./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 88f09ec5af0f641c9edfe2f7047937341e46c7f8baabeed0fd38f069cd3b5278 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:26,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:26,592 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:26,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:26,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:26,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:26,631 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:26,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:26,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:26,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:26,639 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:26,640 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:26,640 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:26,642 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:26,642 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:26,643 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:26,643 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:26,644 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:26,644 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:26,645 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:26,645 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:26,646 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:26,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:26,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:26,648 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:26,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:26,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:26,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:26,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:26,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:26,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:26,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:26,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:26,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:26,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:26,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:26,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:26,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:26,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:26,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:26,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:26,655 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:26,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:26,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:26,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:26,656 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:26,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:26,657 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_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 88f09ec5af0f641c9edfe2f7047937341e46c7f8baabeed0fd38f069cd3b5278 [2023-11-23 21:31:26,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:26,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:26,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:26,998 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:26,998 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:27,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c [2023-11-23 21:31:30,219 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:30,565 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:30,565 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c [2023-11-23 21:31:30,580 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/data/593d4b4e0/16c1c930ce5d454bae4d85698c404931/FLAG5aef1766a [2023-11-23 21:31:30,595 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/data/593d4b4e0/16c1c930ce5d454bae4d85698c404931 [2023-11-23 21:31:30,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:30,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:30,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:30,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:30,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:30,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:30" (1/1) ... [2023-11-23 21:31:30,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d741520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:30, skipping insertion in model container [2023-11-23 21:31:30,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:30" (1/1) ... [2023-11-23 21:31:30,668 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:30,874 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_9fca56a0-da1c-4f54-a949-4520e749a236/sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c[3971,3984] [2023-11-23 21:31:30,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:30,995 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:31,006 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [49] [2023-11-23 21:31:31,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [101] [2023-11-23 21:31:31,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [211] [2023-11-23 21:31:31,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [220] [2023-11-23 21:31:31,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [323] [2023-11-23 21:31:31,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [560] [2023-11-23 21:31:31,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [627] [2023-11-23 21:31:31,010 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [662] [2023-11-23 21:31:31,022 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_9fca56a0-da1c-4f54-a949-4520e749a236/sv-benchmarks/c/product-lines/minepump_spec5_product54.cil.c[3971,3984] [2023-11-23 21:31:31,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:31,126 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:31,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31 WrapperNode [2023-11-23 21:31:31,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:31,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:31,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:31,128 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:31,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,191 INFO L138 Inliner]: procedures = 59, calls = 106, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 236 [2023-11-23 21:31:31,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:31,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:31,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:31,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:31,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,227 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:31,228 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:31,228 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:31,228 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:31,229 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (1/1) ... [2023-11-23 21:31:31,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:31,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:31,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:31:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:31:31,337 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:31:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:31:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:31:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:31:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:31:31,339 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:31:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:31:31,340 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:31:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 21:31:31,341 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 21:31:31,341 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-23 21:31:31,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-23 21:31:31,342 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:31:31,343 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:31:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:31,346 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:31:31,346 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:31:31,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:31,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:31,444 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:31,447 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:31,867 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:32,053 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:32,053 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:31:32,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:32 BoogieIcfgContainer [2023-11-23 21:31:32,055 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:32,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:32,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:32,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:32,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:30" (1/3) ... [2023-11-23 21:31:32,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed9807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:32, skipping insertion in model container [2023-11-23 21:31:32,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:31" (2/3) ... [2023-11-23 21:31:32,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed9807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:32, skipping insertion in model container [2023-11-23 21:31:32,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:32" (3/3) ... [2023-11-23 21:31:32,065 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product54.cil.c [2023-11-23 21:31:32,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:32,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:32,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:32,138 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;@35cc4b3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:32,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 21:31:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:31:32,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:32,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:32,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:32,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash 940925143, now seen corresponding path program 1 times [2023-11-23 21:31:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466995485] [2023-11-23 21:31:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:32,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466995485] [2023-11-23 21:31:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466995485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:32,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:31:32,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114353955] [2023-11-23 21:31:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:31:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:31:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:31:32,411 INFO L87 Difference]: Start difference. First operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:32,541 INFO L93 Difference]: Finished difference Result 136 states and 185 transitions. [2023-11-23 21:31:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:31:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 21:31:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:32,558 INFO L225 Difference]: With dead ends: 136 [2023-11-23 21:31:32,559 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 21:31:32,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:31:32,570 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:32,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 21:31:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-23 21:31:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:31:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2023-11-23 21:31:32,639 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 21 [2023-11-23 21:31:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:32,640 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2023-11-23 21:31:32,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2023-11-23 21:31:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:31:32,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:32,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:32,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:32,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -906402642, now seen corresponding path program 1 times [2023-11-23 21:31:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:32,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893413313] [2023-11-23 21:31:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:32,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:32,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893413313] [2023-11-23 21:31:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893413313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:32,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:32,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:31:32,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208271478] [2023-11-23 21:31:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:32,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:32,996 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:33,224 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2023-11-23 21:31:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:31:33,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-23 21:31:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:33,228 INFO L225 Difference]: With dead ends: 174 [2023-11-23 21:31:33,228 INFO L226 Difference]: Without dead ends: 112 [2023-11-23 21:31:33,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:31:33,232 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 50 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:33,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 326 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:33,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-23 21:31:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2023-11-23 21:31:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 78 states have internal predecessors, (88), 24 states have call successors, (24), 17 states have call predecessors, (24), 15 states have return successors, (32), 20 states have call predecessors, (32), 22 states have call successors, (32) [2023-11-23 21:31:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2023-11-23 21:31:33,258 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 24 [2023-11-23 21:31:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:33,259 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2023-11-23 21:31:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:31:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2023-11-23 21:31:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:31:33,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:33,275 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:33,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:33,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash 14817225, now seen corresponding path program 1 times [2023-11-23 21:31:33,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:33,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607254796] [2023-11-23 21:31:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:33,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607254796] [2023-11-23 21:31:33,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607254796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:33,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:33,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181137019] [2023-11-23 21:31:33,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:33,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:33,427 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:31:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:33,496 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2023-11-23 21:31:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 21:31:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:33,502 INFO L225 Difference]: With dead ends: 176 [2023-11-23 21:31:33,503 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 21:31:33,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:33,509 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:33,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 21:31:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-23 21:31:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2023-11-23 21:31:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2023-11-23 21:31:33,544 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 35 [2023-11-23 21:31:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:33,545 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2023-11-23 21:31:33,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:31:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2023-11-23 21:31:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:31:33,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:33,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:33,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:33,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1121641611, now seen corresponding path program 1 times [2023-11-23 21:31:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:33,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822228086] [2023-11-23 21:31:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:33,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822228086] [2023-11-23 21:31:33,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822228086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:33,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:33,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:31:33,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837259885] [2023-11-23 21:31:33,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:33,893 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:31:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:34,111 INFO L93 Difference]: Finished difference Result 272 states and 341 transitions. [2023-11-23 21:31:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-11-23 21:31:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:34,115 INFO L225 Difference]: With dead ends: 272 [2023-11-23 21:31:34,115 INFO L226 Difference]: Without dead ends: 180 [2023-11-23 21:31:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:31:34,117 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 73 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:34,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 277 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-23 21:31:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2023-11-23 21:31:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 123 states have internal predecessors, (137), 33 states have call successors, (33), 28 states have call predecessors, (33), 29 states have return successors, (45), 30 states have call predecessors, (45), 33 states have call successors, (45) [2023-11-23 21:31:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2023-11-23 21:31:34,146 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 37 [2023-11-23 21:31:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:34,147 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2023-11-23 21:31:34,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:31:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2023-11-23 21:31:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:31:34,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:34,149 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:34,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:34,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -650052777, now seen corresponding path program 1 times [2023-11-23 21:31:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:34,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728752376] [2023-11-23 21:31:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:31:34,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:34,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728752376] [2023-11-23 21:31:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728752376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:34,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:34,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:31:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126290733] [2023-11-23 21:31:34,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:34,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:34,481 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:31:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:34,878 INFO L93 Difference]: Finished difference Result 411 states and 519 transitions. [2023-11-23 21:31:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:31:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2023-11-23 21:31:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:34,882 INFO L225 Difference]: With dead ends: 411 [2023-11-23 21:31:34,882 INFO L226 Difference]: Without dead ends: 292 [2023-11-23 21:31:34,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:31:34,884 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 188 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:34,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 225 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-23 21:31:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 258. [2023-11-23 21:31:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 169 states have (on average 1.242603550295858) internal successors, (210), 186 states have internal predecessors, (210), 46 states have call successors, (46), 35 states have call predecessors, (46), 42 states have return successors, (65), 47 states have call predecessors, (65), 46 states have call successors, (65) [2023-11-23 21:31:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 321 transitions. [2023-11-23 21:31:34,925 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 321 transitions. Word has length 40 [2023-11-23 21:31:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:34,926 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 321 transitions. [2023-11-23 21:31:34,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:31:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 321 transitions. [2023-11-23 21:31:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:31:34,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:34,928 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:34,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:34,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash -911275196, now seen corresponding path program 1 times [2023-11-23 21:31:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596729097] [2023-11-23 21:31:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:31:35,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596729097] [2023-11-23 21:31:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596729097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:35,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224118395] [2023-11-23 21:31:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:35,069 INFO L87 Difference]: Start difference. First operand 258 states and 321 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:31:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:35,143 INFO L93 Difference]: Finished difference Result 514 states and 646 transitions. [2023-11-23 21:31:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:31:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2023-11-23 21:31:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:35,146 INFO L225 Difference]: With dead ends: 514 [2023-11-23 21:31:35,147 INFO L226 Difference]: Without dead ends: 258 [2023-11-23 21:31:35,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:35,149 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:35,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-23 21:31:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-11-23 21:31:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 169 states have (on average 1.21301775147929) internal successors, (205), 186 states have internal predecessors, (205), 46 states have call successors, (46), 35 states have call predecessors, (46), 42 states have return successors, (65), 47 states have call predecessors, (65), 46 states have call successors, (65) [2023-11-23 21:31:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 316 transitions. [2023-11-23 21:31:35,210 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 316 transitions. Word has length 57 [2023-11-23 21:31:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 316 transitions. [2023-11-23 21:31:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:31:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 316 transitions. [2023-11-23 21:31:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:31:35,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:35,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:35,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:35,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash -733914977, now seen corresponding path program 1 times [2023-11-23 21:31:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:35,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927320549] [2023-11-23 21:31:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:31:35,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927320549] [2023-11-23 21:31:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927320549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413818582] [2023-11-23 21:31:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:35,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:35,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:35,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:31:35,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:35,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413818582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:35,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:31:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-23 21:31:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112249453] [2023-11-23 21:31:35,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:35,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:35,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:35,570 INFO L87 Difference]: Start difference. First operand 258 states and 316 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:31:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:35,658 INFO L93 Difference]: Finished difference Result 385 states and 480 transitions. [2023-11-23 21:31:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 70 [2023-11-23 21:31:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:35,661 INFO L225 Difference]: With dead ends: 385 [2023-11-23 21:31:35,661 INFO L226 Difference]: Without dead ends: 248 [2023-11-23 21:31:35,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:35,663 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 35 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:35,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-23 21:31:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-23 21:31:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 178 states have internal predecessors, (191), 44 states have call successors, (44), 35 states have call predecessors, (44), 41 states have return successors, (55), 45 states have call predecessors, (55), 44 states have call successors, (55) [2023-11-23 21:31:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 290 transitions. [2023-11-23 21:31:35,705 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 290 transitions. Word has length 70 [2023-11-23 21:31:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:35,707 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 290 transitions. [2023-11-23 21:31:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:31:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 290 transitions. [2023-11-23 21:31:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:31:35,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:35,709 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:35,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:35,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:31:35,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:35,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 260458609, now seen corresponding path program 1 times [2023-11-23 21:31:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281246581] [2023-11-23 21:31:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 21:31:36,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281246581] [2023-11-23 21:31:36,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281246581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:36,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206185854] [2023-11-23 21:31:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:36,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:36,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:36,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:36,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:36,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:31:36,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:36,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:31:36,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206185854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968028621] [2023-11-23 21:31:36,595 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 21:31:36,595 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:36,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:36,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:36,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:47,027 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 144 for LOIs [2023-11-23 21:31:47,139 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 10 for LOIs [2023-11-23 21:31:47,416 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 33 for LOIs [2023-11-23 21:31:47,520 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 35 for LOIs [2023-11-23 21:31:47,591 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 1 for LOIs [2023-11-23 21:31:47,593 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2023-11-23 21:31:47,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:54,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5238#(and (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1| 0)) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |old(~pumpRunning~0)| 2147483647) (or (and (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1|) (= |old(~pumpRunning~0)| 0) (= |old(~waterLevel~0)| ~waterLevel~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| 2)) (not (= 0 ~systemActive~0))) (and (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1|) (= ~methaneLevelCritical~0 0) (= |timeShift_isMethaneAlarm_#res#1| 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| 2)) (= |timeShift_isMethaneLevelCritical_#res#1| 0))) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1| 2147483648)) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1| 2147483647) (= ~switchedOnBeforeTS~0 0))' at error location [2023-11-23 21:31:54,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:54,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:54,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-23 21:31:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609359425] [2023-11-23 21:31:54,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:54,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:31:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:31:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 21:31:54,285 INFO L87 Difference]: Start difference. First operand 248 states and 290 transitions. Second operand has 11 states, 8 states have (on average 9.625) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 21:31:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:55,412 INFO L93 Difference]: Finished difference Result 354 states and 416 transitions. [2023-11-23 21:31:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:31:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 9.625) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) Word has length 74 [2023-11-23 21:31:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:55,416 INFO L225 Difference]: With dead ends: 354 [2023-11-23 21:31:55,416 INFO L226 Difference]: Without dead ends: 352 [2023-11-23 21:31:55,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=294, Invalid=3488, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 21:31:55,420 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 161 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:55,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 701 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:31:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-23 21:31:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 308. [2023-11-23 21:31:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 199 states have (on average 1.170854271356784) internal successors, (233), 221 states have internal predecessors, (233), 56 states have call successors, (56), 46 states have call predecessors, (56), 52 states have return successors, (71), 55 states have call predecessors, (71), 56 states have call successors, (71) [2023-11-23 21:31:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 360 transitions. [2023-11-23 21:31:55,458 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 360 transitions. Word has length 74 [2023-11-23 21:31:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:55,459 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 360 transitions. [2023-11-23 21:31:55,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 9.625) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (21), 6 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-23 21:31:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 360 transitions. [2023-11-23 21:31:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 21:31:55,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:55,462 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:55,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:31:55,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1232825123, now seen corresponding path program 1 times [2023-11-23 21:31:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:55,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290071734] [2023-11-23 21:31:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 21:31:55,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290071734] [2023-11-23 21:31:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290071734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:55,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:55,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323635759] [2023-11-23 21:31:55,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:55,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:55,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:55,809 INFO L87 Difference]: Start difference. First operand 308 states and 360 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:31:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:56,048 INFO L93 Difference]: Finished difference Result 741 states and 876 transitions. [2023-11-23 21:31:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:31:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2023-11-23 21:31:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:56,054 INFO L225 Difference]: With dead ends: 741 [2023-11-23 21:31:56,055 INFO L226 Difference]: Without dead ends: 557 [2023-11-23 21:31:56,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:31:56,057 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 105 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:56,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 199 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-23 21:31:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 546. [2023-11-23 21:31:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 355 states have (on average 1.1549295774647887) internal successors, (410), 389 states have internal predecessors, (410), 97 states have call successors, (97), 83 states have call predecessors, (97), 93 states have return successors, (121), 98 states have call predecessors, (121), 97 states have call successors, (121) [2023-11-23 21:31:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 628 transitions. [2023-11-23 21:31:56,120 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 628 transitions. Word has length 93 [2023-11-23 21:31:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:56,120 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 628 transitions. [2023-11-23 21:31:56,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:31:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 628 transitions. [2023-11-23 21:31:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 21:31:56,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:56,125 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:56,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:31:56,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:56,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:56,126 INFO L85 PathProgramCache]: Analyzing trace with hash 82345929, now seen corresponding path program 1 times [2023-11-23 21:31:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:56,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879600421] [2023-11-23 21:31:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:56,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 21:31:56,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879600421] [2023-11-23 21:31:56,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879600421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680372697] [2023-11-23 21:31:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:56,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:56,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:56,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:56,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:56,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:31:56,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:31:56,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:31:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680372697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:57,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007722482] [2023-11-23 21:31:57,258 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 21:31:57,259 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:57,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:57,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:57,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:59,637 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 21 for LOIs [2023-11-23 21:31:59,644 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2023-11-23 21:32:00,026 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 33 for LOIs [2023-11-23 21:32:00,102 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 33 for LOIs [2023-11-23 21:32:00,158 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 45 for LOIs [2023-11-23 21:32:00,173 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 17 for LOIs [2023-11-23 21:32:00,177 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 39 for LOIs [2023-11-23 21:32:00,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:32:04,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8562#(and (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1| 0)) (<= ~methaneLevelCritical~0 1) (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (<= ~pumpRunning~0 1) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~0#1|) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (<= |old(~pumpRunning~0)| 2147483647) (<= 0 ~methaneLevelCritical~0) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (<= 0 ~pumpRunning~0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| 2)) (= ~switchedOnBeforeTS~0 0) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp~0#1| 2147483648)))' at error location [2023-11-23 21:32:04,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:32:04,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:32:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2023-11-23 21:32:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215676466] [2023-11-23 21:32:04,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:32:04,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:32:04,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:04,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:32:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2868, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 21:32:04,042 INFO L87 Difference]: Start difference. First operand 546 states and 628 transitions. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (24), 5 states have call predecessors, (24), 8 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-11-23 21:32:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:06,192 INFO L93 Difference]: Finished difference Result 1596 states and 1997 transitions. [2023-11-23 21:32:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 21:32:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (24), 5 states have call predecessors, (24), 8 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 96 [2023-11-23 21:32:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:06,209 INFO L225 Difference]: With dead ends: 1596 [2023-11-23 21:32:06,209 INFO L226 Difference]: Without dead ends: 1060 [2023-11-23 21:32:06,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=739, Invalid=6571, Unknown=0, NotChecked=0, Total=7310 [2023-11-23 21:32:06,223 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 430 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:06,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 455 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:32:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-11-23 21:32:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 652. [2023-11-23 21:32:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 425 states have (on average 1.1247058823529412) internal successors, (478), 460 states have internal predecessors, (478), 107 states have call successors, (107), 101 states have call predecessors, (107), 119 states have return successors, (142), 119 states have call predecessors, (142), 107 states have call successors, (142) [2023-11-23 21:32:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 727 transitions. [2023-11-23 21:32:06,379 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 727 transitions. Word has length 96 [2023-11-23 21:32:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:06,380 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 727 transitions. [2023-11-23 21:32:06,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 9 states have call successors, (24), 5 states have call predecessors, (24), 8 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-11-23 21:32:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 727 transitions. [2023-11-23 21:32:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 21:32:06,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:06,385 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:32:06,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:32:06,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:32:06,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:06,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1524068566, now seen corresponding path program 1 times [2023-11-23 21:32:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100626630] [2023-11-23 21:32:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:32:07,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100626630] [2023-11-23 21:32:07,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100626630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:32:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800532381] [2023-11-23 21:32:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:07,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:32:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:32:07,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:32:07,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fca56a0-da1c-4f54-a949-4520e749a236/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:32:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:08,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 21:32:08,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:32:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:32:08,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:32:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:32:09,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800532381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:32:09,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085164668] [2023-11-23 21:32:09,766 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 21:32:09,766 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:32:09,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:32:09,767 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:32:09,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:32:12,947 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 142 for LOIs [2023-11-23 21:32:13,039 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2023-11-23 21:32:13,381 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 33 for LOIs [2023-11-23 21:32:13,451 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 33 for LOIs [2023-11-23 21:32:13,530 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 45 for LOIs [2023-11-23 21:32:13,541 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 3 for LOIs [2023-11-23 21:32:13,543 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 39 for LOIs [2023-11-23 21:32:13,552 INFO L180 IcfgInterpreter]: Interpretation finished