./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product46.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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product46.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/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 5780768f89256c506186805750dd5ec09f07e7c3b9baffd6ca5edbcb4a88d3de --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:15:29,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:15:29,211 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:15:29,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:15:29,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:15:29,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:15:29,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:15:29,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:15:29,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:15:29,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:15:29,275 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:15:29,277 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:15:29,277 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:15:29,279 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:15:29,280 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:15:29,280 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:15:29,281 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:15:29,281 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:15:29,282 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:15:29,283 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:15:29,283 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:15:29,284 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:15:29,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:15:29,286 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:15:29,286 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:15:29,287 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:15:29,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:15:29,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:15:29,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:15:29,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:15:29,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:15:29,291 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:15:29,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:15:29,292 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:15:29,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:15:29,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:15:29,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:29,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:15:29,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:15:29,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:15:29,295 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:15:29,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:15:29,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:15:29,296 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:15:29,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:15:29,297 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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5780768f89256c506186805750dd5ec09f07e7c3b9baffd6ca5edbcb4a88d3de [2023-11-19 04:15:29,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:15:29,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:15:29,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:15:29,614 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:15:29,614 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:15:29,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec1_product46.cil.c [2023-11-19 04:15:33,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:15:33,444 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:15:33,445 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/sv-benchmarks/c/product-lines/minepump_spec1_product46.cil.c [2023-11-19 04:15:33,475 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/data/80e582996/77d8aba649134a0799070c405a7d6747/FLAGe8495268c [2023-11-19 04:15:33,495 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/data/80e582996/77d8aba649134a0799070c405a7d6747 [2023-11-19 04:15:33,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:15:33,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:15:33,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:33,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:15:33,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:15:33,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:33" (1/1) ... [2023-11-19 04:15:33,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ec00b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:33, skipping insertion in model container [2023-11-19 04:15:33,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:15:33" (1/1) ... [2023-11-19 04:15:33,608 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:15:33,916 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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/sv-benchmarks/c/product-lines/minepump_spec1_product46.cil.c[7019,7032] [2023-11-19 04:15:33,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:34,007 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:15:34,020 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [49] [2023-11-19 04:15:34,022 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [121] [2023-11-19 04:15:34,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [333] [2023-11-19 04:15:34,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [432] [2023-11-19 04:15:34,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [467] [2023-11-19 04:15:34,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [476] [2023-11-19 04:15:34,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [502] [2023-11-19 04:15:34,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [597] [2023-11-19 04:15:34,050 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_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/sv-benchmarks/c/product-lines/minepump_spec1_product46.cil.c[7019,7032] [2023-11-19 04:15:34,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:15:34,127 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:15:34,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34 WrapperNode [2023-11-19 04:15:34,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:15:34,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:34,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:15:34,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:15:34,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,190 INFO L138 Inliner]: procedures = 55, calls = 100, calls flagged for inlining = 22, calls inlined = 19, statements flattened = 188 [2023-11-19 04:15:34,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:15:34,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:15:34,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:15:34,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:15:34,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,217 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:15:34,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:15:34,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:15:34,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:15:34,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (1/1) ... [2023-11-19 04:15:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:15:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:34,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:15:34,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:15:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:15:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:15:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:15:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-19 04:15:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-19 04:15:34,339 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:15:34,339 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:15:34,340 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:15:34,340 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:15:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:15:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:15:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:15:34,342 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:15:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 04:15:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 04:15:34,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:15:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:15:34,345 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:15:34,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:15:34,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:15:34,445 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:15:34,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:15:34,848 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:15:35,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:15:35,077 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:15:35,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:35 BoogieIcfgContainer [2023-11-19 04:15:35,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:15:35,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:15:35,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:15:35,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:15:35,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:15:33" (1/3) ... [2023-11-19 04:15:35,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbee094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:35, skipping insertion in model container [2023-11-19 04:15:35,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:15:34" (2/3) ... [2023-11-19 04:15:35,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbee094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:15:35, skipping insertion in model container [2023-11-19 04:15:35,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:15:35" (3/3) ... [2023-11-19 04:15:35,094 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product46.cil.c [2023-11-19 04:15:35,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:15:35,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:15:35,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:15:35,184 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;@1d05ed37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:15:35,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:15:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 states have internal predecessors, (54), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 04:15:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:15:35,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:35,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:35,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1110266704, now seen corresponding path program 1 times [2023-11-19 04:15:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462804775] [2023-11-19 04:15:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:35,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:35,518 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 04:15:35,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462804775] [2023-11-19 04:15:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462804775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:15:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990070780] [2023-11-19 04:15:35,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:35,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:15:35,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:15:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:15:35,588 INFO L87 Difference]: Start difference. First operand has 63 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 47 states have internal predecessors, (54), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) 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 04:15:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:35,723 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-11-19 04:15:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:15:35,728 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 04:15:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:35,741 INFO L225 Difference]: With dead ends: 124 [2023-11-19 04:15:35,741 INFO L226 Difference]: Without dead ends: 58 [2023-11-19 04:15:35,749 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 04:15:35,757 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:35,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-19 04:15:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-19 04:15:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 43 states have internal predecessors, (46), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 04:15:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-11-19 04:15:35,814 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 16 [2023-11-19 04:15:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:35,815 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-11-19 04:15:35,815 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 04:15:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-11-19 04:15:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:15:35,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:35,819 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 04:15:35,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:15:35,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:35,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1740907951, now seen corresponding path program 1 times [2023-11-19 04:15:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:35,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696855964] [2023-11-19 04:15:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:35,931 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 04:15:35,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696855964] [2023-11-19 04:15:35,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696855964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:35,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:35,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:15:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519943078] [2023-11-19 04:15:35,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:35,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:15:35,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:15:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:15:35,937 INFO L87 Difference]: Start difference. First operand 58 states and 73 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 04:15:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:36,006 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2023-11-19 04:15:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:15:36,007 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 04:15:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:36,010 INFO L225 Difference]: With dead ends: 93 [2023-11-19 04:15:36,010 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 04:15:36,012 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 04:15:36,014 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:36,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 04:15:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-19 04:15:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 04:15:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-11-19 04:15:36,049 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 17 [2023-11-19 04:15:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:36,049 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-11-19 04:15:36,050 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 04:15:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-11-19 04:15:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:15:36,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:36,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:15:36,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:36,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795688, now seen corresponding path program 1 times [2023-11-19 04:15:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:36,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199827025] [2023-11-19 04:15:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:36,346 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 04:15:36,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199827025] [2023-11-19 04:15:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199827025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:36,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:15:36,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847152108] [2023-11-19 04:15:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:15:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:15:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:15:36,351 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 04:15:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:36,624 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2023-11-19 04:15:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:15:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 19 [2023-11-19 04:15:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:36,629 INFO L225 Difference]: With dead ends: 143 [2023-11-19 04:15:36,629 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 04:15:36,630 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 04:15:36,632 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 43 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:36,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 206 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:15:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 04:15:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2023-11-19 04:15:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.280701754385965) internal successors, (73), 69 states have internal predecessors, (73), 21 states have call successors, (21), 13 states have call predecessors, (21), 13 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 04:15:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2023-11-19 04:15:36,655 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 19 [2023-11-19 04:15:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:36,655 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2023-11-19 04:15:36,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 04:15:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2023-11-19 04:15:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:15:36,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:36,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:15:36,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:15:36,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:36,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash -127763223, now seen corresponding path program 1 times [2023-11-19 04:15:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:36,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127303373] [2023-11-19 04:15:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:36,789 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 04:15:36,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:36,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127303373] [2023-11-19 04:15:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127303373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:36,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:15:36,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:15:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279130278] [2023-11-19 04:15:36,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:15:36,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:15:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:15:36,793 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:36,894 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2023-11-19 04:15:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:15:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 22 [2023-11-19 