./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/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_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/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_3a7a0d82-7595-41e6-b49a-8acde4778a83/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 1741a5d4e19b6faba6ff51056891b76c8b4c0acd4f550f71706571820842dcfa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:31,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:31,256 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:09:31,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:31,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:31,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:31,336 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:31,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:31,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:31,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:31,344 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:31,345 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:31,346 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:31,348 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:31,348 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:31,349 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:31,349 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:31,350 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:31,350 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:31,351 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:31,351 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:31,352 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:31,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:31,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:31,354 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:09:31,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:31,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:09:31,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:31,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:31,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:31,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:31,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:09:31,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:31,359 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:31,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:31,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:31,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:31,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:31,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:31,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:31,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:31,377 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:31,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:31,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:31,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:31,379 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:31,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:31,380 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_3a7a0d82-7595-41e6-b49a-8acde4778a83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1741a5d4e19b6faba6ff51056891b76c8b4c0acd4f550f71706571820842dcfa [2023-11-23 21:09:31,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:31,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:31,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:31,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:31,788 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:31,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c [2023-11-23 21:09:34,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:35,224 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:35,225 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c [2023-11-23 21:09:35,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/data/d76d32e54/33f6b07a1bf846c8a5020c8f31bcfa0e/FLAG27f44ef36 [2023-11-23 21:09:35,261 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/data/d76d32e54/33f6b07a1bf846c8a5020c8f31bcfa0e [2023-11-23 21:09:35,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:35,266 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:35,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:35,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:35,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:35,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd5c4af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35, skipping insertion in model container [2023-11-23 21:09:35,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,354 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:35,598 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_3a7a0d82-7595-41e6-b49a-8acde4778a83/sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c[6887,6900] [2023-11-23 21:09:35,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:35,704 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:35,713 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [49] [2023-11-23 21:09:35,715 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [121] [2023-11-23 21:09:35,715 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [369] [2023-11-23 21:09:35,716 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [397] [2023-11-23 21:09:35,716 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [435] [2023-11-23 21:09:35,716 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [444] [2023-11-23 21:09:35,716 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [540] [2023-11-23 21:09:35,717 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [906] [2023-11-23 21:09:35,747 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_3a7a0d82-7595-41e6-b49a-8acde4778a83/sv-benchmarks/c/product-lines/minepump_spec4_product55.cil.c[6887,6900] [2023-11-23 21:09:35,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:35,834 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:35,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35 WrapperNode [2023-11-23 21:09:35,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:35,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:35,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:35,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:35,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,900 INFO L138 Inliner]: procedures = 57, calls = 104, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 233 [2023-11-23 21:09:35,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:35,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:35,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:35,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:35,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,944 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:35,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:35,945 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:35,946 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:35,947 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (1/1) ... [2023-11-23 21:09:35,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:36,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:36,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:09:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:09:36,061 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:09:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:09:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:09:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:09:36,062 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:09:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:09:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:09:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:09:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 21:09:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 21:09:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:09:36,064 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:09:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:09:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:09:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:09:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:36,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:36,154 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:36,157 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:36,568 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:36,719 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:36,720 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:09:36,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:36 BoogieIcfgContainer [2023-11-23 21:09:36,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:36,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:36,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:36,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:36,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:35" (1/3) ... [2023-11-23 21:09:36,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e37614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:36, skipping insertion in model container [2023-11-23 