./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/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_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/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_513e04fa-21d2-4b3c-ae99-52e03892c55f/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 a5340faf3ec1f0e0bc66d280fc3b45c510e704ff1d108d74101ee8606e665888 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:39:36,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:39:36,508 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:39:36,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:39:36,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:39:36,547 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:39:36,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:39:36,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:39:36,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:39:36,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:39:36,551 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:39:36,552 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:39:36,552 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:39:36,553 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:39:36,554 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:39:36,554 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:39:36,555 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:39:36,556 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:39:36,556 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:39:36,557 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:39:36,558 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:39:36,559 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:39:36,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:39:36,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:39:36,561 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:39:36,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:39:36,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:39:36,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:39:36,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:39:36,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:39:36,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:39:36,564 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:39:36,565 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:39:36,565 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:39:36,566 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:39:36,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:39:36,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:39:36,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:36,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:39:36,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:39:36,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:39:36,569 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:39:36,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:39:36,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:39:36,569 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:39:36,569 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:39:36,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:39:36,570 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_513e04fa-21d2-4b3c-ae99-52e03892c55f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5340faf3ec1f0e0bc66d280fc3b45c510e704ff1d108d74101ee8606e665888 [2023-11-23 20:39:36,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:39:36,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:39:36,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:39:36,840 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:39:36,841 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:39:36,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c [2023-11-23 20:39:40,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:39:40,340 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:39:40,341 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c [2023-11-23 20:39:40,360 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/data/2048a221a/cc6230b5daa44eb5a02984a6cc099ff5/FLAG95646289c [2023-11-23 20:39:40,373 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/data/2048a221a/cc6230b5daa44eb5a02984a6cc099ff5 [2023-11-23 20:39:40,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:39:40,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:39:40,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:39:40,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:39:40,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c94e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40, skipping insertion in model container [2023-11-23 20:39:40,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,441 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:39:40,599 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_513e04fa-21d2-4b3c-ae99-52e03892c55f/sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c[1605,1618] [2023-11-23 20:39:40,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,791 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:39:40,802 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [49] [2023-11-23 20:39:40,803 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [58] [2023-11-23 20:39:40,804 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [96] [2023-11-23 20:39:40,804 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [347] [2023-11-23 20:39:40,804 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [415] [2023-11-23 20:39:40,804 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [519] [2023-11-23 20:39:40,805 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [545] [2023-11-23 20:39:40,805 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [911] [2023-11-23 20:39:40,815 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_513e04fa-21d2-4b3c-ae99-52e03892c55f/sv-benchmarks/c/product-lines/minepump_spec4_product61.cil.c[1605,1618] [2023-11-23 20:39:40,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,949 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:39:40,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40 WrapperNode [2023-11-23 20:39:40,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:40,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:39:40,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:39:40,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,016 INFO L138 Inliner]: procedures = 57, calls = 104, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 236 [2023-11-23 20:39:41,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:41,018 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:39:41,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:39:41,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:39:41,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,039 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:39:41,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:39:41,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:39:41,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:39:41,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:41,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:39:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:39:41,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:39:41,162 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 20:39:41,162 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 20:39:41,162 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:39:41,162 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:39:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:39:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:39:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:39:41,163 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:39:41,163 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 20:39:41,164 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 20:39:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 20:39:41,164 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 20:39:41,164 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-23 20:39:41,165 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-23 20:39:41,165 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 20:39:41,165 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 20:39:41,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:39:41,165 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 20:39:41,166 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 20:39:41,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:39:41,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:39:41,293 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:39:41,296 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:39:41,617 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:39:41,812 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:39:41,812 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:39:41,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41 BoogieIcfgContainer [2023-11-23 20:39:41,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:39:41,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:39:41,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:39:41,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:39:41,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:40" (1/3) ... [2023-11-23 20:39:41,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74576343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (2/3) ... [2023-11-23 20:39:41,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74576343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41" (3/3) ... [2023-11-23 20:39:41,824 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product61.cil.c [2023-11-23 20:39:41,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:39:41,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:39:41,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:39:41,916 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;@4e25c55a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:39:41,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:39:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 51 states have internal predecessors, (58), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 20:39:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:39:41,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:41,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:41,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:41,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash 17510509, now seen corresponding path program 1 times [2023-11-23 20:39:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:41,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336341] [2023-11-23 20:39:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,257 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 20:39:42,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336341] [2023-11-23 20:39:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:42,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:39:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978422746] [2023-11-23 20:39:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:39:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:39:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:39:42,320 INFO L87 Difference]: Start difference. First operand has 68 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 51 states have internal predecessors, (58), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,448 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2023-11-23 20:39:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:39:42,453 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 20:39:42,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,466 INFO L225 Difference]: With dead ends: 134 [2023-11-23 20:39:42,466 INFO L226 Difference]: Without dead ends: 63 [2023-11-23 20:39:42,472 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 20:39:42,478 INFO L413 NwaCegarLoop]: 69 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, 69 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 20:39:42,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-23 20:39:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-23 20:39:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 47 states have internal predecessors, (50), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 20:39:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-11-23 20:39:42,529 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 12 [2023-11-23 20:39:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,530 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-11-23 20:39:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-11-23 20:39:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:39:42,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:39:42,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:42,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -158948085, now seen corresponding path program 1 times [2023-11-23 20:39:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285571876] [2023-11-23 20:39:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,640 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 20:39:42,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285571876] [2023-11-23 20:39:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285571876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:42,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:42,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221521577] [2023-11-23 20:39:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:39:42,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:39:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:39:42,648 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,699 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2023-11-23 20:39:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:39:42,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 20:39:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,701 INFO L225 Difference]: With dead ends: 103 [2023-11-23 20:39:42,702 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 20:39:42,703 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 20:39:42,704 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:42,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:39:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 20:39:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-23 20:39:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 42 states have internal predecessors, (44), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 20:39:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-23 20:39:42,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 13 [2023-11-23 20:39:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,717 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-23 20:39:42,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-23 20:39:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:39:42,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:39:42,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash 939220229, now seen corresponding path program 1 times [2023-11-23 20:39:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109261336] [2023-11-23 20:39:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,851 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 20:39:42,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109261336] [2023-11-23 20:39:42,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109261336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:42,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:39:42,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202673613] [2023-11-23 20:39:42,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:39:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:39:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:39:42,855 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,929 INFO L93 Difference]: Finished difference Result 108 states and 139 transitions. [2023-11-23 20:39:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:39:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 20:39:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,933 INFO L225 Difference]: With dead ends: 108 [2023-11-23 20:39:42,933 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 20:39:42,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 20:39:42,935 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:42,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 20:39:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-23 20:39:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 42 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 20:39:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-11-23 20:39:42,960 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 15 [2023-11-23 20:39:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,961 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-11-23 20:39:42,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-11-23 20:39:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:39:42,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,964 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] [2023-11-23 20:39:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:39:42,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:42,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1590000299, now seen corresponding path program 1 times [2023-11-23 20:39:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:42,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336891668] [2023-11-23 20:39:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,063 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 20:39:43,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336891668] [2023-11-23 20:39:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336891668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:43,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:39:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12989384] [2023-11-23 20:39:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:39:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:39:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:39:43,067 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:39:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:43,139 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2023-11-23 20:39:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:39:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 20:39:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:43,141 INFO L225 Difference]: With dead ends: 144 [2023-11-23 20:39:43,141 INFO L226 Difference]: Without dead ends: 91 [2023-11-23 20:39:43,142 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 20:39:43,144 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:43,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:39:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-23 20:39:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-11-23 20:39:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 65 states have internal predecessors, (71), 16 states have call successors, (16), 15 states have call predecessors, (16), 15 states have return successors, (22), 14 states have call predecessors, (22), 16 states have call successors, (22) [2023-11-23 20:39:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2023-11-23 20:39:43,163 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 25 [2023-11-23 20:39:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:43,163 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2023-11-23 20:39:43,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:39:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2023-11-23 20:39:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:39:43,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:43,165 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 20:39:43,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:39:43,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:43,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash 414278632, now seen corresponding path program 1 times [2023-11-23 20:39:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653766618] [2023-11-23 20:39:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,438 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 20:39:43,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653766618] [2023-11-23 20:39:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653766618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:43,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:43,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:39:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356790685] [2023-11-23 20:39:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:39:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:39:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:43,443 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:39:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:43,731 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-11-23 20:39:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:39:43,733 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-23 20:39:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:43,738 INFO L225 Difference]: With dead ends: 115 [2023-11-23 20:39:43,738 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 20:39:43,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:39:43,746 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:43,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 128 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:39:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 20:39:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2023-11-23 20:39:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 78 states have internal predecessors, (86), 16 states have call successors, (16), 15 states have call predecessors, (16), 20 states have return successors, (27), 18 states have call predecessors, (27), 16 states have call successors, (27) [2023-11-23 20:39:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-11-23 20:39:43,788 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 31 [2023-11-23 20:39:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:43,789 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-11-23 20:39:43,789 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:39:43,789 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-11-23 20:39:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:39:43,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:43,797 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] [2023-11-23 20:39:43,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:39:43,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:43,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash -855662436, now seen corresponding path program 1 times [2023-11-23 20:39:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108000895] [2023-11-23 20:39:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,079 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 20:39:44,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:44,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108000895] [2023-11-23 20:39:44,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108000895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:44,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:44,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:39:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504876868] [2023-11-23 20:39:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:44,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:39:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:39:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:39:44,082 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:39:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:44,277 INFO L93 Difference]: Finished difference Result 271 states and 331 transitions. [2023-11-23 20:39:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:39:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-11-23 20:39:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:44,280 INFO L225 Difference]: With dead ends: 271 [2023-11-23 20:39:44,280 INFO L226 Difference]: Without dead ends: 166 [2023-11-23 20:39:44,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:39:44,282 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 78 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:44,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 211 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-23 20:39:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 140. [2023-11-23 20:39:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.2043010752688172) internal successors, (112), 102 states have internal predecessors, (112), 21 states have call successors, (21), 20 states have call predecessors, (21), 25 states have return successors, (32), 23 states have call predecessors, (32), 21 states have call successors, (32) [2023-11-23 20:39:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2023-11-23 20:39:44,318 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 32 [2023-11-23 20:39:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:44,318 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2023-11-23 20:39:44,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:39:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2023-11-23 20:39:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:39:44,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:44,320 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] [2023-11-23 20:39:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:39:44,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:44,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1406463280, now seen corresponding path program 1 times [2023-11-23 20:39:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498400745] [2023-11-23 20:39:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:44,570 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 20:39:44,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498400745] [2023-11-23 20:39:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498400745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:44,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:39:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486467888] [2023-11-23 20:39:44,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:44,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:39:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:39:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:39:44,573 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 20:39:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:44,998 INFO L93 Difference]: Finished difference Result 344 states and 415 transitions. [2023-11-23 20:39:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:39:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-23 20:39:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:45,002 INFO L225 Difference]: With dead ends: 344 [2023-11-23 20:39:45,002 INFO L226 Difference]: Without dead ends: 239 [2023-11-23 20:39:45,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:39:45,008 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:45,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 201 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:39:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-23 20:39:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 222. [2023-11-23 20:39:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 163 states have internal predecessors, (176), 35 states have call successors, (35), 30 states have call predecessors, (35), 39 states have return successors, (54), 38 states have call predecessors, (54), 35 states have call successors, (54) [2023-11-23 20:39:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 265 transitions. [2023-11-23 20:39:45,061 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 265 transitions. Word has length 35 [2023-11-23 20:39:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:45,063 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 265 transitions. [2023-11-23 20:39:45,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 20:39:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 265 transitions. [2023-11-23 20:39:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 20:39:45,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:45,073 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, 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 20:39:45,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:39:45,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:45,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 281292003, now seen corresponding path program 1 times [2023-11-23 20:39:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:45,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498589428] [2023-11-23 20:39:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:39:45,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498589428] [2023-11-23 20:39:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498589428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222893408] [2023-11-23 20:39:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:45,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:45,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:45,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:39:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:45,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:39:45,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:39:46,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 20:39:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222893408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741460575] [2023-11-23 20:39:46,830 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-23 20:39:46,831 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:46,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:46,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:46,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:50,099 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 22 for LOIs [2023-11-23 20:39:50,106 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2023-11-23 20:39:50,466 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 1 for LOIs [2023-11-23 20:39:50,492 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 6 for LOIs [2023-11-23 20:39:50,599 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 29 for LOIs [2023-11-23 20:39:50,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1741460575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:53,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:53,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [11, 12, 10] total 56 [2023-11-23 20:39:53,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960211441] [2023-11-23 20:39:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 20:39:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 20:39:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2719, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 20:39:53,335 INFO L87 Difference]: Start difference. First operand 222 states and 265 transitions. Second operand has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:40:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:05,435 INFO L93 Difference]: Finished difference Result 694 states and 925 transitions. [2023-11-23 20:40:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-23 20:40:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 70 [2023-11-23 20:40:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:05,440 INFO L225 Difference]: With dead ends: 694 [2023-11-23 20:40:05,440 INFO L226 Difference]: Without dead ends: 507 [2023-11-23 20:40:05,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7165 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2501, Invalid=18669, Unknown=0, NotChecked=0, Total=21170 [2023-11-23 20:40:05,452 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 866 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:05,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 384 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-23 20:40:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-23 20:40:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 361. [2023-11-23 20:40:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 237 states have (on average 1.1687763713080168) internal successors, (277), 261 states have internal predecessors, (277), 60 states have call successors, (60), 54 states have call predecessors, (60), 63 states have return successors, (81), 58 states have call predecessors, (81), 60 states have call successors, (81) [2023-11-23 20:40:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 418 transitions. [2023-11-23 20:40:05,531 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 418 transitions. Word has length 70 [2023-11-23 20:40:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:05,532 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 418 transitions. [2023-11-23 20:40:05,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 20:40:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 418 transitions. [2023-11-23 20:40:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 20:40:05,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:05,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:05,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:05,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:05,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash 228706694, now seen corresponding path program 1 times [2023-11-23 20:40:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:05,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645258340] [2023-11-23 20:40:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:05,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:40:06,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645258340] [2023-11-23 20:40:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645258340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332913699] [2023-11-23 20:40:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:06,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:06,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:40:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:06,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:40:06,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:06,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:40:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332913699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383015107] [2023-11-23 20:40:07,019 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-23 20:40:07,019 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:07,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:07,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:07,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:09,461 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 18 for LOIs [2023-11-23 20:40:09,467 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2023-11-23 20:40:09,657 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 36 for LOIs [2023-11-23 20:40:09,786 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 48 for LOIs [2023-11-23 20:40:10,014 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 42 for LOIs [2023-11-23 20:40:10,047 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 13 for LOIs [2023-11-23 20:40:10,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:12,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5247#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~7#1| 0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-23 20:40:12,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:12,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:12,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-11-23 20:40:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919190500] [2023-11-23 20:40:12,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 20:40:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 20:40:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2023-11-23 20:40:12,659 INFO L87 Difference]: Start difference. First operand 361 states and 418 transitions. Second operand has 23 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 10 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2023-11-23 20:40:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:14,820 INFO L93 Difference]: Finished difference Result 1046 states and 1238 transitions. [2023-11-23 20:40:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-23 20:40:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 10 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) Word has length 69 [2023-11-23 20:40:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:14,832 INFO L225 Difference]: With dead ends: 1046 [2023-11-23 20:40:14,832 INFO L226 Difference]: Without dead ends: 687 [2023-11-23 20:40:14,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 162 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1226, Invalid=8086, Unknown=0, NotChecked=0, Total=9312 [2023-11-23 20:40:14,843 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 637 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:14,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 340 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:40:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2023-11-23 20:40:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 680. [2023-11-23 20:40:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 443 states have (on average 1.1489841986455982) internal successors, (509), 492 states have internal predecessors, (509), 116 states have call successors, (116), 99 states have call predecessors, (116), 120 states have return successors, (168), 114 states have call predecessors, (168), 116 states have call successors, (168) [2023-11-23 20:40:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 793 transitions. [2023-11-23 20:40:14,998 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 793 transitions. Word has length 69 [2023-11-23 20:40:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:15,000 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 793 transitions. [2023-11-23 20:40:15,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 10 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2023-11-23 20:40:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 793 transitions. [2023-11-23 20:40:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 20:40:15,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:15,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:15,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:15,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:15,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 638062684, now seen corresponding path program 2 times [2023-11-23 20:40:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430654365] [2023-11-23 20:40:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 20:40:15,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430654365] [2023-11-23 20:40:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430654365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101037982] [2023-11-23 20:40:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:40:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:15,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:15,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:40:16,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:40:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:40:16,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 20:40:16,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:40:16,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:40:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101037982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:40:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2023-11-23 20:40:16,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896671723] [2023-11-23 20:40:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:40:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:40:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:40:16,141 INFO L87 Difference]: Start difference. First operand 680 states and 793 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-23 20:40:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:16,420 INFO L93 Difference]: Finished difference Result 1232 states and 1449 transitions. [2023-11-23 20:40:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:40:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2023-11-23 20:40:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:16,425 INFO L225 Difference]: With dead ends: 1232 [2023-11-23 20:40:16,426 INFO L226 Difference]: Without dead ends: 571 [2023-11-23 20:40:16,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-23 20:40:16,428 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 57 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:16,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 296 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:40:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-23 20:40:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 528. [2023-11-23 20:40:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 346 states have (on average 1.1358381502890174) internal successors, (393), 381 states have internal predecessors, (393), 90 states have call successors, (90), 80 states have call predecessors, (90), 91 states have return successors, (117), 85 states have call predecessors, (117), 90 states have call successors, (117) [2023-11-23 20:40:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 600 transitions. [2023-11-23 20:40:16,534 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 600 transitions. Word has length 103 [2023-11-23 20:40:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:16,534 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 600 transitions. [2023-11-23 20:40:16,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-23 20:40:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 600 transitions. [2023-11-23 20:40:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 20:40:16,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:16,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:16,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:16,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:16,764 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:16,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1048332685, now seen corresponding path program 1 times [2023-11-23 20:40:16,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:16,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190606482] [2023-11-23 20:40:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:16,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 20:40:16,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:16,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190606482] [2023-11-23 20:40:16,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190606482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:16,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622729621] [2023-11-23 20:40:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:16,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:16,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_513e04fa-21d2-4b3c-ae99-52e03892c55f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:40:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:17,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 20:40:17,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 75 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 20:40:17,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 23 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-23 20:40:18,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622729621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:18,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109476424] [2023-11-23 20:40:18,418 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-11-23 20:40:18,418 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:18,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:18,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:18,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:21,517 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 141 for LOIs [2023-11-23 20:40:21,574 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 24 for LOIs [2023-11-23 20:40:21,958 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 9 for LOIs [2023-11-23 20:40:22,005 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 17 for LOIs [2023-11-23 20:40:22,105 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 29 for LOIs [2023-11-23 20:40:22,113 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 9 for LOIs [2023-11-23 20:40:22,115 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 52 for LOIs [2023-11-23 20:40:22,134 INFO L180 IcfgInterpreter]: Interpretation finished