./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ --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 fd0b8ceecda33bdad48c402c2c8ba6fe539641c6d50bf604e9c60e70c71a562b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:19:39,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:19:39,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:19:39,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:19:39,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:19:39,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:19:39,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:19:39,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:19:39,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:19:39,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:19:39,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:19:39,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:19:39,173 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:19:39,173 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:19:39,174 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:19:39,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:19:39,175 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:19:39,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:19:39,176 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:19:39,177 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:19:39,177 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:19:39,178 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:19:39,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:19:39,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:19:39,180 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:19:39,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:19:39,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:19:39,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:19:39,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:19:39,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:19:39,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:19:39,184 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:19:39,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:19:39,185 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:19:39,185 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:19:39,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:19:39,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:39,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:19:39,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:19:39,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:19:39,188 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:19:39,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:19:39,189 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:19:39,189 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:19:39,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:19:39,189 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_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd0b8ceecda33bdad48c402c2c8ba6fe539641c6d50bf604e9c60e70c71a562b [2023-11-19 05:19:39,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:19:39,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:19:39,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:19:39,526 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:19:39,530 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:19:39,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c [2023-11-19 05:19:42,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:19:43,323 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:19:43,324 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c [2023-11-19 05:19:43,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/data/d0be8f490/4472606c643644f58a0bb148a11884a9/FLAGda90e92d7 [2023-11-19 05:19:43,365 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/data/d0be8f490/4472606c643644f58a0bb148a11884a9 [2023-11-19 05:19:43,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:19:43,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:19:43,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:43,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:19:43,381 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:19:43,382 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:43" (1/1) ... [2023-11-19 05:19:43,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71334aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:43, skipping insertion in model container [2023-11-19 05:19:43,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:19:43" (1/1) ... [2023-11-19 05:19:43,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:19:43,750 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_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c[6160,6173] [2023-11-19 05:19:43,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:43,880 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:19:43,894 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [49] [2023-11-19 05:19:43,896 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [316] [2023-11-19 05:19:43,897 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [386] [2023-11-19 05:19:43,897 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [395] [2023-11-19 05:19:43,898 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [761] [2023-11-19 05:19:43,898 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [860] [2023-11-19 05:19:43,898 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [886] [2023-11-19 05:19:43,899 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [990] [2023-11-19 05:19:43,922 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_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/sv-benchmarks/c/product-lines/minepump_spec1_product63.cil.c[6160,6173] [2023-11-19 05:19:43,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:19:44,010 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:19:44,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44 WrapperNode [2023-11-19 05:19:44,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:19:44,012 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:44,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:19:44,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:19:44,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,056 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,100 INFO L138 Inliner]: procedures = 58, calls = 106, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 220 [2023-11-19 05:19:44,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:19:44,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:19:44,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:19:44,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:19:44,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,135 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:19:44,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:19:44,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:19:44,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:19:44,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (1/1) ... [2023-11-19 05:19:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:19:44,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:44,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:19:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:19:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:19:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 05:19:44,340 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 05:19:44,341 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:19:44,341 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:19:44,341 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-19 05:19:44,341 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-19 05:19:44,342 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:19:44,342 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:19:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:19:44,343 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:19:44,343 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 05:19:44,344 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 05:19:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 05:19:44,345 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 05:19:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 05:19:44,347 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 05:19:44,347 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 05:19:44,348 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 05:19:44,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:19:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 05:19:44,349 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 05:19:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:19:44,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:19:44,528 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:19:44,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:19:44,986 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:19:45,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:19:45,151 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:19:45,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:45 BoogieIcfgContainer [2023-11-19 05:19:45,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:19:45,162 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:19:45,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:19:45,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:19:45,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:19:43" (1/3) ... [2023-11-19 05:19:45,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5279675d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:45, skipping insertion in model container [2023-11-19 05:19:45,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:19:44" (2/3) ... [2023-11-19 05:19:45,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5279675d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:19:45, skipping insertion in model container [2023-11-19 05:19:45,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:19:45" (3/3) ... [2023-11-19 05:19:45,172 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product63.cil.c [2023-11-19 05:19:45,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:19:45,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:19:45,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:19:45,272 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;@33561627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:19:45,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:19:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 59 states have internal predecessors, (68), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-19 05:19:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:19:45,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:45,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:45,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:45,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1876830135, now seen corresponding path program 1 times [2023-11-19 05:19:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:45,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132966304] [2023-11-19 05:19:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:45,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132966304] [2023-11-19 05:19:45,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132966304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:19:45,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200690761] [2023-11-19 05:19:45,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:19:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:19:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:19:45,611 INFO L87 Difference]: Start difference. First operand has 79 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 59 states have internal predecessors, (68), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:45,712 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-11-19 05:19:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:19:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 05:19:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:45,728 INFO L225 Difference]: With dead ends: 156 [2023-11-19 05:19:45,728 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 05:19:45,733 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 [2023-11-19 05:19:45,738 INFO L413 NwaCegarLoop]: 85 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, 85 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:45,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 05:19:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-19 05:19:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 55 states have internal predecessors, (60), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 05:19:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-11-19 05:19:45,801 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 16 [2023-11-19 05:19:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:45,802 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-11-19 05:19:45,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-11-19 05:19:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:19:45,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:45,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:45,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:19:45,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:45,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash -744674085, now seen corresponding path program 1 times [2023-11-19 05:19:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887516059] [2023-11-19 05:19:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:45,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:45,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887516059] [2023-11-19 05:19:45,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887516059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:45,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457762425] [2023-11-19 05:19:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:45,998 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:46,078 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2023-11-19 05:19:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 05:19:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:46,081 INFO L225 Difference]: With dead ends: 120 [2023-11-19 05:19:46,082 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 05:19:46,083 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 [2023-11-19 05:19:46,085 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:46,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 125 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 05:19:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 05:19:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.35) internal successors, (54), 50 states have internal predecessors, (54), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 05:19:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-19 05:19:46,103 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 17 [2023-11-19 05:19:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:46,103 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-19 05:19:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-19 05:19:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:19:46,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:46,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:46,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:19:46,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:46,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1943798910, now seen corresponding path program 1 times [2023-11-19 05:19:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916074238] [2023-11-19 05:19:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:46,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916074238] [2023-11-19 05:19:46,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916074238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:46,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:46,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:19:46,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392474683] [2023-11-19 05:19:46,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:46,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:19:46,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:19:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:19:46,314 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:46,518 INFO L93 Difference]: Finished difference Result 194 states and 255 transitions. [2023-11-19 05:19:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:19:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 05:19:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:46,523 INFO L225 Difference]: With dead ends: 194 [2023-11-19 05:19:46,523 INFO L226 Difference]: Without dead ends: 130 [2023-11-19 05:19:46,524 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 [2023-11-19 05:19:46,527 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 73 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:46,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-19 05:19:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2023-11-19 05:19:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 76 states have (on average 1.355263157894737) internal successors, (103), 95 states have internal predecessors, (103), 32 states have call successors, (32), 18 states have call predecessors, (32), 18 states have return successors, (32), 21 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 05:19:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2023-11-19 05:19:46,582 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 20 [2023-11-19 05:19:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:46,583 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2023-11-19 05:19:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 05:19:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2023-11-19 05:19:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 05:19:46,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:46,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:19:46,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:46,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1349200949, now seen corresponding path program 1 times [2023-11-19 05:19:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24952395] [2023-11-19 05:19:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:46,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24952395] [2023-11-19 05:19:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24952395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:46,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:46,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:19:46,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140178608] [2023-11-19 05:19:46,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:19:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:46,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:19:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:19:46,883 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 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) [2023-11-19 05:19:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:47,192 INFO L93 Difference]: Finished difference Result 373 states and 496 transitions. [2023-11-19 05:19:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:19:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 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 23 [2023-11-19 05:19:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:47,200 INFO L225 Difference]: With dead ends: 373 [2023-11-19 05:19:47,200 INFO L226 Difference]: Without dead ends: 248 [2023-11-19 05:19:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:19:47,204 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 63 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:47,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 311 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-19 05:19:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 242. [2023-11-19 05:19:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 180 states have internal predecessors, (195), 62 states have call successors, (62), 34 states have call predecessors, (62), 34 states have return successors, (62), 40 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 05:19:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 319 transitions. [2023-11-19 05:19:47,314 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 319 transitions. Word has length 23 [2023-11-19 05:19:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:47,315 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 319 transitions. [2023-11-19 05:19:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 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) [2023-11-19 05:19:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 319 transitions. [2023-11-19 05:19:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 05:19:47,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:47,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:47,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:19:47,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:47,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1451873038, now seen corresponding path program 1 times [2023-11-19 05:19:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42317049] [2023-11-19 05:19:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:47,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42317049] [2023-11-19 05:19:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42317049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:47,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:47,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:19:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013585093] [2023-11-19 05:19:47,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:47,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:19:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:19:47,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:19:47,490 INFO L87 Difference]: Start difference. First operand 242 states and 319 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:19:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:47,642 INFO L93 Difference]: Finished difference Result 650 states and 874 transitions. [2023-11-19 05:19:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:19:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-11-19 05:19:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:47,648 INFO L225 Difference]: With dead ends: 650 [2023-11-19 05:19:47,648 INFO L226 Difference]: Without dead ends: 410 [2023-11-19 05:19:47,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:19:47,654 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:47,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 190 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:19:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-19 05:19:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 404. [2023-11-19 05:19:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 259 states have (on average 1.2702702702702702) internal successors, (329), 288 states have internal predecessors, (329), 80 states have call successors, (80), 64 states have call predecessors, (80), 64 states have return successors, (104), 70 states have call predecessors, (104), 80 states have call successors, (104) [2023-11-19 05:19:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 513 transitions. [2023-11-19 05:19:47,707 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 513 transitions. Word has length 26 [2023-11-19 05:19:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:47,707 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 513 transitions. [2023-11-19 05:19:47,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 05:19:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 513 transitions. [2023-11-19 05:19:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:19:47,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:47,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:47,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:19:47,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:47,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:47,722 INFO L85 PathProgramCache]: Analyzing trace with hash -624663579, now seen corresponding path program 1 times [2023-11-19 05:19:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257802382] [2023-11-19 05:19:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:47,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:19:48,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:48,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257802382] [2023-11-19 05:19:48,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257802382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:19:48,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:19:48,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:19:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190495669] [2023-11-19 05:19:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:19:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:19:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:19:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:19:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:19:48,234 INFO L87 Difference]: Start difference. First operand 404 states and 513 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:19:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:19:48,567 INFO L93 Difference]: Finished difference Result 1053 states and 1341 transitions. [2023-11-19 05:19:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:19:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2023-11-19 05:19:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:19:48,574 INFO L225 Difference]: With dead ends: 1053 [2023-11-19 05:19:48,575 INFO L226 Difference]: Without dead ends: 651 [2023-11-19 05:19:48,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:19:48,579 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 87 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:19:48,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 350 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:19:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-19 05:19:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 586. [2023-11-19 05:19:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 387 states have (on average 1.2609819121447028) internal successors, (488), 417 states have internal predecessors, (488), 99 states have call successors, (99), 87 states have call predecessors, (99), 99 states have return successors, (135), 99 states have call predecessors, (135), 99 states have call successors, (135) [2023-11-19 05:19:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 722 transitions. [2023-11-19 05:19:48,663 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 722 transitions. Word has length 44 [2023-11-19 05:19:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:19:48,663 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 722 transitions. [2023-11-19 05:19:48,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:19:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 722 transitions. [2023-11-19 05:19:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:19:48,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:19:48,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:19:48,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:19:48,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:19:48,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:19:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1543912056, now seen corresponding path program 1 times [2023-11-19 05:19:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:19:48,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600579175] [2023-11-19 05:19:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:19:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:19:49,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:19:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600579175] [2023-11-19 05:19:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600579175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:19:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066918588] [2023-11-19 05:19:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:19:49,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:19:49,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:19:49,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:19:49,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:19:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:19:49,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 05:19:49,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:19:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:19:50,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:19:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:19:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066918588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:19:50,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787222829] [2023-11-19 05:19:50,788 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-11-19 05:19:50,789 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:19:50,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:19:50,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:19:50,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:19:53,359 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-19 05:19:53,438 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 141 for LOIs [2023-11-19 05:19:58,395 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 138 for LOIs [2023-11-19 05:19:59,736 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 138 for LOIs [2023-11-19 05:20:01,229 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 138 for LOIs [2023-11-19 05:20:02,206 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 156 for LOIs [2023-11-19 05:20:02,522 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 126 for LOIs [2023-11-19 05:20:02,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:20:19,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6019#(and (<= 1 |#StackHeapBarrier|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification1_spec__1_~tmp___0~3#1|) (<= ~methaneLevelCritical~0 1) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp~11#1| 0)) (= |timeShift___utac_acc__Specification1_spec__1_~tmp~11#1| ~methaneLevelCritical~0) (= ~head~0.offset 0) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (exists ((|v_ULTIMATE.start_test_~tmp___0~2#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_test_~tmp~6#1_BEFORE_CALL_5| Int)) (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= 30 (select |#length| 7)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#valid| 9) 1) (= (select |#length| 12) 25) (= (select |#valid| 11) 1) (not (= |v_ULTIMATE.start_test_~tmp~6#1_BEFORE_CALL_5| 0)) (= 30 (select |#length| 4)) (= 31 (select |#length| 2)) (<= |v_ULTIMATE.start_test_~tmp~6#1_BEFORE_CALL_5| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___0~2#1_BEFORE_CALL_3|)) (= 2 (select |#length| 1)) (not (= 0 |v_ULTIMATE.start_test_~tmp___0~2#1_BEFORE_CALL_3|)) (= (select |#length| 8) 9) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= 30 (select |#length| 13)) (<= |v_ULTIMATE.start_test_~tmp___0~2#1_BEFORE_CALL_3| 2147483647) (= 30 (select |#length| 10)) (= (select |#valid| 12) 1) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~6#1_BEFORE_CALL_5| 2147483648)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= 9 (select |#length| 11)) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select |#valid| 13) 1))) (<= 2 |old(~waterLevel~0)|) (<= 0 ~methaneLevelCritical~0) (= |old(~waterLevel~0)| ~waterLevel~0) (= ~head~0.base 0) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_29| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret7#1_29| 0) (= ~pumpRunning~0 1))) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| Int)) (and (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 0)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1|)))) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-19 05:20:19,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:20:19,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:20:19,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 32 [2023-11-19 05:20:19,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539856647] [2023-11-19 05:20:19,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:20:19,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 05:20:19,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 05:20:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 05:20:19,657 INFO L87 Difference]: Start difference. First operand 586 states and 722 transitions. Second operand has 32 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 9 states have call successors, (21), 7 states have call predecessors, (21), 14 states have return successors, (20), 16 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 05:20:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:25,979 INFO L93 Difference]: Finished difference Result 2491 states and 3387 transitions. [2023-11-19 05:20:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-19 05:20:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 9 states have call successors, (21), 7 states have call predecessors, (21), 14 states have return successors, (20), 16 states have call predecessors, (20), 9 states have call successors, (20) Word has length 47 [2023-11-19 05:20:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:25,994 INFO L225 Difference]: With dead ends: 2491 [2023-11-19 05:20:25,994 INFO L226 Difference]: Without dead ends: 1829 [2023-11-19 05:20:26,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6829 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=2254, Invalid=16652, Unknown=0, NotChecked=0, Total=18906 [2023-11-19 05:20:26,007 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1302 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 3914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 1138 Invalid, 3914 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [786 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 05:20:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2023-11-19 05:20:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1253. [2023-11-19 05:20:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 828 states have (on average 1.213768115942029) internal successors, (1005), 883 states have internal predecessors, (1005), 204 states have call successors, (204), 171 states have call predecessors, (204), 220 states have return successors, (290), 231 states have call predecessors, (290), 204 states have call successors, (290) [2023-11-19 05:20:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1499 transitions. [2023-11-19 05:20:26,194 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1499 transitions. Word has length 47 [2023-11-19 05:20:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:26,195 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1499 transitions. [2023-11-19 05:20:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 9 states have call successors, (21), 7 states have call predecessors, (21), 14 states have return successors, (20), 16 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 05:20:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1499 transitions. [2023-11-19 05:20:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:20:26,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:26,203 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:26,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:20:26,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf6b0a02-845d-49fb-acf0-25b4fe62ece2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:20:26,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:26,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 418200349, now seen corresponding path program 1 times [2023-11-19 05:20:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038297000] [2023-11-19 05:20:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:20:26,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038297000] [2023-11-19 05:20:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038297000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:26,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:26,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:26,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648799198] [2023-11-19 05:20:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:26,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:26,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:26,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:26,479 INFO L87 Difference]: Start difference. First operand 1253 states and 1499 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:20:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:26,632 INFO L93 Difference]: Finished difference Result 1406 states and 1691 transitions. [2023-11-19 05:20:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:20:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2023-11-19 05:20:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:26,637 INFO L225 Difference]: With dead ends: 1406 [2023-11-19 05:20:26,637 INFO L226 Difference]: Without dead ends: 639 [2023-11-19 05:20:26,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:26,641 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 106 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:26,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 146 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-11-19 05:20:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 617. [2023-11-19 05:20:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 403 states have (on average 1.15136476426799) internal successors, (464), 428 states have internal predecessors, (464), 101 states have call successors, (101), 88 states have call predecessors, (101), 112 states have return successors, (141), 115 states have call predecessors, (141), 101 states have call successors, (141) [2023-11-19 05:20:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 706 transitions. [2023-11-19 05:20:26,717 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 706 transitions. Word has length 65 [2023-11-19 05:20:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:26,719 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 706 transitions. [2023-11-19 05:20:26,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:20:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 706 transitions. [2023-11-19 05:20:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:20:26,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:26,722 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:26,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:20:26,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:26,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 61411034, now seen corresponding path program 1 times [2023-11-19 05:20:26,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:26,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681212261] [2023-11-19 05:20:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:26,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 05:20:26,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681212261] [2023-11-19 05:20:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681212261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 05:20:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172945488] [2023-11-19 05:20:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:20:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:20:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:20:26,960 INFO L87 Difference]: Start difference. First operand 617 states and 706 transitions. Second operand has 10 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:20:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:27,303 INFO L93 Difference]: Finished difference Result 1232 states and 1438 transitions. [2023-11-19 05:20:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 05:20:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) Word has length 90 [2023-11-19 05:20:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:27,305 INFO L225 Difference]: With dead ends: 1232 [2023-11-19 05:20:27,305 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:20:27,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:20:27,309 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 65 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:27,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 365 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:20:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:20:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:20:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:20:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:20:27,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2023-11-19 05:20:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:27,311 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:20:27,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 2 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:20:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:20:27,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:20:27,314 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:20:27,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:20:27,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.