21:09:36,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:35" (2/3) ... [2023-11-23 21:09:36,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e37614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:36, skipping insertion in model container [2023-11-23 21:09:36,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:36" (3/3) ... [2023-11-23 21:09:36,737 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product55.cil.c [2023-11-23 21:09:36,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:36,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:09:36,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:36,813 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;@68c59f1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:36,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:09:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 53 states have internal predecessors, (62), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:09:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:09:36,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:36,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:36,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:36,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash 45824597, now seen corresponding path program 1 times [2023-11-23 21:09:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:36,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539344455] [2023-11-23 21:09:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:37,039 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 21:09:37,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539344455] [2023-11-23 21:09:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539344455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:37,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732442609] [2023-11-23 21:09:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:09:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:09:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:09:37,101 INFO L87 Difference]: Start difference. First operand has 67 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 53 states have internal predecessors, (62), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) 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 21:09:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:37,171 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2023-11-23 21:09:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:09:37,174 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 21:09:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:37,183 INFO L225 Difference]: With dead ends: 132 [2023-11-23 21:09:37,183 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 21:09:37,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:09:37,190 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:37,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 21:09:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-23 21:09:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 49 states have internal predecessors, (54), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 21:09:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2023-11-23 21:09:37,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 12 [2023-11-23 21:09:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:37,239 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2023-11-23 21:09:37,239 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 21:09:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2023-11-23 21:09:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:09:37,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:37,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:37,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:37,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:37,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1839613615, now seen corresponding path program 1 times [2023-11-23 21:09:37,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:37,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961659397] [2023-11-23 21:09:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:37,428 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 21:09:37,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:37,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961659397] [2023-11-23 21:09:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961659397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:37,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:37,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:37,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227180045] [2023-11-23 21:09:37,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:37,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:37,432 INFO L87 Difference]: Start difference. First operand 62 states and 83 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 21:09:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:37,473 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2023-11-23 21:09:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:37,474 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 21:09:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:37,475 INFO L225 Difference]: With dead ends: 96 [2023-11-23 21:09:37,475 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 21:09:37,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:37,478 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 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 21:09:37,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 21:09:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-23 21:09:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.411764705882353) internal successors, (48), 44 states have internal predecessors, (48), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 7 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:09:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2023-11-23 21:09:37,489 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2023-11-23 21:09:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:37,490 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2023-11-23 21:09:37,490 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 21:09:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2023-11-23 21:09:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:09:37,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:37,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:09:37,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:37,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash -30310955, now seen corresponding path program 1 times [2023-11-23 21:09:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:37,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508471014] [2023-11-23 21:09:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:37,669 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 21:09:37,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:37,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508471014] [2023-11-23 21:09:37,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508471014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:37,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:37,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690668484] [2023-11-23 21:09:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:37,672 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:37,820 INFO L93 Difference]: Finished difference Result 149 states and 204 transitions. [2023-11-23 21:09:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 21:09:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:37,823 INFO L225 Difference]: With dead ends: 149 [2023-11-23 21:09:37,823 INFO L226 Difference]: Without dead ends: 97 [2023-11-23 21:09:37,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:37,825 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 85 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:37,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 134 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-23 21:09:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2023-11-23 21:09:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 65 states have internal predecessors, (73), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (17), 10 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-23 21:09:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2023-11-23 21:09:37,845 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 16 [2023-11-23 21:09:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:37,845 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2023-11-23 21:09:37,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2023-11-23 21:09:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:09:37,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:37,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:37,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:09:37,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 807429596, now seen corresponding path program 1 times [2023-11-23 21:09:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:37,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396540395] [2023-11-23 21:09:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:38,129 