./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh --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 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:56:15,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:56:15,412 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:56:15,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:56:15,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:56:15,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:56:15,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:56:15,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:56:15,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:56:15,440 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:56:15,440 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:56:15,441 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:56:15,441 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:56:15,442 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:56:15,442 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:56:15,443 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:56:15,443 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:56:15,444 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:56:15,444 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:56:15,445 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:56:15,445 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:56:15,446 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:56:15,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:56:15,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:56:15,447 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:56:15,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:56:15,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:56:15,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:56:15,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:56:15,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:56:15,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:56:15,450 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:56:15,451 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:56:15,451 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:56:15,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:56:15,452 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:56:15,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:56:15,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:56:15,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:56:15,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:56:15,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:56:15,453 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:56:15,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:56:15,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:56:15,454 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:56:15,454 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:56:15,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:56:15,454 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_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63a498e40ee7fb7960293994084186ed238562f61fafb5e109bd8b394667fc1f [2023-12-02 12:56:15,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:56:15,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:56:15,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:56:15,709 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:56:15,709 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:56:15,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2023-12-02 12:56:18,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:56:18,693 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:56:18,694 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c [2023-12-02 12:56:18,706 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/data/6e474eec3/b753f0f1272a4520a79087b24303f98b/FLAG5ff918652 [2023-12-02 12:56:18,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/data/6e474eec3/b753f0f1272a4520a79087b24303f98b [2023-12-02 12:56:18,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:56:18,725 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:56:18,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:56:18,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:56:18,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:56:18,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:56:18" (1/1) ... [2023-12-02 12:56:18,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5a5224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:18, skipping insertion in model container [2023-12-02 12:56:18,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:56:18" (1/1) ... [2023-12-02 12:56:18,782 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:56:19,016 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_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2023-12-02 12:56:19,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:56:19,056 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:56:19,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [49] [2023-12-02 12:56:19,068 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [87] [2023-12-02 12:56:19,068 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [188] [2023-12-02 12:56:19,068 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [554] [2023-12-02 12:56:19,069 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [583] [2023-12-02 12:56:19,069 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [592] [2023-12-02 12:56:19,069 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [839] [2023-12-02 12:56:19,069 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [908] [2023-12-02 12:56:19,109 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_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/sv-benchmarks/c/product-lines/minepump_spec4_product60.cil.c[13463,13476] [2023-12-02 12:56:19,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:56:19,142 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:56:19,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19 WrapperNode [2023-12-02 12:56:19,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:56:19,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:56:19,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:56:19,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:56:19,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,189 INFO L138 Inliner]: procedures = 58, calls = 103, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 233 [2023-12-02 12:56:19,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:56:19,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:56:19,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:56:19,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:56:19,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:56:19,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:56:19,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:56:19,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:56:19,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (1/1) ... [2023-12-02 12:56:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:56:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:19,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:56:19,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:56:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:56:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-12-02 12:56:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-12-02 12:56:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 12:56:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 12:56:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 12:56:19,284 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 12:56:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-12-02 12:56:19,284 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-12-02 12:56:19,284 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-12-02 12:56:19,284 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-12-02 12:56:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-12-02 12:56:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-12-02 12:56:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:56:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-12-02 12:56:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-12-02 12:56:19,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:56:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:56:19,355 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:56:19,357 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:56:19,610 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:56:19,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:56:19,710 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 12:56:19,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:56:19 BoogieIcfgContainer [2023-12-02 12:56:19,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:56:19,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:56:19,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:56:19,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:56:19,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:56:18" (1/3) ... [2023-12-02 12:56:19,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2299b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:56:19, skipping insertion in model container [2023-12-02 12:56:19,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:56:19" (2/3) ... [2023-12-02 12:56:19,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2299b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:56:19, skipping insertion in model container [2023-12-02 12:56:19,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:56:19" (3/3) ... [2023-12-02 12:56:19,720 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product60.cil.c [2023-12-02 12:56:19,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:56:19,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:56:19,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:56:19,781 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;@2c4f140f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:56:19,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:56:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:56:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:56:19,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:19,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:19,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:19,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash -167949414, now seen corresponding path program 1 times [2023-12-02 12:56:19,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:19,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221698239] [2023-12-02 12:56:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:19,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:19,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221698239] [2023-12-02 12:56:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221698239] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:19,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:56:19,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759098476] [2023-12-02 12:56:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:19,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 12:56:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 12:56:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:56:19,980 INFO L87 Difference]: Start difference. First operand has 59 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 47 states have internal predecessors, (56), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) 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) [2023-12-02 12:56:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:20,039 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2023-12-02 12:56:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 12:56:20,042 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 [2023-12-02 12:56:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:20,050 INFO L225 Difference]: With dead ends: 116 [2023-12-02 12:56:20,051 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:56:20,054 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 [2023-12-02 12:56:20,058 INFO L413 NwaCegarLoop]: 59 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, 59 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:20,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:56:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:56:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 12:56:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 12:56:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2023-12-02 12:56:20,100 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 12 [2023-12-02 12:56:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:20,100 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2023-12-02 12:56:20,100 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) [2023-12-02 12:56:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2023-12-02 12:56:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:56:20,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:20,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:56:20,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:20,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -306223596, now seen corresponding path program 1 times [2023-12-02 12:56:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677921578] [2023-12-02 12:56:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:20,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677921578] [2023-12-02 12:56:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677921578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:20,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:20,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:56:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180253059] [2023-12-02 12:56:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:56:20,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:56:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:56:20,192 INFO L87 Difference]: Start difference. First operand 54 states and 71 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) [2023-12-02 12:56:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:20,231 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2023-12-02 12:56:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:56:20,231 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 [2023-12-02 12:56:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:20,233 INFO L225 Difference]: With dead ends: 80 [2023-12-02 12:56:20,233 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 12:56:20,234 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 [2023-12-02 12:56:20,235 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:20,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:56:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 12:56:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-12-02 12:56:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 12:56:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-02 12:56:20,245 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 13 [2023-12-02 12:56:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:20,245 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-02 12:56:20,246 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) [2023-12-02 12:56:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-02 12:56:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:56:20,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:20,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:56:20,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:20,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 201688176, now seen corresponding path program 1 times [2023-12-02 12:56:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:20,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312225170] [2023-12-02 12:56:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:20,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:20,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312225170] [2023-12-02 12:56:20,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312225170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:20,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:56:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009470113] [2023-12-02 12:56:20,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:20,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:56:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:56:20,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:56:20,348 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-12-02 12:56:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:20,455 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2023-12-02 12:56:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:56:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16 [2023-12-02 12:56:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:20,457 INFO L225 Difference]: With dead ends: 119 [2023-12-02 12:56:20,457 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 12:56:20,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:56:20,460 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:20,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 101 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:56:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 12:56:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-12-02 12:56:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 59 states have internal predecessors, (67), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (14), 9 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 12:56:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-12-02 12:56:20,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 16 [2023-12-02 12:56:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:20,477 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-12-02 12:56:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-12-02 12:56:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-12-02 12:56:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:56:20,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:20,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:20,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:56:20,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:20,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:20,480 INFO L85 PathProgramCache]: Analyzing trace with hash -89645741, now seen corresponding path program 1 times [2023-12-02 12:56:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:20,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243518183] [2023-12-02 12:56:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:20,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:20,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243518183] [2023-12-02 12:56:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243518183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:20,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:20,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:56:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157809916] [2023-12-02 12:56:20,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:20,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:56:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:56:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:56:20,669 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-02 12:56:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:20,807 INFO L93 Difference]: Finished difference Result 222 states and 298 transitions. [2023-12-02 12:56:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:56:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 19 [2023-12-02 12:56:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:20,810 INFO L225 Difference]: With dead ends: 222 [2023-12-02 12:56:20,811 INFO L226 Difference]: Without dead ends: 152 [2023-12-02 12:56:20,812 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 [2023-12-02 12:56:20,814 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:20,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 152 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:56:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-02 12:56:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2023-12-02 12:56:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 116 states have internal predecessors, (135), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (26), 19 states have call predecessors, (26), 21 states have call