49:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:49:30,006 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:49:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:30,488 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2023-11-19 04:49:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:49:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-19 04:49:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:30,492 INFO L225 Difference]: With dead ends: 226 [2023-11-19 04:49:30,492 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 04:49:30,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:49:30,502 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 176 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:30,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 211 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:49:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 04:49:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 93. [2023-11-19 04:49:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 71 states have internal predecessors, (74), 17 states have call successors, (17), 13 states have call predecessors, (17), 16 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-11-19 04:49:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-11-19 04:49:30,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 18 [2023-11-19 04:49:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:30,555 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-11-19 04:49:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:49:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-11-19 04:49:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:49:30,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:30,563 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:49:30,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:49:30,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -525655786, now seen corresponding path program 1 times [2023-11-19 04:49:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758466359] [2023-11-19 04:49:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:30,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:30,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758466359] [2023-11-19 04:49:30,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758466359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:30,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:30,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997623027] [2023-11-19 04:49:30,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:30,710 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:49:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:30,756 INFO L93 Difference]: Finished difference Result 184 states and 222 transitions. [2023-11-19 04:49:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-11-19 04:49:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:30,761 INFO L225 Difference]: With dead ends: 184 [2023-11-19 04:49:30,761 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 04:49:30,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:30,765 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:30,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:49:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 04:49:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-19 04:49:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 71 states have internal predecessors, (72), 17 states have call successors, (17), 13 states have call predecessors, (17), 16 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-11-19 04:49:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2023-11-19 04:49:30,802 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 41 [2023-11-19 04:49:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:30,802 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2023-11-19 04:49:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:49:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2023-11-19 04:49:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 04:49:30,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:30,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:49:30,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:30,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash -940101069, now seen corresponding path program 1 times [2023-11-19 04:49:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:30,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404302709] [2023-11-19 04:49:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:49:30,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404302709] [2023-11-19 04:49:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404302709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:49:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250999796] [2023-11-19 04:49:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:30,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:49:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:49:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:49:30,956 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:49:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:31,039 INFO L93 Difference]: Finished difference Result 230 states and 277 transitions. [2023-11-19 04:49:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:49:31,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2023-11-19 04:49:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:31,042 INFO L225 Difference]: With dead ends: 230 [2023-11-19 04:49:31,042 INFO L226 Difference]: Without dead ends: 183 [2023-11-19 04:49:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:49:31,043 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 45 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:31,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 142 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:49:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-19 04:49:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2023-11-19 04:49:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 133 states have internal predecessors, (138), 31 states have call successors, (31), 24 states have call predecessors, (31), 30 states have return successors, (37), 26 states have call predecessors, (37), 31 states have call successors, (37) [2023-11-19 04:49:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 206 transitions. [2023-11-19 04:49:31,076 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 206 transitions. Word has length 47 [2023-11-19 04:49:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:31,076 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 206 transitions. [2023-11-19 04:49:31,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:49:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 206 transitions. [2023-11-19 04:49:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:49:31,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:31,078 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:49:31,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:49:31,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:31,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash -485174367, now seen corresponding path program 1 times [2023-11-19 04:49:31,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016608629] [2023-11-19 04:49:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:49:31,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016608629] [2023-11-19 04:49:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016608629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:31,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:31,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:49:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004102546] [2023-11-19 04:49:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:49:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:49:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:49:31,202 INFO L87 Difference]: Start difference. First operand 175 states and 206 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:49:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:31,313 INFO L93 Difference]: Finished difference Result 328 states and 414 transitions. [2023-11-19 04:49:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:49:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2023-11-19 04:49:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:31,316 INFO L225 Difference]: With dead ends: 328 [2023-11-19 04:49:31,317 INFO L226 Difference]: Without dead ends: 240 [2023-11-19 04:49:31,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:49:31,318 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 43 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:31,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 140 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-19 04:49:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2023-11-19 04:49:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 175 states have internal predecessors, (189), 36 states have call successors, (36), 35 states have call predecessors, (36), 41 states have return successors, (54), 37 states have call predecessors, (54), 36 states have call successors, (54) [2023-11-19 04:49:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 279 transitions. [2023-11-19 04:49:31,372 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 279 transitions. Word has length 50 [2023-11-19 04:49:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:31,374 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 279 transitions. [2023-11-19 04:49:31,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:49:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 279 transitions. [2023-11-19 04:49:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:49:31,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:31,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:31,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:49:31,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:31,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash 167650446, now seen corresponding path program 1 times [2023-11-19 04:49:31,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:31,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691671759] [2023-11-19 04:49:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:31,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:49:31,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691671759] [2023-11-19 04:49:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691671759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:31,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:49:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809103505] [2023-11-19 04:49:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:31,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:49:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:49:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:49:31,490 INFO L87 Difference]: Start difference. First operand 236 states and 279 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 04:49:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:31,708 INFO L93 Difference]: Finished difference Result 423 states and 508 transitions. [2023-11-19 04:49:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:49:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2023-11-19 04:49:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:31,712 INFO L225 Difference]: With dead ends: 423 [2023-11-19 04:49:31,712 INFO L226 Difference]: Without dead ends: 274 [2023-11-19 04:49:31,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:49:31,715 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 102 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:31,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 143 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-19 04:49:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2023-11-19 04:49:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 201 states have internal predecessors, (215), 36 states have call successors, (36), 35 states have call predecessors, (36), 51 states have return successors, (52), 45 states have call predecessors, (52), 36 states have call successors, (52) [2023-11-19 04:49:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 303 transitions. [2023-11-19 04:49:31,767 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 303 transitions. Word has length 55 [2023-11-19 04:49:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:31,769 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 303 transitions. [2023-11-19 04:49:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 04:49:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 303 transitions. [2023-11-19 04:49:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:49:31,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:31,775 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:49:31,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:49:31,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:31,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:31,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1106113752, now seen corresponding path program 1 times [2023-11-19 04:49:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636424876] [2023-11-19 04:49:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:49:32,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636424876] [2023-11-19 04:49:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636424876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025197670] [2023-11-19 04:49:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:32,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:32,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:49:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:32,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:49:32,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:32,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:49:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025197670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:32,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:49:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-19 04:49:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864007315] [2023-11-19 04:49:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:32,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:49:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:49:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:49:32,766 INFO L87 Difference]: Start difference. First operand 272 states and 303 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:49:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:33,220 INFO L93 Difference]: Finished difference Result 574 states and 667 transitions. [2023-11-19 04:49:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:49:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-11-19 04:49:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:33,225 INFO L225 Difference]: With dead ends: 574 [2023-11-19 04:49:33,225 INFO L226 Difference]: Without dead ends: 371 [2023-11-19 04:49:33,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:49:33,228 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:33,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 148 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:49:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-19 04:49:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 340. [2023-11-19 04:49:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 236 states have (on average 1.1567796610169492) internal successors, (273), 251 states have internal predecessors, (273), 50 states have call successors, (50), 49 states have call predecessors, (50), 53 states have return successors, (66), 49 states have call predecessors, (66), 50 states have call successors, (66) [2023-11-19 04:49:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 389 transitions. [2023-11-19 04:49:33,286 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 389 transitions. Word has length 58 [2023-11-19 04:49:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:33,287 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 389 transitions. [2023-11-19 04:49:33,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:49:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 389 transitions. [2023-11-19 04:49:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:49:33,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:33,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:33,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:33,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:33,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:33,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash -310046772, now seen corresponding path program 1 times [2023-11-19 04:49:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:33,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873642676] [2023-11-19 04:49:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:49:33,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873642676] [2023-11-19 04:49:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873642676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982756533] [2023-11-19 04:49:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:33,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:34,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:49:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:34,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 04:49:34,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:34,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:34,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982756533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582056462] [2023-11-19 04:49:34,793 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-19 04:49:34,793 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:34,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:34,803 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:34,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:40,912 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 32 for LOIs [2023-11-19 04:49:40,921 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 22 for LOIs [2023-11-19 04:49:41,077 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 27 for LOIs [2023-11-19 04:49:41,205 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 29 for LOIs [2023-11-19 04:49:41,293 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 21 for LOIs [2023-11-19 04:49:41,295 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:43,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5683#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (<= 1 |#StackHeapBarrier|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (= ~methaneLevelCritical~0 0) (= ~head~0.offset 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= ~head~0.base 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-19 04:49:43,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:49:43,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:49:43,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-11-19 04:49:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026519633] [2023-11-19 04:49:43,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:49:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 04:49:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 04:49:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 04:49:43,492 INFO L87 Difference]: Start difference. First operand 340 states and 389 transitions. Second operand has 23 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-19 04:49:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:45,500 INFO L93 Difference]: Finished difference Result 1024 states and 1213 transitions. [2023-11-19 04:49:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-19 04:49:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2023-11-19 04:49:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:45,506 INFO L225 Difference]: With dead ends: 1024 [2023-11-19 04:49:45,507 INFO L226 Difference]: Without dead ends: 802 [2023-11-19 04:49:45,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1186, Invalid=7004, Unknown=0, NotChecked=0, Total=8190 [2023-11-19 04:49:45,512 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 506 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:45,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 337 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:49:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-11-19 04:49:45,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 692. [2023-11-19 04:49:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 481 states have (on average 1.1413721413721414) internal successors, (549), 510 states have internal predecessors, (549), 104 states have call successors, (104), 96 states have call predecessors, (104), 106 states have return successors, (136), 104 states have call predecessors, (136), 104 states have call successors, (136) [2023-11-19 04:49:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 789 transitions. [2023-11-19 04:49:45,596 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 789 transitions. Word has length 61 [2023-11-19 04:49:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:45,596 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 789 transitions. [2023-11-19 04:49:45,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 10 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-19 04:49:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 789 transitions. [2023-11-19 04:49:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 04:49:45,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:45,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:45,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:45,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:49:45,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:45,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash 14912299, now seen corresponding path program 1 times [2023-11-19 04:49:45,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:45,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226485178] [2023-11-19 04:49:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:49:46,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226485178] [2023-11-19 04:49:46,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226485178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237013448] [2023-11-19 04:49:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:46,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:46,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:46,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:49:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:46,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:49:46,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:49:46,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:49:47,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237013448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:47,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088065841] [2023-11-19 04:49:47,431 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-11-19 04:49:47,431 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:47,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:47,431 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:47,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:49,563 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 16 for LOIs [2023-11-19 04:49:49,567 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-11-19 04:49:49,852 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 30 for LOIs [2023-11-19 04:49:50,006 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-19 04:49:50,061 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 18 for LOIs [2023-11-19 04:49:50,069 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 35 for LOIs [2023-11-19 04:49:50,077 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:49:52,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8568#(and (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-19 04:49:52,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:49:52,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:49:52,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 32 [2023-11-19 04:49:52,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312622005] [2023-11-19 04:49:52,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:49:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 04:49:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 04:49:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=3321, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:49:52,419 INFO L87 Difference]: Start difference. First operand 692 states and 789 transitions. Second operand has 32 states, 28 states have (on average 4.142857142857143) internal successors, (116), 28 states have internal predecessors, (116), 14 states have call successors, (22), 10 states have call predecessors, (22), 13 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2023-11-19 04:49:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:55,362 INFO L93 Difference]: Finished difference Result 1746 states and 2060 transitions. [2023-11-19 04:49:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-19 04:49:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.142857142857143) internal successors, (116), 28 states have internal predecessors, (116), 14 states have call successors, (22), 10 states have call predecessors, (22), 13 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) Word has length 79 [2023-11-19 04:49:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:55,373 INFO L225 Difference]: With dead ends: 1746 [2023-11-19 04:49:55,373 INFO L226 Difference]: Without dead ends: 1233 [2023-11-19 04:49:55,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 202 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4983 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1884, Invalid=10772, Unknown=0, NotChecked=0, Total=12656 [2023-11-19 04:49:55,381 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1040 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 465 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:49:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-11-19 04:49:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1106. [2023-11-19 04:49:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 768 states have (on average 1.140625) internal successors, (876), 815 states have internal predecessors, (876), 166 states have call successors, (166), 155 states have call predecessors, (166), 171 states have return successors, (226), 165 states have call predecessors, (226), 166 states have call successors, (226) [2023-11-19 04:49:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1268 transitions. [2023-11-19 04:49:55,544 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1268 transitions. Word has length 79 [2023-11-19 04:49:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:55,545 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1268 transitions. [2023-11-19 04:49:55,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.142857142857143) internal successors, (116), 28 states have internal predecessors, (116), 14 states have call successors, (22), 10 states have call predecessors, (22), 13 states have return successors, (21), 12 states have call predecessors, (21), 13 states have call successors, (21) [2023-11-19 04:49:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1268 transitions. [2023-11-19 04:49:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:49:55,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:55,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:55,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:55,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:49:55,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:55,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -554125096, now seen corresponding path program 2 times [2023-11-19 04:49:55,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:55,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800228735] [2023-11-19 04:49:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 04:49:56,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800228735] [2023-11-19 04:49:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800228735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794217984] [2023-11-19 04:49:56,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:49:56,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:56,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:56,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:56,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:49:56,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:49:56,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:49:56,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 04:49:56,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:56,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:49:56,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794217984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:56,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:49:56,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2023-11-19 04:49:56,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672201691] [2023-11-19 04:49:56,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:56,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:49:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:56,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:49:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:49:56,511 INFO L87 Difference]: Start difference. First operand 1106 states and 1268 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:49:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:56,791 INFO L93 Difference]: Finished difference Result 2154 states and 2514 transitions. [2023-11-19 04:49:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:49:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 91 [2023-11-19 04:49:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:56,800 INFO L225 Difference]: With dead ends: 2154 [2023-11-19 04:49:56,801 INFO L226 Difference]: Without dead ends: 1175 [2023-11-19 04:49:56,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:49:56,805 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 53 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:56,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 258 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2023-11-19 04:49:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1167. [2023-11-19 04:49:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 824 states have (on average 1.1359223300970873) internal successors, (936), 867 states have internal predecessors, (936), 175 states have call successors, (175), 166 states have call predecessors, (175), 167 states have return successors, (228), 166 states have call predecessors, (228), 175 states have call successors, (228) [2023-11-19 04:49:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1339 transitions. [2023-11-19 04:49:56,947 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1339 transitions. Word has length 91 [2023-11-19 04:49:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:56,948 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1339 transitions. [2023-11-19 04:49:56,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:49:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1339 transitions. [2023-11-19 04:49:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 04:49:56,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:56,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:49:56,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:57,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:57,167 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:57,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash -730840073, now seen corresponding path program 1 times [2023-11-19 04:49:57,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:57,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136913931] [2023-11-19 04:49:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 49 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 04:49:57,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136913931] [2023-11-19 04:49:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136913931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821652758] [2023-11-19 04:49:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:57,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:57,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:57,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:49:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:57,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 04:49:57,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:49:58,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 64 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:49:59,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821652758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:59,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242222099] [2023-11-19 04:49:59,165 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-19 04:49:59,166 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:59,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:59,167 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:59,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:50:01,239 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 142 for LOIs [2023-11-19 04:50:01,337 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 30 for LOIs [2023-11-19 04:50:01,639 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 38 for LOIs [2023-11-19 04:50:01,786 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 41 for LOIs [2023-11-19 04:50:01,898 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 16 for LOIs [2023-11-19 04:50:01,901 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 31 for LOIs [2023-11-19 04:50:01,907 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 34 for LOIs [2023-11-19 04:50:01,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:50:08,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17859#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0) (or (and (<= 0 |timeShift_isMethaneLevelCritical_#res#1|) (<= |timeShift_isMethaneAlarm_#res#1| 2147483647) (<= |timeShift_isMethaneLevelCritical_#res#1| 2147483647) (<= ~methaneLevelCritical~0 2147483647) (<= 0 |timeShift_isMethaneAlarm_#res#1|)) (and (= |old(~pumpRunning~0)| 0) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_43| Int) (|v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_38| Int)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_43| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_43| 2147483647) (or (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_38| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_38| 2147483647) (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_43| 0)) (and (= 1 ~systemActive~0) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_43| 0)))))) (= |old(~waterLevel~0)| 0) (not (= 0 ~systemActive~0)))))' at error location [2023-11-19 04:50:08,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:50:08,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:50:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 16] total 36 [2023-11-19 04:50:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522430960] [2023-11-19 04:50:08,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:50:08,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-19 04:50:08,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-19 04:50:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2023-11-19 04:50:08,810 INFO L87 Difference]: Start difference. First operand 1167 states and 1339 transitions. Second operand has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 17 states have call successors, (32), 10 states have call predecessors, (32), 15 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2023-11-19 04:50:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:11,629 INFO L93 Difference]: Finished difference Result 1538 states and 1783 transitions. [2023-11-19 04:50:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-19 04:50:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 17 states have call successors, (32), 10 states have call predecessors, (32), 15 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) Word has length 109 [2023-11-19 04:50:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:11,630 INFO L225 Difference]: With dead ends: 1538 [2023-11-19 04:50:11,631 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 04:50:11,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 267 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4235 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1831, Invalid=11741, Unknown=0, NotChecked=0, Total=13572 [2023-11-19 04:50:11,639 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 331 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:11,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 640 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:50:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 04:50:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 04:50:11,640 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 04:50:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 04:50:11,641 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2023-11-19 04:50:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:11,641 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 04:50:11,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.742857142857143) internal successors, (166), 34 states have internal predecessors, (166), 17 states have call successors, (32), 10 states have call predecessors, (32), 15 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2023-11-19 04:50:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 04:50:11,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 04:50:11,645 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 04:50:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:50:11,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ce313a7-eb4c-4b71-bd6d-b70e8083e29b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:11,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.