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 21:09:38,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396540395] [2023-11-23 21:09:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396540395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:38,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683293069] [2023-11-23 21:09:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:38,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:38,134 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:38,318 INFO L93 Difference]: Finished difference Result 245 states and 331 transitions. [2023-11-23 21:09:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:09:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:38,327 INFO L225 Difference]: With dead ends: 245 [2023-11-23 21:09:38,327 INFO L226 Difference]: Without dead ends: 167 [2023-11-23 21:09:38,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:38,338 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 62 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:38,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 236 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:38,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-23 21:09:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2023-11-23 21:09:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 126 states have internal predecessors, (145), 25 states have call successors, (25), 20 states have call predecessors, (25), 23 states have return successors, (31), 22 states have call predecessors, (31), 25 states have call successors, (31) [2023-11-23 21:09:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2023-11-23 21:09:38,379 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 19 [2023-11-23 21:09:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2023-11-23 21:09:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2023-11-23 21:09:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:09:38,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:38,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:09:38,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:38,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash 444180854, now seen corresponding path program 1 times [2023-11-23 21:09:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909750939] [2023-11-23 21:09:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:38,663 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 21:09:38,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909750939] [2023-11-23 21:09:38,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909750939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:38,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:38,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:09:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246410508] [2023-11-23 21:09:38,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:38,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:09:38,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:38,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:09:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:38,669 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:09:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:39,181 INFO L93 Difference]: Finished difference Result 431 states and 571 transitions. [2023-11-23 21:09:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:09:39,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-23 21:09:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:39,186 INFO L225 Difference]: With dead ends: 431 [2023-11-23 21:09:39,186 INFO L226 Difference]: Without dead ends: 353 [2023-11-23 21:09:39,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:09:39,188 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 168 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:39,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 330 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:09:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-23 21:09:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 318. [2023-11-23 21:09:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 222 states have (on average 1.2927927927927927) internal successors, (287), 251 states have internal predecessors, (287), 48 states have call successors, (48), 40 states have call predecessors, (48), 47 states have return successors, (64), 46 states have call predecessors, (64), 48 states have call successors, (64) [2023-11-23 21:09:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 399 transitions. [2023-11-23 21:09:39,239 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 399 transitions. Word has length 22 [2023-11-23 21:09:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:39,240 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 399 transitions. [2023-11-23 21:09:39,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:09:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 399 transitions. [2023-11-23 21:09:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:09:39,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:39,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:09:39,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:39,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1916683745, now seen corresponding path program 1 times [2023-11-23 21:09:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843139818] [2023-11-23 21:09:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:39,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:39,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843139818] [2023-11-23 21:09:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843139818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:39,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:09:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38186970] [2023-11-23 21:09:39,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:09:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:09:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:09:39,628 INFO L87 Difference]: Start difference. First operand 318 states and 399 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:09:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:40,005 INFO L93 Difference]: Finished difference Result 482 states and 629 transitions. [2023-11-23 21:09:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:09:40,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-11-23 21:09:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:40,013 INFO L225 Difference]: With dead ends: 482 [2023-11-23 21:09:40,013 INFO L226 Difference]: Without dead ends: 321 [2023-11-23 21:09:40,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:09:40,015 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 125 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:40,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 179 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:09:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-23 21:09:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 262. [2023-11-23 21:09:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 182 states have (on average 1.3131868131868132) internal successors, (239), 207 states have internal predecessors, (239), 40 states have call successors, (40), 32 states have call predecessors, (40), 39 states have return successors, (56), 38 states have call predecessors, (56), 40 states have call successors, (56) [2023-11-23 21:09:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 335 transitions. [2023-11-23 21:09:40,080 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 335 transitions. Word has length 49 [2023-11-23 21:09:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:40,081 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 335 transitions. [2023-11-23 21:09:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:09:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 335 transitions. [2023-11-23 21:09:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:09:40,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:40,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:09:40,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:40,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2002395261, now seen corresponding path program 1 times [2023-11-23 21:09:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:40,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430589213] [2023-11-23 21:09:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:40,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430589213] [2023-11-23 21:09:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430589213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196844043] [2023-11-23 21:09:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:40,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:40,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:09:40,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:41,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:09:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196844043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:41,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711348011] [2023-11-23 