04:15:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:36,903 INFO L225 Difference]: With dead ends: 252 [2023-11-19 04:15:36,903 INFO L226 Difference]: Without dead ends: 162 [2023-11-19 04:15:36,907 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 04:15:36,917 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:36,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 130 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-19 04:15:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2023-11-19 04:15:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 114 states have internal predecessors, (126), 30 states have call successors, (30), 26 states have call predecessors, (30), 26 states have return successors, (38), 30 states have call predecessors, (38), 30 states have call successors, (38) [2023-11-19 04:15:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2023-11-19 04:15:36,964 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 22 [2023-11-19 04:15:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:36,965 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2023-11-19 04:15:36,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2023-11-19 04:15:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 04:15:36,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:36,968 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] [2023-11-19 04:15:36,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:15:36,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:36,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash 321518248, now seen corresponding path program 1 times [2023-11-19 04:15:36,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:36,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25938016] [2023-11-19 04:15:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:36,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:37,529 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 04:15:37,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:37,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25938016] [2023-11-19 04:15:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25938016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016143593] [2023-11-19 04:15:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:37,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:37,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:15:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:37,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:15:37,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:38,014 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 04:15:38,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:15:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016143593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:15:38,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:15:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2023-11-19 04:15:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265249484] [2023-11-19 04:15:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:15:38,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:15:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:15:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:15:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:15:38,022 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:15:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:15:38,242 INFO L93 Difference]: Finished difference Result 382 states and 465 transitions. [2023-11-19 04:15:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:15:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-19 04:15:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:15:38,245 INFO L225 Difference]: With dead ends: 382 [2023-11-19 04:15:38,246 INFO L226 Difference]: Without dead ends: 224 [2023-11-19 04:15:38,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-19 04:15:38,248 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 54 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:15:38,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 136 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:15:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-19 04:15:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2023-11-19 04:15:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 145 states have (on average 1.206896551724138) internal successors, (175), 157 states have internal predecessors, (175), 39 states have call successors, (39), 35 states have call predecessors, (39), 35 states have return successors, (47), 39 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-19 04:15:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 261 transitions. [2023-11-19 04:15:38,286 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 261 transitions. Word has length 38 [2023-11-19 04:15:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:15:38,287 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 261 transitions. [2023-11-19 04:15:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:15:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 261 transitions. [2023-11-19 04:15:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:15:38,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:15:38,291 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] [2023-11-19 04:15:38,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:15:38,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:38,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:15:38,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:15:38,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1468656941, now seen corresponding path program 1 times [2023-11-19 04:15:38,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:15:38,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222248141] [2023-11-19 04:15:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:38,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:15:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:38,911 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 04:15:38,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:15:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222248141] [2023-11-19 04:15:38,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222248141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:15:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337078426] [2023-11-19 04:15:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:15:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:15:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:15:38,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:15:38,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:15:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:15:39,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 04:15:39,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:15:39,651 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 04:15:39,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:15:40,240 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 04:15:40,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337078426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:15:40,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216225735] [2023-11-19 04:15:40,265 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-19 04:15:40,265 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:15:40,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:15:40,278 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:15:40,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:15:42,604 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-19 04:15:42,666 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 148 for LOIs [2023-11-19 04:15:46,561 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 147 for LOIs [2023-11-19 04:15:48,000 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 147 for LOIs [2023-11-19 04:15:49,213 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 165 for LOIs [2023-11-19 04:15:49,625 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 126 for LOIs [2023-11-19 04:15:49,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:16:10,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2669#(and (<= 1 |#StackHeapBarrier|) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp~6#1| 0)) (exists ((|v_processEnvironment__wrappee__methaneQuery_activatePump_#t~ret10#1_25| Int)) (and (= |v_processEnvironment__wrappee__methaneQuery_activatePump_#t~ret10#1_25| 0) (= ~pumpRunning~0 1))) (= ~head~0.offset 0) (exists ((|v_ULTIMATE.start_test_~tmp___0~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_test_~tmp~0#1_BEFORE_CALL_5| Int)) (and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (not (= |v_ULTIMATE.start_test_~tmp~0#1_BEFORE_CALL_5| 0)) (= 30 (select |#length| 7)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#valid| 9) 1) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___0~0#1_BEFORE_CALL_3| 2147483648)) (= (select |#length| 12) 25) (<= 0 (+ |v_ULTIMATE.start_test_~tmp~0#1_BEFORE_CALL_5| 2147483648)) (= (select |#valid| 11) 1) (= 30 (select |#length| 4)) (= 31 (select |#length| 2)) (not (= |v_ULTIMATE.start_test_~tmp___0~0#1_BEFORE_CALL_3| 0)) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= 30 (select |#length| 13)) (= 30 (select |#length| 10)) (= (select |#valid| 12) 1) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#length| 6) 21) (= (select |#valid| 14) 1) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= 9 (select |#length| 11)) (<= |v_ULTIMATE.start_test_~tmp___0~0#1_BEFORE_CALL_3| 2147483647) (= (select (select |#memory_int| 1) 0) 48) (<= |v_ULTIMATE.start_test_~tmp~0#1_BEFORE_CALL_5| 2147483647) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 1) 1) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select |#valid| 13) 1))) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (exists ((|v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| Int)) (and (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 2147483647) (or (and (<= |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_1| 2147483647) (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_1| 2147483648)) (= 1 ~systemActive~0)) (and (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1| 0)) (= 1 ~systemActive~0))) (<= 0 (+ 2147483648 |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_1|)))) (<= |timeShift___utac_acc__Specification1_spec__1_~tmp~6#1| 1) (<= 2 |old(~waterLevel~0)|) (= |timeShift___utac_acc__Specification1_spec__1_~tmp~6#1| ~methaneLevelCritical~0) (<= 0 ~methaneLevelCritical~0) (= |old(~waterLevel~0)| ~waterLevel~0) (= ~head~0.base 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1|) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-19 04:16:10,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:16:10,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:16:10,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 32 [2023-11-19 04:16:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063426464] [2023-11-19 04:16:10,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:16:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 04:16:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 04:16:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 04:16:10,615 INFO L87 Difference]: Start difference. First operand 220 states and 261 transitions. Second operand has 32 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 9 states have call successors, (18), 7 states have call predecessors, (18), 14 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-19 04:16:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:16,690 INFO L93 Difference]: Finished difference Result 934 states and 1234 transitions. [2023-11-19 04:16:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-19 04:16:16,691 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 9 states have call successors, (18), 7 states have call predecessors, (18), 14 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) Word has length 41 [2023-11-19 04:16:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:16,698 INFO L225 Difference]: With dead ends: 934 [2023-11-19 04:16:16,699 INFO L226 Difference]: Without dead ends: 703 [2023-11-19 04:16:16,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6338 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=2132, Invalid=15690, Unknown=0, NotChecked=0, Total=17822 [2023-11-19 04:16:16,710 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1106 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:16,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 552 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 04:16:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2023-11-19 04:16:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 537. [2023-11-19 04:16:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 357 states have (on average 1.1792717086834734) internal successors, (421), 382 states have internal predecessors, (421), 92 states have call successors, (92), 74 states have call predecessors, (92), 87 states have return successors, (121), 100 states have call predecessors, (121), 92 states have call successors, (121) [2023-11-19 04:16:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 634 transitions. [2023-11-19 04:16:16,795 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 634 transitions. Word has length 41 [2023-11-19 04:16:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:16,796 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 634 transitions. [2023-11-19 04:16:16,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 9 states have call successors, (18), 7 states have call predecessors, (18), 14 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-19 04:16:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 634 transitions. [2023-11-19 04:16:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:16:16,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:16,802 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:16:16,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:17,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:17,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:17,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash 522009207, now seen corresponding path program 1 times [2023-11-19 04:16:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386628455] [2023-11-19 04:16:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:16:17,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386628455] [2023-11-19 04:16:17,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386628455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:17,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334615415] [2023-11-19 04:16:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:17,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:17,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:16:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:17,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:16:17,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:16:17,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:16:17,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334615415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:16:17,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:16:17,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 13 [2023-11-19 04:16:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536811804] [2023-11-19 04:16:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:16:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:16:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:16:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:16:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:16:17,523 INFO L87 Difference]: Start difference. First operand 537 states and 634 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 04:16:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:16:17,624 INFO L93 Difference]: Finished difference Result 1048 states and 1251 transitions. [2023-11-19 04:16:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:16:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 58 [2023-11-19 04:16:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:16:17,630 INFO L225 Difference]: With dead ends: 1048 [2023-11-19 04:16:17,630 INFO L226 Difference]: Without dead ends: 513 [2023-11-19 04:16:17,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:16:17,633 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:16:17,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:16:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-19 04:16:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 489. [2023-11-19 04:16:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 324 states have (on average 1.1388888888888888) internal successors, (369), 346 states have internal predecessors, (369), 84 states have call successors, (84), 67 states have call predecessors, (84), 80 states have return successors, (109), 91 states have call predecessors, (109), 84 states have call successors, (109) [2023-11-19 04:16:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 562 transitions. [2023-11-19 04:16:17,706 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 562 transitions. Word has length 58 [2023-11-19 04:16:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:16:17,707 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 562 transitions. [2023-11-19 04:16:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 04:16:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 562 transitions. [2023-11-19 04:16:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 04:16:17,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:16:17,722 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:16:17,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:16:17,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:17,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:16:17,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:16:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1179489706, now seen corresponding path program 1 times [2023-11-19 04:16:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:16:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801149163] [2023-11-19 04:16:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:16:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:16:18,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:16:18,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801149163] [2023-11-19 04:16:18,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801149163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:16:18,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727736726] [2023-11-19 04:16:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:16:18,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:16:18,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:16:18,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:16:18,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8d6586c-2447-4d32-af6e-48aa7fbe4ca9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:16:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:16:18,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 04:16:18,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:16:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:16:18,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:16:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:16:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727736726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:16:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297813697] [2023-11-19 04:16:19,156 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-11-19 04:16:19,156 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:16:19,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:16:19,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:16:19,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:16:21,259 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 133 for LOIs [2023-11-19 04:16:21,382 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 31 for LOIs [2023-11-19 04:16:21,870 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 6 for LOIs