successors, (26) [2023-12-02 12:56:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2023-12-02 12:56:20,844 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 19 [2023-12-02 12:56:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:20,844 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2023-12-02 12:56:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-12-02 12:56:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2023-12-02 12:56:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:56:20,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:20,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:20,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:56:20,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:20,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2048503446, now seen corresponding path program 1 times [2023-12-02 12:56:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064940671] [2023-12-02 12:56:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:21,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064940671] [2023-12-02 12:56:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064940671] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:56:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404321537] [2023-12-02 12:56:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:56:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:56:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:56:21,034 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-12-02 12:56:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:21,457 INFO L93 Difference]: Finished difference Result 396 states and 525 transitions. [2023-12-02 12:56:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:56:21,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2023-12-02 12:56:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:21,463 INFO L225 Difference]: With dead ends: 396 [2023-12-02 12:56:21,463 INFO L226 Difference]: Without dead ends: 326 [2023-12-02 12:56:21,464 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 [2023-12-02 12:56:21,465 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 181 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:21,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 270 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:56:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-02 12:56:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2023-12-02 12:56:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 207 states have (on average 1.3043478260869565) internal successors, (270), 234 states have internal predecessors, (270), 42 states have call successors, (42), 36 states have call predecessors, (42), 41 states have return successors, (55), 40 states have call predecessors, (55), 42 states have call successors, (55) [2023-12-02 12:56:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 367 transitions. [2023-12-02 12:56:21,525 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 367 transitions. Word has length 22 [2023-12-02 12:56:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:21,525 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 367 transitions. [2023-12-02 12:56:21,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-12-02 12:56:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 367 transitions. [2023-12-02 12:56:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:56:21,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:21,529 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] [2023-12-02 12:56:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:56:21,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1529385137, now seen corresponding path program 1 times [2023-12-02 12:56:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:21,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663124876] [2023-12-02 12:56:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:21,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663124876] [2023-12-02 12:56:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663124876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:21,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:21,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:56:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356196619] [2023-12-02 12:56:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:56:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:56:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:56:21,584 INFO L87 Difference]: Start difference. First operand 291 states and 367 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:21,700 INFO L93 Difference]: Finished difference Result 589 states and 740 transitions. [2023-12-02 12:56:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:56:21,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-12-02 12:56:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:21,705 INFO L225 Difference]: With dead ends: 589 [2023-12-02 12:56:21,705 INFO L226 Difference]: Without dead ends: 300 [2023-12-02 12:56:21,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:56:21,708 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 82 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:21,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 108 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:56:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-12-02 12:56:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 277. [2023-12-02 12:56:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 198 states have (on average 1.2777777777777777) internal successors, (253), 222 states have internal predecessors, (253), 38 states have call successors, (38), 35 states have call predecessors, (38), 40 states have return successors, (44), 39 states have call predecessors, (44), 38 states have call successors, (44) [2023-12-02 12:56:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 335 transitions. [2023-12-02 12:56:21,742 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 335 transitions. Word has length 47 [2023-12-02 12:56:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:21,743 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 335 transitions. [2023-12-02 12:56:21,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 335 transitions. [2023-12-02 12:56:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:56:21,746 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:21,746 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:56:21,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:56:21,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:21,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 196163820, now seen corresponding path program 1 times [2023-12-02 12:56:21,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:21,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466571019] [2023-12-02 12:56:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:21,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:22,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:22,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466571019] [2023-12-02 12:56:22,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466571019] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:22,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:56:22,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 12:56:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164466843] [2023-12-02 12:56:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:56:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:56:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:56:22,043 INFO L87 Difference]: Start difference. First operand 277 states and 335 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:22,343 INFO L93 Difference]: Finished difference Result 421 states and 524 transitions. [2023-12-02 12:56:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:56:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2023-12-02 12:56:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:22,346 INFO L225 Difference]: With dead ends: 421 [2023-12-02 12:56:22,346 INFO L226 Difference]: Without dead ends: 275 [2023-12-02 12:56:22,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:56:22,348 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 141 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:22,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 138 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:56:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-12-02 12:56:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 220. [2023-12-02 12:56:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 156 states have (on average 1.294871794871795) internal successors, (202), 176 states have internal predecessors, (202), 31 states have call successors, (31), 28 states have call predecessors, (31), 32 states have return successors, (36), 31 states have call predecessors, (36), 31 states have call successors, (36) [2023-12-02 12:56:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2023-12-02 12:56:22,378 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 44 [2023-12-02 12:56:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:22,379 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2023-12-02 12:56:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2023-12-02 12:56:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 12:56:22,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:22,381 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] [2023-12-02 12:56:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:56:22,381 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:22,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1319794423, now seen corresponding path program 1 times [2023-12-02 12:56:22,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:22,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991592958] [2023-12-02 12:56:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:22,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991592958] [2023-12-02 12:56:22,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991592958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118826407] [2023-12-02 12:56:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:22,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:22,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:22,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:56:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:23,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:56:23,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:56:23,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:56:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118826407] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:23,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:56:23,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2023-12-02 12:56:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130303216] [2023-12-02 12:56:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:56:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:56:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:56:23,073 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:56:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:23,160 INFO L93 Difference]: Finished difference Result 345 states and 436 transitions. [2023-12-02 12:56:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:56:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2023-12-02 12:56:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:23,163 INFO L225 Difference]: With dead ends: 345 [2023-12-02 12:56:23,163 INFO L226 Difference]: Without dead ends: 256 [2023-12-02 12:56:23,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:56:23,165 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:23,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 119 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:56:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-12-02 12:56:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 251. [2023-12-02 12:56:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 179 states have (on average 1.2793296089385475) internal successors, (229), 199 states have internal predecessors, (229), 34 states have call successors, (34), 33 states have call predecessors, (34), 37 states have return successors, (42), 36 states have call predecessors, (42), 34 states have call successors, (42) [2023-12-02 12:56:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 305 transitions. [2023-12-02 12:56:23,190 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 305 transitions. Word has length 47 [2023-12-02 12:56:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:23,190 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 305 transitions. [2023-12-02 12:56:23,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:56:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 305 transitions. [2023-12-02 12:56:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 12:56:23,192 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:23,192 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:56:23,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:23,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 12:56:23,393 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:23,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -518769345, now seen corresponding path program 1 times [2023-12-02 12:56:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120588342] [2023-12-02 12:56:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 12:56:23,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120588342] [2023-12-02 12:56:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120588342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593501294] [2023-12-02 12:56:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:23,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:23,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:23,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:23,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:56:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:23,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:56:23,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:23,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:56:23,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593501294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038726818] [2023-12-02 12:56:23,870 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 12:56:23,870 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:23,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:23,879 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:23,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:26,585 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 19 for LOIs [2023-12-02 12:56:26,591 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 10 for LOIs [2023-12-02 12:56:26,661 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 9 for LOIs [2023-12-02 12:56:26,687 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2038726818] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:56:27,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:56:27,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [6, 6, 6] total 32 [2023-12-02 12:56:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774728032] [2023-12-02 12:56:27,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:56:27,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:56:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:56:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2023-12-02 12:56:27,895 INFO L87 Difference]: Start difference. First operand 251 states and 305 transitions. Second operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:31,183 INFO L93 Difference]: Finished difference Result 713 states and 912 transitions. [2023-12-02 12:56:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 12:56:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2023-12-02 12:56:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:31,188 INFO L225 Difference]: With dead ends: 713 [2023-12-02 12:56:31,188 INFO L226 Difference]: Without dead ends: 593 [2023-12-02 12:56:31,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 12:56:31,191 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 247 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:31,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 366 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 12:56:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-12-02 12:56:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 426. [2023-12-02 12:56:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 304 states have (on average 1.2828947368421053) internal successors, (390), 336 states have internal predecessors, (390), 59 states have call successors, (59), 54 states have call predecessors, (59), 62 states have return successors, (80), 64 states have call predecessors, (80), 59 states have call successors, (80) [2023-12-02 12:56:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 529 transitions. [2023-12-02 12:56:31,253 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 529 transitions. Word has length 49 [2023-12-02 12:56:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:31,253 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 529 transitions. [2023-12-02 12:56:31,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:56:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 529 transitions. [2023-12-02 12:56:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 12:56:31,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:31,256 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:56:31,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:56:31,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 12:56:31,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:31,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -681057465, now seen corresponding path program 1 times [2023-12-02 12:56:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:31,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441393838] [2023-12-02 12:56:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:31,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:56:31,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:31,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441393838] [2023-12-02 12:56:31,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441393838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:31,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857871889] [2023-12-02 12:56:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:31,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:31,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:31,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:56:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:31,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:56:31,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:56:32,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:56:32,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857871889] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:32,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95525505] [2023-12-02 12:56:32,640 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 12:56:32,641 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:32,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:32,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:32,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:40,730 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 13 for LOIs [2023-12-02 12:56:40,733 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 148 for LOIs [2023-12-02 12:56:45,234 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 157 for LOIs [2023-12-02 12:56:46,054 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 20 for LOIs [2023-12-02 12:56:46,057 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:54,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7259#(and (or (and (<= 0 |old(~waterLevel~0)|) (= |timeShift_isLowWaterLevel_#res#1| 0) (= |timeShift_isLowWaterSensorDry_#res#1| 1) (<= |old(~waterLevel~0)| 1)) (and (= |old(~pumpRunning~0)| 0) (exists ((|v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_test_~splverifierCounter~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| Int)) (and (<= |v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_27| 2147483647) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 2147483648)) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_24| 0)) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_27| 2147483648)) (<= |v_ULTIMATE.start_test_~splverifierCounter~0#1_BEFORE_CALL_27| 3))) (= |old(~waterLevel~0)| 0))) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-12-02 12:56:54,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:54,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:56:54,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 34 [2023-12-02 12:56:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669470055] [2023-12-02 12:56:54,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 12:56:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 12:56:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3498, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 12:56:54,354 INFO L87 Difference]: Start difference. First operand 426 states and 529 transitions. Second operand has 34 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2023-12-02 12:57:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:02,657 INFO L93 Difference]: Finished difference Result 4164 states and 5716 transitions. [2023-12-02 12:57:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2023-12-02 12:57:02,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) Word has length 52 [2023-12-02 12:57:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:02,688 INFO L225 Difference]: With dead ends: 4164 [2023-12-02 12:57:02,688 INFO L226 Difference]: Without dead ends: 3859 [2023-12-02 12:57:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22143 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=5909, Invalid=49081, Unknown=0, NotChecked=0, Total=54990 [2023-12-02 12:57:02,714 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2030 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 4044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:02,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 1741 Invalid, 4044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 12:57:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2023-12-02 12:57:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 2793. [2023-12-02 12:57:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2052 states have (on average 1.3011695906432748) internal successors, (2670), 2195 states have internal predecessors, (2670), 365 states have call successors, (365), 317 states have call predecessors, (365), 375 states have return successors, (622), 385 states have call predecessors, (622), 365 states have call successors, (622) [2023-12-02 12:57:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3657 transitions. [2023-12-02 12:57:03,082 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3657 transitions. Word has length 52 [2023-12-02 12:57:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:03,083 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 3657 transitions. [2023-12-02 12:57:03,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2023-12-02 12:57:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3657 transitions. [2023-12-02 12:57:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 12:57:03,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:03,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:03,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:57:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:57:03,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:03,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1615068099, now seen corresponding path program 1 times [2023-12-02 12:57:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518819169] [2023-12-02 12:57:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:57:04,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518819169] [2023-12-02 12:57:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518819169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935519636] [2023-12-02 12:57:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:04,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:04,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:04,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:04,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:57:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:04,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:57:04,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:57:04,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 12:57:04,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935519636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:04,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674475307] [2023-12-02 12:57:04,287 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 12:57:04,287 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:04,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:04,287 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:04,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:06,727 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 14 for LOIs [2023-12-02 12:57:06,730 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 12 for LOIs [2023-12-02 12:57:06,783 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 12 for LOIs [2023-12-02 12:57:06,809 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 3 for LOIs [2023-12-02 12:57:06,811 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:09,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17106#(and (<= 0 ~systemActive~0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= ~systemActive~0 1))' at error location [2023-12-02 12:57:09,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:09,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:57:09,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 24 [2023-12-02 12:57:09,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748776157] [2023-12-02 12:57:09,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:09,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:57:09,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:09,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:57:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 12:57:09,267 INFO L87 Difference]: Start difference. First operand 2793 states and 3657 transitions. Second operand has 24 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-02 12:57:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:12,231 INFO L93 Difference]: Finished difference Result 9200 states and 12811 transitions. [2023-12-02 12:57:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-02 12:57:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 69 [2023-12-02 12:57:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:12,275 INFO L225 Difference]: With dead ends: 9200 [2023-12-02 12:57:12,275 INFO L226 Difference]: Without dead ends: 6993 [2023-12-02 12:57:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4916 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1686, Invalid=12120, Unknown=0, NotChecked=0, Total=13806 [2023-12-02 12:57:12,288 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 875 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 647 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 12:57:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2023-12-02 12:57:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 4187. [2023-12-02 12:57:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 3079 states have (on average 1.2711919454368301) internal successors, (3914), 3291 states have internal predecessors, (3914), 519 states have call successors, (519), 468 states have call predecessors, (519), 588 states have return successors, (983), 558 states have call predecessors, (983), 519 states have call successors, (983) [2023-12-02 12:57:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5416 transitions. [2023-12-02 12:57:12,918 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5416 transitions. Word has length 69 [2023-12-02 12:57:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:12,919 INFO L495 AbstractCegarLoop]: Abstraction has 4187 states and 5416 transitions. [2023-12-02 12:57:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.681818181818182) internal successors, (103), 21 states have internal predecessors, (103), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-02 12:57:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5416 transitions. [2023-12-02 12:57:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:57:12,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:12,926 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:12,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:57:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 12:57:13,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:13,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1193771306, now seen corresponding path program 2 times [2023-12-02 12:57:13,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:13,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062058290] [2023-12-02 12:57:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:13,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062058290] [2023-12-02 12:57:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062058290] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827287929] [2023-12-02 12:57:13,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:57:13,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:13,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:13,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:57:13,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:57:13,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:13,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:57:13,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:57:13,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:57:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827287929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:57:13,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:57:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2023-12-02 12:57:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718189578] [2023-12-02 12:57:13,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:57:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:57:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:57:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:57:13,897 INFO L87 Difference]: Start difference. First operand 4187 states and 5416 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:57:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:14,319 INFO L93 Difference]: Finished difference Result 5828 states and 7628 transitions. [2023-12-02 12:57:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:57:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 77 [2023-12-02 12:57:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:14,335 INFO L225 Difference]: With dead ends: 5828 [2023-12-02 12:57:14,335 INFO L226 Difference]: Without dead ends: 3289 [2023-12-02 12:57:14,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:57:14,342 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 48 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:14,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 248 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:57:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2023-12-02 12:57:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2988. [2023-12-02 12:57:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2197 states have (on average 1.2526172052799271) internal successors, (2752), 2359 states have internal predecessors, (2752), 376 states have call successors, (376), 355 states have call predecessors, (376), 414 states have return successors, (543), 396 states have call predecessors, (543), 376 states have call successors, (543) [2023-12-02 12:57:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 3671 transitions. [2023-12-02 12:57:14,809 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 3671 transitions. Word has length 77 [2023-12-02 12:57:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:14,810 INFO L495 AbstractCegarLoop]: Abstraction has 2988 states and 3671 transitions. [2023-12-02 12:57:14,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 12:57:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 3671 transitions. [2023-12-02 12:57:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 12:57:14,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:14,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:14,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:57:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 12:57:15,019 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:15,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -364154996, now seen corresponding path program 1 times [2023-12-02 12:57:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:15,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253392613] [2023-12-02 12:57:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 82 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:57:15,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253392613] [2023-12-02 12:57:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253392613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270701634] [2023-12-02 12:57:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:15,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:15,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:57:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:16,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:57:16,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 12:57:16,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-02 12:57:16,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270701634] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:16,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:16,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22, 6] total 27 [2023-12-02 12:57:16,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905789870] [2023-12-02 12:57:16,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:57:16,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:57:16,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:16,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:57:16,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-12-02 12:57:16,222 INFO L87 Difference]: Start difference. First operand 2988 states and 3671 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:57:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:16,589 INFO L93 Difference]: Finished difference Result 4087 states and 5114 transitions. [2023-12-02 12:57:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:57:16,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 89 [2023-12-02 12:57:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:16,603 INFO L225 Difference]: With dead ends: 4087 [2023-12-02 12:57:16,603 INFO L226 Difference]: Without dead ends: 3207 [2023-12-02 12:57:16,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-12-02 12:57:16,606 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 54 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:16,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 136 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:57:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2023-12-02 12:57:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2841. [2023-12-02 12:57:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2075 states have (on average 1.2448192771084337) internal successors, (2583), 2240 states have internal predecessors, (2583), 364 states have call successors, (364), 344 states have call predecessors, (364), 401 states have return successors, (505), 379 states have call predecessors, (505), 364 states have call successors, (505) [2023-12-02 12:57:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 3452 transitions. [2023-12-02 12:57:16,879 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 3452 transitions. Word has length 89 [2023-12-02 12:57:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:16,879 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 3452 transitions. [2023-12-02 12:57:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:57:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 3452 transitions. [2023-12-02 12:57:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 12:57:16,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:16,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:57:16,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:57:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:17,093 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 633810987, now seen corresponding path program 1 times [2023-12-02 12:57:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212743574] [2023-12-02 12:57:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 44 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:17,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212743574] [2023-12-02 12:57:17,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212743574] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600771085] [2023-12-02 12:57:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:17,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:17,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:57:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:17,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 12:57:17,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 80 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 12:57:18,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 53 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 12:57:18,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600771085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700463426] [2023-12-02 12:57:18,437 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-12-02 12:57:18,437 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:18,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:18,438 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:18,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:26,679 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 13 for LOIs [2023-12-02 12:57:26,682 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 148 for LOIs [2023-12-02 12:57:32,127 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 157 for LOIs [2023-12-02 12:57:32,943 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 20 for LOIs [2023-12-02 12:57:32,945 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 23 for LOIs [2023-12-02 12:57:32,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:41,656 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55885#(and (or (and (<= 0 |timeShift_isLowWaterSensorDry_#res#1|) (<= |timeShift_isLowWaterSensorDry_#res#1| 1) (<= |timeShift_isLowWaterLevel_#res#1| 1) (<= 0 |timeShift_isLowWaterLevel_#res#1|)) (and (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_test_~splverifierCounter~0#1_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_61| Int)) (and (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_52| 2147483647) (<= |v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_61| 2147483647) (<= |v_ULTIMATE.start_test_~splverifierCounter~0#1_BEFORE_CALL_61| 3) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_52| 2147483648)) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_52| 0)) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~10#1_BEFORE_CALL_61| 2147483648)))) (= |old(~pumpRunning~0)| 0) (= |old(~waterLevel~0)| 0))) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~4#1| 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-12-02 12:57:41,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:41,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:57:41,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 8] total 33 [2023-12-02 12:57:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352700794] [2023-12-02 12:57:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 12:57:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 12:57:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=3787, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 12:57:41,659 INFO L87 Difference]: Start difference. First operand 2841 states and 3452 transitions. Second operand has 33 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 13 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2023-12-02 12:57:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:44,962 INFO L93 Difference]: Finished difference Result 5961 states and 7758 transitions. [2023-12-02 12:57:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-12-02 12:57:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 13 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) Word has length 94 [2023-12-02 12:57:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:44,963 INFO L225 Difference]: With dead ends: 5961 [2023-12-02 12:57:44,963 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 12:57:44,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1780, Invalid=13970, Unknown=0, NotChecked=0, Total=15750 [2023-12-02 12:57:44,975 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1203 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:44,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 1153 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 12:57:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 12:57:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 12:57:44,976 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) [2023-12-02 12:57:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 12:57:44,977 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2023-12-02 12:57:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:44,977 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 12:57:44,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 13 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2023-12-02 12:57:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 12:57:44,978 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 12:57:44,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 12:57:44,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:57:45,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:45,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 12:58:24,657 WARN L293 SmtUtils]: Spent 22.92s on a formula simplification. DAG size of input: 843 DAG size of output: 416 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 12:58:54,056 INFO L899 garLoopResultBuilder]: For program point deactivatePumpEXIT(lines 714 721) no Hoare annotation was computed. [2023-12-02 12:58:54,057 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 714 721) the Hoare annotation is: (let ((.cse0 (= ~pumpRunning~0 |old(~pumpRunning~0)|))) (and (or (not (= ~waterLevel~0 1)) .cse0 (= |old(~pumpRunning~0)| 0) (= 0 ~systemActive~0)) (or .cse0 (< ~waterLevel~0 2)))) [2023-12-02 12:58:54,057 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__baseEXIT(lines 629 635) no Hoare annotation was computed. [2023-12-02 12:58:54,057 INFO L902 garLoopResultBuilder]: At program point processEnvironment__wrappee__baseFINAL(lines 629 635) the Hoare annotation is: true [2023-12-02 12:58:54,057 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 935 946) the Hoare annotation is: (let ((.cse0 (not (= ~pumpRunning~0 0))) (.cse1 (= |old(~methaneLevelCritical~0)| ~methaneLevelCritical~0)) (.cse2 (< ~waterLevel~0 2))) (and (or (not (= ~waterLevel~0 1)) .cse0 .cse1) (or (and (= |old(~methaneLevelCritical~0)| 0) (not (= ~pumpRunning~0 1))) .cse1 .cse2 (= 0 ~systemActive~0)) (or .cse0 .cse1 .cse2))) [2023-12-02 12:58:54,057 INFO L899 garLoopResultBuilder]: For program point changeMethaneLevelEXIT(lines 935 946) no Hoare annotation was computed. [2023-12-02 12:58:54,057 INFO L899 garLoopResultBuilder]: For program point L609-1(lines 608 627) no Hoare annotation was computed. [2023-12-02 12:58:54,057 INFO L899 garLoopResultBuilder]: For program point L671(lines 671 679) no Hoare annotation was computed. [2023-12-02 12:58:54,057 INFO L899 garLoopResultBuilder]: For program point L667(lines 667 684) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L895 garLoopResultBuilder]: At program point L677(line 677) the Hoare annotation is: (let ((.cse0 (< |old(~waterLevel~0)| 2)) (.cse1 (not (= |old(~pumpRunning~0)| 0)))) (and (or .cse0 (= 0 ~systemActive~0)) (or .cse1 .cse0) (or .cse1 (not (= |old(~waterLevel~0)| 1))))) [2023-12-02 12:58:54,058 INFO L895 garLoopResultBuilder]: At program point L673(line 673) the Hoare annotation is: (and (or (< |old(~waterLevel~0)| 2) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) (= |old(~waterLevel~0)| (+ ~waterLevel~0 1)) (<= 1 |timeShift_processEnvironment_~tmp~6#1|)) (= 0 ~systemActive~0)) (or (not (= |old(~pumpRunning~0)| 0)) (<= |old(~waterLevel~0)| 0))) [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L570(lines 570 576) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L566(lines 566 579) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L566-1(lines 558 582) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L895 garLoopResultBuilder]: At program point L682(line 682) the Hoare annotation is: (let ((.cse5 (= |old(~pumpRunning~0)| 0)) (.cse7 (= 0 ~systemActive~0))) (let ((.cse2 (not .cse7)) (.cse1 (< |old(~waterLevel~0)| 2)) (.cse0 (not .cse5)) (.cse4 (= ~pumpRunning~0 0)) (.cse6 (= |old(~waterLevel~0)| ~waterLevel~0)) (.cse3 (not (= |old(~waterLevel~0)| 1)))) (and (or .cse0 .cse1 .cse2) (or .cse0 .cse3 .cse2) (or .cse1 (and .cse4 .cse5 .cse6) .cse7) (or .cse0 (and .cse4 .cse6) .cse3)))) [2023-12-02 12:58:54,058 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 605 628) the Hoare annotation is: (let ((.cse0 (= |old(~waterLevel~0)| ~waterLevel~0))) (and (or (not (= |old(~pumpRunning~0)| 0)) (and (= ~pumpRunning~0 0) .cse0) (and (not (= |old(~waterLevel~0)| 1)) (<= |old(~waterLevel~0)| 1))) (or (< |old(~waterLevel~0)| 2) (and (= ~pumpRunning~0 |old(~pumpRunning~0)|) .cse0) (= 0 ~systemActive~0)))) [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L682-1(lines 663 687) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L616-1(lines 616 622) no Hoare annotation was computed. [2023-12-02 12:58:54,058 INFO L899 garLoopResultBuilder]: For program point L588(line 588) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point timeShiftEXIT(lines 605 628) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION(line 588) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L902 garLoopResultBuilder]: At program point L96(line 96) the Hoare annotation is: true [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point cleanupEXIT(lines 90 119) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point L96-1(line 96) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point L115(lines 90 119) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point L111(line 111) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 90 119) the Hoare annotation is: true [2023-12-02 12:58:54,059 INFO L899 garLoopResultBuilder]: For program point L104(lines 104 108) no Hoare annotation was computed. [2023-12-02 12:58:54,059 INFO L902 garLoopResultBuilder]: At program point L104-1(lines 104 108) the Hoare annotation is: true [2023-12-02 12:58:54,059 INFO L902 garLoopResultBuilder]: At program point L100-2(lines 100 114) the Hoare annotation is: true [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L820(lines 820 826) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L820-1(lines 820 826) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L903(lines 840 907) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L870(lines 870 876) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L870-1(lines 870 876) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L895 garLoopResultBuilder]: At program point L862(line 862) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~tmp~0#1| 1)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) (or (< 1 ~waterLevel~0) (= ~waterLevel~0 1)) .cse0 .cse1) (and .cse0 (or (not (= ~methaneLevelCritical~0 0)) (= ~pumpRunning~0 1)) (<= 2 ~waterLevel~0) .cse1 (not (= 0 ~systemActive~0))))) [2023-12-02 12:58:54,060 INFO L895 garLoopResultBuilder]: At program point L900(lines 849 901) the Hoare annotation is: false [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L888(lines 888 894) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L895 garLoopResultBuilder]: At program point L822(line 822) the Hoare annotation is: (and (= |ULTIMATE.start_main_~tmp~0#1| 1) (<= 2 ~waterLevel~0) (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0)) [2023-12-02 12:58:54,060 INFO L895 garLoopResultBuilder]: At program point L888-2(lines 880 895) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~tmp~0#1| 1)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) (or (< 1 ~waterLevel~0) (= ~waterLevel~0 1)) .cse0 .cse1) (and .cse0 (<= 2 ~waterLevel~0) .cse1 (not (= 0 ~systemActive~0))))) [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L851(lines 850 899) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point L880(lines 880 895) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 12:58:54,060 INFO L895 garLoopResultBuilder]: At program point L872(line 872) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~tmp~0#1| 1)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) (or (< 1 ~waterLevel~0) (= ~waterLevel~0 1)) .cse0 .cse1) (and .cse0 (or (not (= ~methaneLevelCritical~0 0)) (= ~pumpRunning~0 1)) (<= 2 ~waterLevel~0) .cse1 (not (= 0 ~systemActive~0))))) [2023-12-02 12:58:54,061 INFO L895 garLoopResultBuilder]: At program point L897(lines 850 899) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~tmp~0#1| 1)) (.cse1 (= |ULTIMATE.start_test_~splverifierCounter~0#1| 0))) (or (and (= ~pumpRunning~0 0) (or (< 1 ~waterLevel~0) (= ~waterLevel~0 1)) .cse0 .cse1) (and .cse0 (or (not (= ~methaneLevelCritical~0 0)) (= ~pumpRunning~0 1)) (<= 2 ~waterLevel~0) .cse1 (not (= 0 ~systemActive~0))))) [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L860(lines 860 866) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L860-1(lines 860 866) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L175(lines 175 182) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L175-2(lines 175 182) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L895 garLoopResultBuilder]: At program point L651(line 651) the Hoare annotation is: (let ((.cse1 (= 0 ~systemActive~0)) (.cse0 (not (= |old(~pumpRunning~0)| 0))) (.cse2 (= ~waterLevel~0 0))) (and (or (not (= ~waterLevel~0 1)) .cse0 (= |processEnvironment__wrappee__highWaterSensor_~tmp~5#1| 0) .cse1) (or .cse0 (<= ~waterLevel~0 1) .cse1) (or .cse0 (= ~pumpRunning~0 0) .cse1 .cse2) (or .cse0 (not (= 1 ~systemActive~0)) (and (= |processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1| 0) (= |processEnvironment__wrappee__highWaterSensor_~tmp~5#1| |processEnvironment__wrappee__highWaterSensor_isHighWaterLevel_#res#1|) (= |processEnvironment__wrappee__highWaterSensor_isHighWaterSensorDry_#res#1| 1)) .cse2))) [2023-12-02 12:58:54,061 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 637 661) the Hoare annotation is: (or (not (= |old(~pumpRunning~0)| 0)) (= ~pumpRunning~0 0) (= 0 ~systemActive~0) (= ~waterLevel~0 