21:09:41,799 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-11-23 21:09:41,800 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:41,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:41,809 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:41,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:51,391 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 14 for LOIs [2023-11-23 21:09:51,398 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 19 for LOIs [2023-11-23 21:09:51,561 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 19 for LOIs [2023-11-23 21:09:51,617 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 19 for LOIs [2023-11-23 21:09:51,654 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 27 for LOIs [2023-11-23 21:09:51,658 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:56,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3754#(and (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (<= 0 ~pumpRunning~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-23 21:09:56,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:56,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 27 [2023-11-23 21:09:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318579558] [2023-11-23 21:09:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 21:09:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 21:09:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 21:09:56,650 INFO L87 Difference]: Start difference. First operand 262 states and 335 transitions. Second operand has 27 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-23 21:10:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:00,678 INFO L93 Difference]: Finished difference Result 1121 states and 1576 transitions. [2023-11-23 21:10:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-23 21:10:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 52 [2023-11-23 21:10:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:00,704 INFO L225 Difference]: With dead ends: 1121 [2023-11-23 21:10:00,704 INFO L226 Difference]: Without dead ends: 915 [2023-11-23 21:10:00,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2307, Invalid=14463, Unknown=0, NotChecked=0, Total=16770 [2023-11-23 21:10:00,716 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1378 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1387 Valid, 806 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:10:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-11-23 21:10:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 715. [2023-11-23 21:10:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 500 states have (on average 1.274) internal successors, (637), 554 states have internal predecessors, (637), 101 states have call successors, (101), 88 states have call predecessors, (101), 113 states have return successors, (167), 110 states have call predecessors, (167), 101 states have call successors, (167) [2023-11-23 21:10:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 905 transitions. [2023-11-23 21:10:00,801 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 905 transitions. Word has length 52 [2023-11-23 21:10:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:00,802 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 905 transitions. [2023-11-23 21:10:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-23 21:10:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 905 transitions. [2023-11-23 21:10:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 21:10:00,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:00,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-23 21:10:00,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:01,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 383113064, now seen corresponding path program 1 times [2023-11-23 21:10:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:01,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170930778] [2023-11-23 21:10:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:10:01,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170930778] [2023-11-23 21:10:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170930778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708152693] [2023-11-23 21:10:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:01,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:10:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:01,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:10:01,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:10:01,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:10:01,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708152693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:01,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:10:01,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-23 21:10:01,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921033140] [2023-11-23 21:10:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:01,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:01,212 INFO L87 Difference]: Start difference. First operand 715 states and 905 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:10:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:01,323 INFO L93 Difference]: Finished difference Result 1442 states and 1821 transitions. [2023-11-23 21:10:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2023-11-23 21:10:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:01,328 INFO L225 Difference]: With dead ends: 1442 [2023-11-23 21:10:01,329 INFO L226 Difference]: Without dead ends: 620 [2023-11-23 21:10:01,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:01,332 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 32 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:01,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:10:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-11-23 21:10:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 588. [2023-11-23 21:10:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 407 states have (on average 1.240786240786241) internal successors, (505), 448 states have internal predecessors, (505), 83 states have call successors, (83), 72 states have call predecessors, (83), 97 states have return successors, (128), 93 states have call predecessors, (128), 83 states have call successors, (128) [2023-11-23 21:10:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 716 transitions. [2023-11-23 21:10:01,395 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 716 transitions. Word has length 86 [2023-11-23 21:10:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:01,396 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 716 transitions. [2023-11-23 21:10:01,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:10:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 716 transitions. [2023-11-23 21:10:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:10:01,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:01,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:01,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:01,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:10:01,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:01,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -720898451, now seen corresponding path program 1 times [2023-11-23 21:10:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:01,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306809316] [2023-11-23 21:10:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:01,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:10:02,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:02,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306809316] [2023-11-23 21:10:02,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306809316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:02,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062238021] [2023-11-23 21:10:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:02,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:02,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:10:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:02,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:10:02,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:10:02,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:10:03,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062238021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:10:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729292899] [2023-11-23 21:10:03,528 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2023-11-23 21:10:03,528 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:10:03,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:10:03,529 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:10:03,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:10:06,089 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 136 for LOIs [2023-11-23 21:10:06,205 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2023-11-23 21:10:06,458 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 28 for LOIs [2023-11-23 21:10:06,549 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 31 for LOIs [2023-11-23 21:10:06,606 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 22 for LOIs [2023-11-23 21:10:06,610 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 26 for LOIs [2023-11-23 21:10:06,613 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:10:10,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9748#(and (or (and (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_22| Int)) (and (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_22| 0)) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_22| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_22| 2147483647))) (= |old(~pumpRunning~0)| 0) (= |old(~waterLevel~0)| 0) (not (= 0 ~systemActive~0))) (and (<= |timeShift_isMethaneAlarm_#res#1| 2147483647) (<= |timeShift_isMethaneLevelCritical_#res#1| 2147483647) (<= 0 (+ |timeShift_isMethaneAlarm_#res#1| 2147483648)) (<= ~methaneLevelCritical~0 2147483647) (<= 0 (+ ~methaneLevelCritical~0 2147483648)) (<= 0 (+ |timeShift_isMethaneLevelCritical_#res#1| 2147483648)))) (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 0)) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~6#1| 0) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1| 2147483648)) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~3#1|) (= ~waterLevel~0 0))' at error location [2023-11-23 21:10:10,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:10:10,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:10:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 37 [2023-11-23 21:10:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807428736] [2023-11-23 21:10:10,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:10:10,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 21:10:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 21:10:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4711, Unknown=0, NotChecked=0, Total=5256 [2023-11-23 21:10:10,019 INFO L87 Difference]: Start difference. First operand 588 states and 716 transitions. Second operand has 37 states, 34 states have (on average 3.676470588235294) internal successors, (125), 32 states have internal predecessors, (125), 17 states have call successors, (24), 10 states have call predecessors, (24), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-23 21:10:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:15,727 INFO L93 Difference]: Finished difference Result 2556 states and 3367 transitions. [2023-11-23 21:10:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-23 21:10:15,728 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.676470588235294) internal successors, (125), 32 states have internal predecessors, (125), 17 states have call successors, (24), 10 states have call predecessors, (24), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) Word has length 83 [2023-11-23 21:10:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:15,743 INFO L225 Difference]: With dead ends: 2556 [2023-11-23 21:10:15,743 INFO L226 Difference]: Without dead ends: 1999 [2023-11-23 21:10:15,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11407 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3727, Invalid=25685, Unknown=0, NotChecked=0, Total=29412 [2023-11-23 21:10:15,759 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 2489 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 3866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:15,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2501 Valid, 2053 Invalid, 3866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:10:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2023-11-23 21:10:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1478. [2023-11-23 21:10:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1044 states have (on average 1.2586206896551724) internal successors, (1314), 1142 states have internal predecessors, (1314), 200 states have call successors, (200), 164 states have call predecessors, (200), 233 states have return successors, (366), 233 states have call predecessors, (366), 200 states have call successors, (366) [2023-11-23 21:10:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1880 transitions. [2023-11-23 21:10:15,927 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1880 transitions. Word has length 83 [2023-11-23 21:10:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:15,928 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 1880 transitions. [2023-11-23 21:10:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.676470588235294) internal successors, (125), 32 states have internal predecessors, (125), 17 states have call successors, (24), 10 states have call predecessors, (24), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-23 21:10:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1880 transitions. [2023-11-23 21:10:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 21:10:15,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:15,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:15,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:16,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:16,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:16,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1059409143, now seen corresponding path program 2 times [2023-11-23 21:10:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:16,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499431949] [2023-11-23 21:10:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:16,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:10:17,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499431949] [2023-11-23 21:10:17,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499431949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:17,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589310105] [2023-11-23 21:10:17,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:10:17,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:17,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:17,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:10:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 21:10:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:10:17,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:10:17,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-23 21:10:17,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-23 21:10:17,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589310105] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:17,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:10:17,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [20, 3] total 22 [2023-11-23 21:10:17,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025938627] [2023-11-23 21:10:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:10:17,510 INFO L87 Difference]: Start difference. First operand 1478 states and 1880 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:10:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:17,854 INFO L93 Difference]: Finished difference Result 4346 states and 5601 transitions. [2023-11-23 21:10:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:10:17,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 99 [2023-11-23 21:10:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:17,875 INFO L225 Difference]: With dead ends: 4346 [2023-11-23 21:10:17,876 INFO L226 Difference]: Without dead ends: 2904 [2023-11-23 21:10:17,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:10:17,884 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:17,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 196 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:10:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2023-11-23 21:10:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2708. [2023-11-23 21:10:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 1970 states have (on average 1.2517766497461928) internal successors, (2466), 2097 states have internal predecessors, (2466), 328 states have call successors, (328), 271 states have call predecessors, (328), 409 states have return successors, (660), 414 states have call predecessors, (660), 328 states have call successors, (660) [2023-11-23 21:10:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 3454 transitions. [2023-11-23 21:10:18,207 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 3454 transitions. Word has length 99 [2023-11-23 21:10:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:18,207 INFO L495 AbstractCegarLoop]: Abstraction has 2708 states and 3454 transitions. [2023-11-23 21:10:18,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-23 21:10:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 3454 transitions. [2023-11-23 21:10:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:10:18,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:18,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:18,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a7a0d82-7595-41e6-b49a-8acde4778a83/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:18,436 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:18,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 294592497, now seen corresponding path program 1 times [2023-11-23 21:10:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:18,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488847655] [2023-11-23 21:10:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat