./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bcd24ea8f621c8db79e853f5aaf064ffcae573e6c1e9f03eb1f84bb0c15fc3c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:40,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:40,312 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:40,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:40,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:40,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:40,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:40,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:40,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:40,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:40,391 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:40,391 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:40,392 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:40,393 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:40,394 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:40,395 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:40,395 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:40,396 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:40,397 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:40,398 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:40,398 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:40,399 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:40,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:40,401 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:40,402 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:40,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:40,403 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:40,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:40,404 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:40,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:40,406 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:40,406 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:40,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:40,407 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:40,409 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:40,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:40,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:40,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:40,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:40,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:40,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:40,414 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:40,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:40,415 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:40,416 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:40,416 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:40,416 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:40,417 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_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bcd24ea8f621c8db79e853f5aaf064ffcae573e6c1e9f03eb1f84bb0c15fc3c [2023-11-23 20:33:40,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:40,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:40,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:40,797 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:40,798 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:40,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c [2023-11-23 20:33:44,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:45,166 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:45,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c [2023-11-23 20:33:45,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/data/1dbeed41d/8ba5d0da8c384ab3a07619b403514521/FLAGf8e92ca5c [2023-11-23 20:33:45,224 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/data/1dbeed41d/8ba5d0da8c384ab3a07619b403514521 [2023-11-23 20:33:45,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:45,239 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:45,241 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:45,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:45,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:45,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:45,252 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d46d692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45, skipping insertion in model container [2023-11-23 20:33:45,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:45,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:45,621 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_60f56cd9-a0d4-42c4-bab1-c392e37e622e/sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c[8146,8159] [2023-11-23 20:33:45,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:45,818 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:45,831 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [49] [2023-11-23 20:33:45,834 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [160] [2023-11-23 20:33:45,835 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [418] [2023-11-23 20:33:45,835 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [488] [2023-11-23 20:33:45,836 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [526] [2023-11-23 20:33:45,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification5_spec.i","") [535] [2023-11-23 20:33:45,838 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [584] [2023-11-23 20:33:45,838 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [950] [2023-11-23 20:33:45,897 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_60f56cd9-a0d4-42c4-bab1-c392e37e622e/sv-benchmarks/c/product-lines/minepump_spec5_product56.cil.c[8146,8159] [2023-11-23 20:33:45,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:45,978 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:45,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45 WrapperNode [2023-11-23 20:33:45,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:45,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:45,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:45,982 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:45,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,089 INFO L138 Inliner]: procedures = 60, calls = 108, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 241 [2023-11-23 20:33:46,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:46,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:46,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:46,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:46,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,123 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:46,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:46,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:46,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:46,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (1/1) ... [2023-11-23 20:33:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:46,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:46,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 20:33:46,272 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 20:33:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:33:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:33:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:33:46,273 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:33:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:33:46,275 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 20:33:46,276 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 20:33:46,277 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 20:33:46,277 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 20:33:46,278 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-23 20:33:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2023-11-23 20:33:46,280 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2023-11-23 20:33:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 20:33:46,282 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 20:33:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 20:33:46,286 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 20:33:46,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:46,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:46,459 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:46,463 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:46,837 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:46,985 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:46,985 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:33:46,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:46 BoogieIcfgContainer [2023-11-23 20:33:46,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:46,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:46,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:46,997 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:46,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:45" (1/3) ... [2023-11-23 20:33:46,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5e6b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:46, skipping insertion in model container [2023-11-23 20:33:46,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:45" (2/3) ... [2023-11-23 20:33:46,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5e6b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:46, skipping insertion in model container [2023-11-23 20:33:47,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:46" (3/3) ... [2023-11-23 20:33:47,002 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product56.cil.c [2023-11-23 20:33:47,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:47,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:47,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:47,110 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;@510de062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:47,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-23 20:33:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:33:47,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:47,133 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] [2023-11-23 20:33:47,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:47,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:47,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1727210022, now seen corresponding path program 1 times [2023-11-23 20:33:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785316972] [2023-11-23 20:33:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:47,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785316972] [2023-11-23 20:33:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785316972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:47,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:47,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137457314] [2023-11-23 20:33:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:47,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:33:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:33:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:33:47,577 INFO L87 Difference]: Start difference. First operand has 74 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:47,697 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2023-11-23 20:33:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:33:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-23 20:33:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:47,714 INFO L225 Difference]: With dead ends: 146 [2023-11-23 20:33:47,715 INFO L226 Difference]: Without dead ends: 69 [2023-11-23 20:33:47,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:33:47,725 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:47,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-23 20:33:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-23 20:33:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.372093023255814) internal successors, (59), 53 states have internal predecessors, (59), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 20:33:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2023-11-23 20:33:47,788 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 21 [2023-11-23 20:33:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:47,789 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2023-11-23 20:33:47,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2023-11-23 20:33:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 20:33:47,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:47,794 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] [2023-11-23 20:33:47,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:47,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:47,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1602639805, now seen corresponding path program 1 times [2023-11-23 20:33:47,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:47,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753356403] [2023-11-23 20:33:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:47,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:47,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753356403] [2023-11-23 20:33:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753356403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:47,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:47,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456305148] [2023-11-23 20:33:47,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:47,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:47,958 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:48,021 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2023-11-23 20:33:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-23 20:33:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:48,025 INFO L225 Difference]: With dead ends: 110 [2023-11-23 20:33:48,025 INFO L226 Difference]: Without dead ends: 61 [2023-11-23 20:33:48,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:48,029 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:48,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 114 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-23 20:33:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-23 20:33:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.394736842105263) internal successors, (53), 48 states have internal predecessors, (53), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 20:33:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-11-23 20:33:48,048 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 22 [2023-11-23 20:33:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:48,049 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-11-23 20:33:48,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-11-23 20:33:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:48,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:48,053 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] [2023-11-23 20:33:48,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:33:48,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:48,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1984871609, now seen corresponding path program 1 times [2023-11-23 20:33:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999819295] [2023-11-23 20:33:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:48,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:48,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999819295] [2023-11-23 20:33:48,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999819295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:48,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:48,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:48,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352697934] [2023-11-23 20:33:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:48,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:48,271 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:48,393 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2023-11-23 20:33:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-23 20:33:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:48,398 INFO L225 Difference]: With dead ends: 179 [2023-11-23 20:33:48,399 INFO L226 Difference]: Without dead ends: 120 [2023-11-23 20:33:48,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:48,402 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 73 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:48,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 140 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-23 20:33:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2023-11-23 20:33:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 91 states have internal predecessors, (101), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 17 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-23 20:33:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-11-23 20:33:48,441 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 25 [2023-11-23 20:33:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:48,442 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-11-23 20:33:48,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-11-23 20:33:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 20:33:48,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:48,446 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] [2023-11-23 20:33:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:33:48,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:48,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -827608469, now seen corresponding path program 1 times [2023-11-23 20:33:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:48,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515890866] [2023-11-23 20:33:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:33:48,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:48,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515890866] [2023-11-23 20:33:48,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515890866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:48,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:48,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:48,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223050711] [2023-11-23 20:33:48,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:48,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:48,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:48,707 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:49,072 INFO L93 Difference]: Finished difference Result 318 states and 437 transitions. [2023-11-23 20:33:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:33:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-23 20:33:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:49,084 INFO L225 Difference]: With dead ends: 318 [2023-11-23 20:33:49,084 INFO L226 Difference]: Without dead ends: 203 [2023-11-23 20:33:49,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:49,098 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 41 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:49,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 296 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:33:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-23 20:33:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2023-11-23 20:33:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.310077519379845) internal successors, (169), 146 states have internal predecessors, (169), 38 states have call successors, (38), 30 states have call predecessors, (38), 30 states have return successors, (50), 33 states have call predecessors, (50), 38 states have call successors, (50) [2023-11-23 20:33:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2023-11-23 20:33:49,193 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 28 [2023-11-23 20:33:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:49,194 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2023-11-23 20:33:49,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:33:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2023-11-23 20:33:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 20:33:49,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:49,203 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] [2023-11-23 20:33:49,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:33:49,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:49,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:49,205 INFO L85 PathProgramCache]: Analyzing trace with hash 428357752, now seen corresponding path program 1 times [2023-11-23 20:33:49,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:49,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701899317] [2023-11-23 20:33:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:49,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:49,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:49,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701899317] [2023-11-23 20:33:49,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701899317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:49,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:49,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:33:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155623408] [2023-11-23 20:33:49,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:49,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:49,853 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:33:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:50,322 INFO L93 Difference]: Finished difference Result 592 states and 764 transitions. [2023-11-23 20:33:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:33:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2023-11-23 20:33:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:50,334 INFO L225 Difference]: With dead ends: 592 [2023-11-23 20:33:50,334 INFO L226 Difference]: Without dead ends: 396 [2023-11-23 20:33:50,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:33:50,342 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 186 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:50,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 361 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:33:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-23 20:33:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 384. [2023-11-23 20:33:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 251 states have (on average 1.2868525896414342) internal successors, (323), 279 states have internal predecessors, (323), 71 states have call successors, (71), 59 states have call predecessors, (71), 61 states have return successors, (95), 64 states have call predecessors, (95), 71 states have call successors, (95) [2023-11-23 20:33:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 489 transitions. [2023-11-23 20:33:50,421 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 489 transitions. Word has length 38 [2023-11-23 20:33:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:50,422 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 489 transitions. [2023-11-23 20:33:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:33:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 489 transitions. [2023-11-23 20:33:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 20:33:50,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:50,425 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] [2023-11-23 20:33:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:33:50,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:50,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1015378397, now seen corresponding path program 1 times [2023-11-23 20:33:50,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:50,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425990485] [2023-11-23 20:33:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:50,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425990485] [2023-11-23 20:33:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425990485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:33:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062556685] [2023-11-23 20:33:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:50,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:50,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:50,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:50,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:50,820 INFO L87 Difference]: Start difference. First operand 384 states and 489 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 20:33:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:51,503 INFO L93 Difference]: Finished difference Result 886 states and 1145 transitions. [2023-11-23 20:33:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 20:33:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2023-11-23 20:33:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:51,512 INFO L225 Difference]: With dead ends: 886 [2023-11-23 20:33:51,512 INFO L226 Difference]: Without dead ends: 616 [2023-11-23 20:33:51,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-23 20:33:51,517 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 268 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:51,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 244 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:33:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-11-23 20:33:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 566. [2023-11-23 20:33:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 376 states have (on average 1.2792553191489362) internal successors, (481), 416 states have internal predecessors, (481), 100 states have call successors, (100), 76 states have call predecessors, (100), 89 states have return successors, (139), 99 states have call predecessors, (139), 100 states have call successors, (139) [2023-11-23 20:33:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 720 transitions. [2023-11-23 20:33:51,635 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 720 transitions. Word has length 41 [2023-11-23 20:33:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:51,636 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 720 transitions. [2023-11-23 20:33:51,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 20:33:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 720 transitions. [2023-11-23 20:33:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 20:33:51,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:51,641 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 20:33:51,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:33:51,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:51,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2038326735, now seen corresponding path program 1 times [2023-11-23 20:33:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975794974] [2023-11-23 20:33:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:33:51,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975794974] [2023-11-23 20:33:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975794974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:51,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:33:51,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944648421] [2023-11-23 20:33:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:51,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:51,765 INFO L87 Difference]: Start difference. First operand 566 states and 720 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:51,959 INFO L93 Difference]: Finished difference Result 943 states and 1198 transitions. [2023-11-23 20:33:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:33:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2023-11-23 20:33:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:51,964 INFO L225 Difference]: With dead ends: 943 [2023-11-23 20:33:51,965 INFO L226 Difference]: Without dead ends: 379 [2023-11-23 20:33:51,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:51,971 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 104 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:51,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-23 20:33:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 373. [2023-11-23 20:33:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 250 states have (on average 1.26) internal successors, (315), 277 states have internal predecessors, (315), 65 states have call successors, (65), 51 states have call predecessors, (65), 57 states have return successors, (84), 64 states have call predecessors, (84), 65 states have call successors, (84) [2023-11-23 20:33:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 464 transitions. [2023-11-23 20:33:52,034 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 464 transitions. Word has length 63 [2023-11-23 20:33:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:52,034 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 464 transitions. [2023-11-23 20:33:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 464 transitions. [2023-11-23 20:33:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 20:33:52,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:52,039 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:52,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:33:52,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:52,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1036088182, now seen corresponding path program 1 times [2023-11-23 20:33:52,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:52,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078497520] [2023-11-23 20:33:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:33:52,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078497520] [2023-11-23 20:33:52,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078497520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:52,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44482398] [2023-11-23 20:33:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:52,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f56cd9-a0d4-42c4-bab1-c392e37e622e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:52,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:33:52,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:52,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:33:53,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44482398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:53,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957917146] [2023-11-23 20:33:53,046 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-11-23 20:33:53,046 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:53,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:53,059 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:53,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:06,060 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 28 for LOIs [2023-11-23 20:34:06,076 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 156 for LOIs [2023-11-23 20:34:12,009 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 155 for LOIs [2023-11-23 20:34:13,009 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 146 for LOIs [2023-11-23 20:34:13,580 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 170 for LOIs [2023-11-23 20:34:13,852 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:34,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7259#(and (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 1) (<= 2 ~waterLevel~0) (<= |old(~pumpRunning~0)| 2147483647) (= 1 ~systemActive~0) (<= 2 |old(~waterLevel~0)|) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (or (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (= |old(~pumpRunning~0)| 0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|)) (and (= ~waterLevel~0 |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (= |timeShift_isMethaneAlarm_#res#1| 0) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| 2)) (= |timeShift_isMethaneLevelCritical_#res#1| 0) (= |timeShift___utac_acc__Specification5_spec__3_~tmp~6#1| |timeShift_getWaterLevel_#res#1|))) (= ~switchedOnBeforeTS~0 0) (= ~pumpRunning~0 1))' at error location [2023-11-23 20:34:34,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:34,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:34,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-11-23 20:34:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274031866] [2023-11-23 20:34:34,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 20:34:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 20:34:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 20:34:34,150 INFO L87 Difference]: Start difference. First operand 373 states and 464 transitions. Second operand has 14 states, 11 states have (on average 8.090909090909092) internal successors, (89), 13 states have internal predecessors, (89), 8 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20)