0)) [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L645(lines 645 653) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L641(lines 641 658) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point processEnvironment__wrappee__highWaterSensorEXIT(lines 637 661) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L895 garLoopResultBuilder]: At program point L656(line 656) the Hoare annotation is: (or (not (= |old(~pumpRunning~0)| 0)) (= 0 ~systemActive~0) (= ~waterLevel~0 0)) [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point L656-1(lines 637 661) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L899 garLoopResultBuilder]: For program point waterRiseEXIT(lines 923 934) no Hoare annotation was computed. [2023-12-02 12:58:54,061 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 923 934) the Hoare annotation is: (let ((.cse0 (= |old(~waterLevel~0)| ~waterLevel~0))) (and (or (< |old(~waterLevel~0)| 2) (and (= ~methaneLevelCritical~0 0) (not (= ~pumpRunning~0 1))) .cse0 (= 0 ~systemActive~0)) (or (not (= ~pumpRunning~0 0)) (and (not (= |old(~waterLevel~0)| 1)) (<= |old(~waterLevel~0)| 1)) .cse0))) [2023-12-02 12:58:54,063 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:54,065 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:58:54,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:58:54 BoogieIcfgContainer [2023-12-02 12:58:54,076 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:58:54,077 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:58:54,077 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:58:54,077 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:58:54,077 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:56:19" (3/4) ... [2023-12-02 12:58:54,079 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 12:58:54,081 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure deactivatePump [2023-12-02 12:58:54,081 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__base [2023-12-02 12:58:54,081 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure changeMethaneLevel [2023-12-02 12:58:54,081 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure timeShift [2023-12-02 12:58:54,081 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure cleanup [2023-12-02 12:58:54,082 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure processEnvironment__wrappee__highWaterSensor [2023-12-02 12:58:54,082 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure waterRise [2023-12-02 12:58:54,089 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 47 nodes and edges [2023-12-02 12:58:54,089 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-12-02 12:58:54,090 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 12:58:54,091 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 12:58:54,091 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 12:58:54,115 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!((\old(pumpRunning) == 0)) || ((pumpRunning == 0) && (\old(waterLevel) == waterLevel))) || (!((\old(waterLevel) == 1)) && (\old(waterLevel) <= 1))) && (((\old(waterLevel) < 2) || ((pumpRunning == \old(pumpRunning)) && (\old(waterLevel) == waterLevel))) || (0 == systemActive))) [2023-12-02 12:58:54,148 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!((\old(pumpRunning) == 0)) || ((pumpRunning == 0) && (\old(waterLevel) == waterLevel))) || (!((\old(waterLevel) == 1)) && (\old(waterLevel) <= 1))) && (((\old(waterLevel) < 2) || ((pumpRunning == \old(pumpRunning)) && (\old(waterLevel) == waterLevel))) || (0 == systemActive))) [2023-12-02 12:58:54,191 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:58:54,192 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 12:58:54,192 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:58:54,193 INFO L158 Benchmark]: Toolchain (without parser) took 155467.89ms. Allocated memory was 140.5MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 101.8MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 262.3MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,193 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory is still 108.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:58:54,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 416.85ms. Allocated memory is still 140.5MB. Free memory was 101.5MB in the beginning and 81.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.12ms. Allocated memory is still 140.5MB. Free memory was 81.9MB in the beginning and 79.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,194 INFO L158 Benchmark]: Boogie Preprocessor took 32.17ms. Allocated memory is still 140.5MB. Free memory was 79.4MB in the beginning and 77.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,194 INFO L158 Benchmark]: RCFGBuilder took 488.93ms. Allocated memory is still 140.5MB. Free memory was 77.7MB in the beginning and 99.1MB in the end (delta: -21.4MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,195 INFO L158 Benchmark]: TraceAbstraction took 154361.99ms. Allocated memory was 140.5MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 99.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 862.0MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,195 INFO L158 Benchmark]: Witness Printer took 115.43ms. Allocated memory is still 1.4GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 12:58:54,197 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory is still 108.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 416.85ms. Allocated memory is still 140.5MB. Free memory was 101.5MB in the beginning and 81.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.12ms. Allocated memory is still 140.5MB. Free memory was 81.9MB in the beginning and 79.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.17ms. Allocated memory is still 140.5MB. Free memory was 79.4MB in the beginning and 77.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 488.93ms. Allocated memory is still 140.5MB. Free memory was 77.7MB in the beginning and 99.1MB in the end (delta: -21.4MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * TraceAbstraction took 154361.99ms. Allocated memory was 140.5MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 99.1MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 862.0MB. Max. memory is 16.1GB. * Witness Printer took 115.43ms. Allocated memory is still 1.4GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 49]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [49] - GenericResultAtLocation [Line: 87]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [87] - GenericResultAtLocation [Line: 188]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [188] - GenericResultAtLocation [Line: 554]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [554] - GenericResultAtLocation [Line: 583]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [583] - GenericResultAtLocation [Line: 592]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [592] - GenericResultAtLocation [Line: 839]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [839] - GenericResultAtLocation [Line: 908]: Unsoundness Warning Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [908] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 588]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 154.3s, OverallIterations: 14, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 20.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 68.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5126 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5073 mSDsluCounter, 5312 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4466 mSDsCounter, 2830 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8328 IncrementalHoareTripleChecker+Invalid, 11158 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2830 mSolverCounterUnsat, 846 mSDtfsCounter, 8328 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1655 GetRequests, 1040 SyntacticMatches, 1 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33630 ImplicationChecksByTransitivity, 33.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4187occurred in iteration=11, InterpolantAutomatonStates: 421, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 4836 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 3897 PreInvPairs, 4432 NumberOfFragments, 502 HoareAnnotationTreeSize, 3897 FomulaSimplifications, 1018179 FormulaSimplificationTreeSizeReduction, 39.6s HoareSimplificationTime, 21 FomulaSimplificationsInter, 416635 FormulaSimplificationTreeSizeReductionInter, 28.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 1127 NumberOfCodeBlocks, 1102 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1454 ConstructedInterpolants, 0 QuantifiedInterpolants, 5852 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1878 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 727/1024 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 40, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 21, TOOLS_POST_CALL_TIME: 0.7s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.7s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 97, TOOLS_QUANTIFIERELIM_TIME: 2.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 123, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 23, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 40, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.1s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 536, DAG_COMPRESSION_RETAINED_NODES: 104, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 849]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 850]: Loop Invariant Derived loop invariant: (((((pumpRunning == 0) && ((1 < waterLevel) || (waterLevel == 1))) && (tmp == 1)) && (splverifierCounter == 0)) || (((((tmp == 1) && (!((methaneLevelCritical == 0)) || (pumpRunning == 1))) && (2 <= waterLevel)) && (splverifierCounter == 0)) && !((0 == systemActive)))) - InvariantResult [Line: 605]: Loop Invariant Derived loop invariant: (((!((\old(pumpRunning) == 0)) || ((pumpRunning == 0) && (\old(waterLevel) == waterLevel))) || (!((\old(waterLevel) == 1)) && (\old(waterLevel) <= 1))) && (((\old(waterLevel) < 2) || ((pumpRunning == \old(pumpRunning)) && (\old(waterLevel) == waterLevel))) || (0 == systemActive))) - InvariantResult [Line: 100]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-12-02 12:58:54,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_282c9dc2-32a7-4f1e-b5a0-0fdb9a97f52c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE