./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/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_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/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_9cb77b12-5186-46a0-a5e5-04676a441742/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 d8e8f57de68bd156f96d4553940231369dc2e0f8c550ee7a61d6446a6f476745 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:23,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:23,762 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:23,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:23,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:23,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:23,797 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:23,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:23,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:23,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:23,799 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:23,800 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:23,800 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:23,801 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:23,801 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:23,802 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:23,803 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:23,807 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:23,808 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:23,808 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:23,808 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:23,809 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:23,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:23,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:23,811 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:23,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:23,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:23,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:23,812 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:23,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:23,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:23,813 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:23,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:23,814 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:23,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:23,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:23,815 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:23,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:23,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:23,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:23,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:23,818 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:23,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:23,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:23,819 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:23,819 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:23,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:23,820 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_9cb77b12-5186-46a0-a5e5-04676a441742/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8e8f57de68bd156f96d4553940231369dc2e0f8c550ee7a61d6446a6f476745 [2023-11-23 20:36:24,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:24,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:24,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:24,095 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:24,095 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:24,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c [2023-11-23 20:36:27,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:27,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:27,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c [2023-11-23 20:36:27,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/data/2130efa31/138525e6a3064ce3a293933f8e0ea625/FLAGd06abf70f [2023-11-23 20:36:27,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/data/2130efa31/138525e6a3064ce3a293933f8e0ea625 [2023-11-23 20:36:27,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:27,620 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:27,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:27,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:27,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:27,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:27" (1/1) ... [2023-11-23 20:36:27,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e6ff38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:27, skipping insertion in model container [2023-11-23 20:36:27,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:27" (1/1) ... [2023-11-23 20:36:27,688 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:27,967 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_9cb77b12-5186-46a0-a5e5-04676a441742/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c[12672,12685] [2023-11-23 20:36:28,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:28,022 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:28,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-23 20:36:28,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [415] [2023-11-23 20:36:28,041 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [521] [2023-11-23 20:36:28,041 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [530] [2023-11-23 20:36:28,041 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [571] [2023-11-23 20:36:28,041 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [679] [2023-11-23 20:36:28,042 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [714] [2023-11-23 20:36:28,042 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [782] [2023-11-23 20:36:28,114 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_9cb77b12-5186-46a0-a5e5-04676a441742/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c[12672,12685] [2023-11-23 20:36:28,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:28,163 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:28,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28 WrapperNode [2023-11-23 20:36:28,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:28,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:28,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:28,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:28,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,263 INFO L138 Inliner]: procedures = 59, calls = 106, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 226 [2023-11-23 20:36:28,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:28,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:28,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:28,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:28,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:28,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:28,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:28,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:28,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:28,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:28,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:28,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:28,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:28,413 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 20:36:28,413 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 20:36:28,413 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-23 20:36:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-23 20:36:28,414 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:36:28,414 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:36:28,414 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:36:28,415 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:36:28,415 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:36:28,415 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:36:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 20:36:28,416 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 20:36:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 20:36:28,418 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 20:36:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-23 20:36:28,418 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-23 20:36:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 20:36:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 20:36:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 20:36:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 20:36:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:28,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:28,556 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:28,562 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:28,949 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:29,138 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:29,139 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:36:29,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:29 BoogieIcfgContainer [2023-11-23 20:36:29,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:29,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:29,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:29,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:29,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:27" (1/3) ... [2023-11-23 20:36:29,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ec0352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:29, skipping insertion in model container [2023-11-23 20:36:29,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28" (2/3) ... [2023-11-23 20:36:29,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ec0352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:29, skipping insertion in model container [2023-11-23 20:36:29,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:29" (3/3) ... [2023-11-23 20:36:29,155 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product62.cil.c [2023-11-23 20:36:29,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:29,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:29,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:29,266 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;@19f22cce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:29,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 20:36:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:36:29,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:29,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:29,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:29,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash -172945682, now seen corresponding path program 1 times [2023-11-23 20:36:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:29,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269229473] [2023-11-23 20:36:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:29,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:29,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269229473] [2023-11-23 20:36:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269229473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:29,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:29,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024934262] [2023-11-23 20:36:29,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:36:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:36:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:29,536 INFO L87 Difference]: Start difference. First operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:29,658 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2023-11-23 20:36:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:36:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-23 20:36:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:29,674 INFO L225 Difference]: With dead ends: 148 [2023-11-23 20:36:29,674 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 20:36:29,679 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 20:36:29,684 INFO L413 NwaCegarLoop]: 78 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, 78 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 20:36:29,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 20:36:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-23 20:36:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 51 states have internal predecessors, (55), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 20:36:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-11-23 20:36:29,766 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 17 [2023-11-23 20:36:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:29,767 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-11-23 20:36:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-11-23 20:36:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:36:29,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:29,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:29,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:29,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:29,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 626930368, now seen corresponding path program 1 times [2023-11-23 20:36:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907085977] [2023-11-23 20:36:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:29,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907085977] [2023-11-23 20:36:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907085977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:29,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:29,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169345748] [2023-11-23 20:36:29,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:29,955 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:30,026 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-11-23 20:36:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-23 20:36:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:30,031 INFO L225 Difference]: With dead ends: 117 [2023-11-23 20:36:30,031 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 20:36:30,033 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 20:36:30,034 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 119 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 20:36:30,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 119 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 20:36:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-23 20:36:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 46 states have internal predecessors, (49), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 20:36:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-23 20:36:30,060 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 18 [2023-11-23 20:36:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-23 20:36:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-23 20:36:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:36:30,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:30,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:30,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:30,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash -977085177, now seen corresponding path program 1 times [2023-11-23 20:36:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:30,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700775821] [2023-11-23 20:36:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:30,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:30,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:30,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700775821] [2023-11-23 20:36:30,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700775821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:30,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:30,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556299030] [2023-11-23 20:36:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:30,365 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:30,547 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2023-11-23 20:36:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-23 20:36:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:30,552 INFO L225 Difference]: With dead ends: 122 [2023-11-23 20:36:30,552 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 20:36:30,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 20:36:30,561 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 74 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:30,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 85 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 20:36:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-23 20:36:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 20:36:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2023-11-23 20:36:30,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 20 [2023-11-23 20:36:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2023-11-23 20:36:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:36:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2023-11-23 20:36:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:36:30,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:30,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:36:30,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:30,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1662869231, now seen corresponding path program 1 times [2023-11-23 20:36:30,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:30,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701906808] [2023-11-23 20:36:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:30,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:30,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701906808] [2023-11-23 20:36:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701906808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:30,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:30,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636625039] [2023-11-23 20:36:30,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:30,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:30,790 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:36:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:31,052 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2023-11-23 20:36:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:36:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-23 20:36:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:31,058 INFO L225 Difference]: With dead ends: 195 [2023-11-23 20:36:31,058 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 20:36:31,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:31,072 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 134 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:31,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 180 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 20:36:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2023-11-23 20:36:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 91 states have internal predecessors, (103), 22 states have call successors, (22), 18 states have call predecessors, (22), 23 states have return successors, (29), 24 states have call predecessors, (29), 22 states have call successors, (29) [2023-11-23 20:36:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-11-23 20:36:31,098 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 31 [2023-11-23 20:36:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:31,098 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-11-23 20:36:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:36:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-11-23 20:36:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 20:36:31,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:31,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:36:31,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:31,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -973669046, now seen corresponding path program 1 times [2023-11-23 20:36:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:31,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344302764] [2023-11-23 20:36:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:31,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:31,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344302764] [2023-11-23 20:36:31,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344302764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:31,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:31,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136411787] [2023-11-23 20:36:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:31,204 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:31,291 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2023-11-23 20:36:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-23 20:36:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:31,299 INFO L225 Difference]: With dead ends: 256 [2023-11-23 20:36:31,299 INFO L226 Difference]: Without dead ends: 254 [2023-11-23 20:36:31,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:31,301 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:31,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:36:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-23 20:36:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2023-11-23 20:36:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 163 states have (on average 1.2208588957055215) internal successors, (199), 178 states have internal predecessors, (199), 44 states have call successors, (44), 36 states have call predecessors, (44), 46 states have return successors, (70), 48 states have call predecessors, (70), 44 states have call successors, (70) [2023-11-23 20:36:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 313 transitions. [2023-11-23 20:36:31,383 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 313 transitions. Word has length 36 [2023-11-23 20:36:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:31,384 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 313 transitions. [2023-11-23 20:36:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:36:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 313 transitions. [2023-11-23 20:36:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 20:36:31,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:31,393 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:36:31,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:31,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash 239350709, now seen corresponding path program 1 times [2023-11-23 20:36:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:31,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596662181] [2023-11-23 20:36:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:31,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:31,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596662181] [2023-11-23 20:36:31,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596662181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:31,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849053734] [2023-11-23 20:36:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:31,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:31,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:32,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 20:36:32,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:36:32,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:32,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849053734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:32,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:32,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2023-11-23 20:36:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858556538] [2023-11-23 20:36:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:36:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:36:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:36:32,405 INFO L87 Difference]: Start difference. First operand 254 states and 313 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-23 20:36:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:32,948 INFO L93 Difference]: Finished difference Result 592 states and 747 transitions. [2023-11-23 20:36:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:36:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 6 states have call successors, (10) Word has length 76 [2023-11-23 20:36:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:32,956 INFO L225 Difference]: With dead ends: 592 [2023-11-23 20:36:32,956 INFO L226 Difference]: Without dead ends: 340 [2023-11-23 20:36:32,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:36:32,960 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 136 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:32,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 185 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-23 20:36:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 302. [2023-11-23 20:36:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 197 states have (on average 1.2030456852791878) internal successors, (237), 212 states have internal predecessors, (237), 52 states have call successors, (52), 48 states have call predecessors, (52), 52 states have return successors, (80), 52 states have call predecessors, (80), 52 states have call successors, (80) [2023-11-23 20:36:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 369 transitions. [2023-11-23 20:36:33,028 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 369 transitions. Word has length 76 [2023-11-23 20:36:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:33,030 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 369 transitions. [2023-11-23 20:36:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-23 20:36:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 369 transitions. [2023-11-23 20:36:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 20:36:33,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:33,033 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, 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] [2023-11-23 20:36:33,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:36:33,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:33,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1266018147, now seen corresponding path program 1 times [2023-11-23 20:36:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160834463] [2023-11-23 20:36:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:33,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160834463] [2023-11-23 20:36:33,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160834463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136227999] [2023-11-23 20:36:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:33,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:33,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:34,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:36:34,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:36:34,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:36:35,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136227999] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:35,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:35,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 26 [2023-11-23 20:36:35,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110949087] [2023-11-23 20:36:35,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:35,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 20:36:35,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 20:36:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-11-23 20:36:35,034 INFO L87 Difference]: Start difference. First operand 302 states and 369 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-23 20:36:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:35,901 INFO L93 Difference]: Finished difference Result 927 states and 1173 transitions. [2023-11-23 20:36:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 20:36:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 79 [2023-11-23 20:36:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:35,908 INFO L225 Difference]: With dead ends: 927 [2023-11-23 20:36:35,909 INFO L226 Difference]: Without dead ends: 627 [2023-11-23 20:36:35,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 20:36:35,912 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 532 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:35,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 224 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:36:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-11-23 20:36:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 565. [2023-11-23 20:36:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 370 states have (on average 1.2108108108108109) internal successors, (448), 394 states have internal predecessors, (448), 98 states have call successors, (98), 90 states have call predecessors, (98), 96 states have return successors, (150), 100 states have call predecessors, (150), 98 states have call successors, (150) [2023-11-23 20:36:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 696 transitions. [2023-11-23 20:36:36,030 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 696 transitions. Word has length 79 [2023-11-23 20:36:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:36,031 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 696 transitions. [2023-11-23 20:36:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-23 20:36:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 696 transitions. [2023-11-23 20:36:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 20:36:36,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:36,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:36,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:36:36,254 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:36,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1281089705, now seen corresponding path program 1 times [2023-11-23 20:36:36,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:36,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26822343] [2023-11-23 20:36:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:36,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:36:36,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26822343] [2023-11-23 20:36:36,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26822343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145946535] [2023-11-23 20:36:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:36,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:36,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:36,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:36,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:36:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:36,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:36:36,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:36:36,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145946535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:36,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:36,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-23 20:36:36,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443807086] [2023-11-23 20:36:36,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:36,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:36,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:36,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:36:36,570 INFO L87 Difference]: Start difference. First operand 565 states and 696 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:36,733 INFO L93 Difference]: Finished difference Result 1068 states and 1313 transitions. [2023-11-23 20:36:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:36,734 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2023-11-23 20:36:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:36,738 INFO L225 Difference]: With dead ends: 1068 [2023-11-23 20:36:36,738 INFO L226 Difference]: Without dead ends: 508 [2023-11-23 20:36:36,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:36:36,740 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 41 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-23 20:36:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 477. [2023-11-23 20:36:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 306 states have (on average 1.196078431372549) internal successors, (366), 329 states have internal predecessors, (366), 85 states have call successors, (85), 77 states have call predecessors, (85), 85 states have return successors, (122), 86 states have call predecessors, (122), 85 states have call successors, (122) [2023-11-23 20:36:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 573 transitions. [2023-11-23 20:36:36,823 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 573 transitions. Word has length 71 [2023-11-23 20:36:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 573 transitions. [2023-11-23 20:36:36,824 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 573 transitions. [2023-11-23 20:36:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 20:36:36,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:36,827 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:36,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:37,041 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:37,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1992751923, now seen corresponding path program 1 times [2023-11-23 20:36:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777438871] [2023-11-23 20:36:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:37,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 20:36:37,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777438871] [2023-11-23 20:36:37,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777438871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:37,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338246936] [2023-11-23 20:36:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:37,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:37,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:36:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:37,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:36:37,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 20:36:37,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:36:37,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338246936] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:37,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:36:37,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 5] total 14 [2023-11-23 20:36:37,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944724273] [2023-11-23 20:36:37,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:37,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:36:37,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:37,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:36:37,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:36:37,795 INFO L87 Difference]: Start difference. First operand 477 states and 573 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:38,081 INFO L93 Difference]: Finished difference Result 1221 states and 1475 transitions. [2023-11-23 20:36:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:36:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 84 [2023-11-23 20:36:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:38,088 INFO L225 Difference]: With dead ends: 1221 [2023-11-23 20:36:38,088 INFO L226 Difference]: Without dead ends: 749 [2023-11-23 20:36:38,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:36:38,092 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 51 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 271 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-11-23 20:36:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 724. [2023-11-23 20:36:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 468 states have (on average 1.1730769230769231) internal successors, (549), 497 states have internal predecessors, (549), 128 states have call successors, (128), 116 states have call predecessors, (128), 127 states have return successors, (177), 130 states have call predecessors, (177), 128 states have call successors, (177) [2023-11-23 20:36:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 854 transitions. [2023-11-23 20:36:38,222 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 854 transitions. Word has length 84 [2023-11-23 20:36:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:38,222 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 854 transitions. [2023-11-23 20:36:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 854 transitions. [2023-11-23 20:36:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 20:36:38,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,228 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:38,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 20:36:38,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:38,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1363316311, now seen corresponding path program 1 times [2023-11-23 20:36:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:38,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592812194] [2023-11-23 20:36:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 20:36:38,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:38,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592812194] [2023-11-23 20:36:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592812194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:38,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:38,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113602089] [2023-11-23 20:36:38,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:38,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:38,614 INFO L87 Difference]: Start difference. First operand 724 states and 854 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:36:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:38,810 INFO L93 Difference]: Finished difference Result 1408 states and 1672 transitions. [2023-11-23 20:36:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2023-11-23 20:36:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:38,817 INFO L225 Difference]: With dead ends: 1408 [2023-11-23 20:36:38,817 INFO L226 Difference]: Without dead ends: 689 [2023-11-23 20:36:38,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 20:36:38,821 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 46 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:38,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 171 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-23 20:36:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 668. [2023-11-23 20:36:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 433 states have (on average 1.1593533487297922) internal successors, (502), 461 states have internal predecessors, (502), 119 states have call successors, (119), 107 states have call predecessors, (119), 115 states have return successors, (157), 118 states have call predecessors, (157), 119 states have call successors, (157) [2023-11-23 20:36:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 778 transitions. [2023-11-23 20:36:38,938 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 778 transitions. Word has length 87 [2023-11-23 20:36:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:38,939 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 778 transitions. [2023-11-23 20:36:38,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:36:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 778 transitions. [2023-11-23 20:36:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 20:36:38,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,944 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:36:38,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:38,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1130068013, now seen corresponding path program 1 times [2023-11-23 20:36:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455111258] [2023-11-23 20:36:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 20:36:39,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455111258] [2023-11-23 20:36:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455111258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902865884] [2023-11-23 20:36:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:39,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:39,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:39,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:36:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:39,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:36:39,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:36:39,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:36:40,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902865884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:40,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304337816] [2023-11-23 20:36:40,544 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-23 20:36:40,545 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:40,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:40,553 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:40,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:43,411 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 27 for LOIs [2023-11-23 20:36:43,419 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2023-11-23 20:36:43,981 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 59 for LOIs [2023-11-23 20:36:44,476 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 57 for LOIs [2023-11-23 20:36:45,018 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 40 for LOIs [2023-11-23 20:36:45,169 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 6 for LOIs [2023-11-23 20:36:45,170 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 23 for LOIs [2023-11-23 20:36:45,175 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 48 for LOIs [2023-11-23 20:36:45,195 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:52,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14957#(and (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| 0)) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~0#1|) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (<= 0 ~methAndRunningLastTime~0) (<= 0 |old(~methAndRunningLastTime~0)|) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| ~methaneLevelCritical~0) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp___0~0#1| 0)) (not (= ~methAndRunningLastTime~0 0)))' at error location [2023-11-23 20:36:52,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:52,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:52,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 31 [2023-11-23 20:36:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055581263] [2023-11-23 20:36:52,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 20:36:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 20:36:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5250, Unknown=0, NotChecked=0, Total=5700 [2023-11-23 20:36:52,030 INFO L87 Difference]: Start difference. First operand 668 states and 778 transitions. Second operand has 31 states, 26 states have (on average 4.769230769230769) internal successors, (124), 25 states have internal predecessors, (124), 11 states have call successors, (35), 11 states have call predecessors, (35), 13 states have return successors, (33), 13 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-23 20:37:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:01,493 INFO L93 Difference]: Finished difference Result 2649 states and 3314 transitions. [2023-11-23 20:37:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-11-23 20:37:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 4.769230769230769) internal successors, (124), 25 states have internal predecessors, (124), 11 states have call successors, (35), 11 states have call predecessors, (35), 13 states have return successors, (33), 13 states have call predecessors, (33), 11 states have call successors, (33) Word has length 91 [2023-11-23 20:37:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:01,507 INFO L225 Difference]: With dead ends: 2649 [2023-11-23 20:37:01,507 INFO L226 Difference]: Without dead ends: 1986 [2023-11-23 20:37:01,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19484 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=3951, Invalid=49641, Unknown=0, NotChecked=0, Total=53592 [2023-11-23 20:37:01,533 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 714 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 5377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:01,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1724 Invalid, 5377 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-23 20:37:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2023-11-23 20:37:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1724. [2023-11-23 20:37:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1145 states have (on average 1.1510917030567687) internal successors, (1318), 1203 states have internal predecessors, (1318), 308 states have call successors, (308), 269 states have call predecessors, (308), 270 states have return successors, (472), 286 states have call predecessors, (472), 308 states have call successors, (472) [2023-11-23 20:37:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2098 transitions. [2023-11-23 20:37:01,769 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2098 transitions. Word has length 91 [2023-11-23 20:37:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:01,770 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2098 transitions. [2023-11-23 20:37:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 4.769230769230769) internal successors, (124), 25 states have internal predecessors, (124), 11 states have call successors, (35), 11 states have call predecessors, (35), 13 states have return successors, (33), 13 states have call predecessors, (33), 11 states have call successors, (33) [2023-11-23 20:37:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2098 transitions. [2023-11-23 20:37:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 20:37:01,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:01,777 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-23 20:37:01,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 20:37:01,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:01,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1934154007, now seen corresponding path program 1 times [2023-11-23 20:37:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049823961] [2023-11-23 20:37:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 20:37:02,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049823961] [2023-11-23 20:37:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049823961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:02,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121451304] [2023-11-23 20:37:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:02,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:02,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:02,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cb77b12-5186-46a0-a5e5-04676a441742/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:02,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 20:37:02,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-23 20:37:03,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 79 proven. 27 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-23 20:37:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121451304] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:04,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111206856] [2023-11-23 20:37:04,112 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2023-11-23 20:37:04,112 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:04,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:04,113 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:04,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:07,537 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 144 for LOIs [2023-11-23 20:37:07,657 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 34 for LOIs [2023-11-23 20:37:08,246 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 6 for LOIs [2023-11-23 20:37:08,294 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 19 for LOIs [2023-11-23 20:37:08,421 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 38 for LOIs [2023-11-23 20:37:08,578 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 6 for LOIs [2023-11-23 20:37:08,580 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 18 for LOIs [2023-11-23 20:37:08,585 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 11 for LOIs [2023-11-23 20:37:08,587 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 55 for LOIs [2023-11-23 20:37:08,634 INFO L180 IcfgInterpreter]: Interpretation finished