./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.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_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/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_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/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_23697858-21bb-496d-a3a1-beaccd00a8c8/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 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:25,992 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:26,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:08:26,138 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:26,138 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:26,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:26,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:26,161 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:26,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:26,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:26,164 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:26,164 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:26,165 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:26,166 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:26,166 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:26,167 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:26,168 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:26,168 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:26,169 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:26,170 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:26,170 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:26,171 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:26,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:26,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:26,173 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:26,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:26,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:26,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:26,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:26,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:26,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:26,177 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:26,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:26,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:26,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:26,179 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:26,179 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:26,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:26,180 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:26,181 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:26,181 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:26,182 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:26,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:26,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:26,183 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:26,184 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:26,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:26,184 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_23697858-21bb-496d-a3a1-beaccd00a8c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f3f23173af8ffbfd6ca2d826b937f078be2c112e64596739bc9740bb061a5d2 [2023-11-23 21:08:26,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:26,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:26,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:26,500 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:26,501 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:26,502 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2023-11-23 21:08:29,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:29,815 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:29,816 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c [2023-11-23 21:08:29,832 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/data/0fd947202/7b55947fe9094b7ca2a6e6caf9482c21/FLAG2a9af3100 [2023-11-23 21:08:29,847 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/data/0fd947202/7b55947fe9094b7ca2a6e6caf9482c21 [2023-11-23 21:08:29,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:29,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:29,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:29,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:29,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:29,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:29" (1/1) ... [2023-11-23 21:08:29,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a458090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:29, skipping insertion in model container [2023-11-23 21:08:29,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:29" (1/1) ... [2023-11-23 21:08:29,934 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:30,118 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_23697858-21bb-496d-a3a1-beaccd00a8c8/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2023-11-23 21:08:30,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:30,263 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:30,287 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [49] [2023-11-23 21:08:30,289 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [153] [2023-11-23 21:08:30,289 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification4_spec.i","") [162] [2023-11-23 21:08:30,289 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [190] [2023-11-23 21:08:30,290 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [261] [2023-11-23 21:08:30,290 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [531] [2023-11-23 21:08:30,290 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [897] [2023-11-23 21:08:30,290 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1000] [2023-11-23 21:08:30,314 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_23697858-21bb-496d-a3a1-beaccd00a8c8/sv-benchmarks/c/product-lines/minepump_spec4_product64.cil.c[2897,2910] [2023-11-23 21:08:30,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:30,409 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:30,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30 WrapperNode [2023-11-23 21:08:30,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:30,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:30,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:30,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:30,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,483 INFO L138 Inliner]: procedures = 59, calls = 107, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 244 [2023-11-23 21:08:30,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:30,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:30,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:30,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:30,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:30,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:30,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:30,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:30,536 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (1/1) ... [2023-11-23 21:08:30,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:30,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:30,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:30,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:30,687 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-23 21:08:30,687 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-23 21:08:30,688 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:08:30,688 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:08:30,688 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:08:30,688 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:08:30,688 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:08:30,689 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-23 21:08:30,689 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-23 21:08:30,689 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-23 21:08:30,689 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:08:30,700 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-23 21:08:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-23 21:08:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-23 21:08:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-23 21:08:30,701 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-23 21:08:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-23 21:08:30,702 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-23 21:08:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:30,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:30,822 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:30,824 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:31,136 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:31,262 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:31,263 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:08:31,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:31 BoogieIcfgContainer [2023-11-23 21:08:31,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:31,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:31,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:31,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:31,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:29" (1/3) ... [2023-11-23 21:08:31,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2000b191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:31, skipping insertion in model container [2023-11-23 21:08:31,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:30" (2/3) ... [2023-11-23 21:08:31,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2000b191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:31, skipping insertion in model container [2023-11-23 21:08:31,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:31" (3/3) ... [2023-11-23 21:08:31,278 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product64.cil.c [2023-11-23 21:08:31,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:31,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:31,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:31,354 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;@2416eab6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:31,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 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 21:08:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:08:31,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:31,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:31,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:31,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash 192046741, now seen corresponding path program 1 times [2023-11-23 21:08:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:31,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044229442] [2023-11-23 21:08:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:31,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044229442] [2023-11-23 21:08:31,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044229442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:31,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:31,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:31,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203169962] [2023-11-23 21:08:31,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:08:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:08:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:08:31,641 INFO L87 Difference]: Start difference. First operand has 73 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 56 states have internal predecessors, (65), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:31,737 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-23 21:08:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:08:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 21:08:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:31,750 INFO L225 Difference]: With dead ends: 144 [2023-11-23 21:08:31,750 INFO L226 Difference]: Without dead ends: 68 [2023-11-23 21:08:31,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:08:31,758 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 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 21:08:31,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-23 21:08:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-23 21:08:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 52 states have internal predecessors, (57), 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 21:08:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2023-11-23 21:08:31,805 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 12 [2023-11-23 21:08:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:31,805 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2023-11-23 21:08:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2023-11-23 21:08:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:08:31,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:31,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:08:31,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:31,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1461827520, now seen corresponding path program 1 times [2023-11-23 21:08:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:31,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453863319] [2023-11-23 21:08:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:31,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453863319] [2023-11-23 21:08:31,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453863319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:31,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:31,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267042911] [2023-11-23 21:08:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:31,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:31,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:31,948 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:32,042 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2023-11-23 21:08:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:08:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:32,046 INFO L225 Difference]: With dead ends: 108 [2023-11-23 21:08:32,046 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 21:08:32,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:32,049 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:32,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 110 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 21:08:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-23 21:08:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 47 states have internal predecessors, (51), 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 21:08:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-23 21:08:32,066 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2023-11-23 21:08:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:32,066 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-23 21:08:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-23 21:08:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:08:32,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:32,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:08:32,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:32,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash 189879905, now seen corresponding path program 1 times [2023-11-23 21:08:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997441221] [2023-11-23 21:08:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:32,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997441221] [2023-11-23 21:08:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997441221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:32,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247273849] [2023-11-23 21:08:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:32,198 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:32,359 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2023-11-23 21:08:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 21:08:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:32,362 INFO L225 Difference]: With dead ends: 147 [2023-11-23 21:08:32,364 INFO L226 Difference]: Without dead ends: 89 [2023-11-23 21:08:32,365 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 [2023-11-23 21:08:32,369 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:32,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 137 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-23 21:08:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-11-23 21:08:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 68 states have internal predecessors, (76), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (19), 12 states have call predecessors, (19), 18 states have call successors, (19) [2023-11-23 21:08:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2023-11-23 21:08:32,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 16 [2023-11-23 21:08:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:32,396 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2023-11-23 21:08:32,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2023-11-23 21:08:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:08:32,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:32,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:08:32,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:32,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1356365703, now seen corresponding path program 1 times [2023-11-23 21:08:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:32,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376636436] [2023-11-23 21:08:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:32,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:32,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376636436] [2023-11-23 21:08:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376636436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832215862] [2023-11-23 21:08:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:32,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:32,824 INFO L87 Difference]: Start difference. First operand 86 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:33,028 INFO L93 Difference]: Finished difference Result 263 states and 351 transitions. [2023-11-23 21:08:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:08:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:08:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:33,037 INFO L225 Difference]: With dead ends: 263 [2023-11-23 21:08:33,038 INFO L226 Difference]: Without dead ends: 179 [2023-11-23 21:08:33,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:33,050 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:33,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 252 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-23 21:08:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2023-11-23 21:08:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 131 states have internal predecessors, (150), 28 states have call successors, (28), 22 states have call predecessors, (28), 25 states have return successors, (34), 25 states have call predecessors, (34), 28 states have call successors, (34) [2023-11-23 21:08:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 212 transitions. [2023-11-23 21:08:33,112 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 212 transitions. Word has length 19 [2023-11-23 21:08:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 212 transitions. [2023-11-23 21:08:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 212 transitions. [2023-11-23 21:08:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:08:33,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:33,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:33,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:08:33,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:33,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:33,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2020199840, now seen corresponding path program 1 times [2023-11-23 21:08:33,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:33,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915751889] [2023-11-23 21:08:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:33,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915751889] [2023-11-23 21:08:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915751889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:33,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:08:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713412302] [2023-11-23 21:08:33,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:33,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:08:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:08:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:08:33,456 INFO L87 Difference]: Start difference. First operand 168 states and 212 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:08:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:34,057 INFO L93 Difference]: Finished difference Result 460 states and 603 transitions. [2023-11-23 21:08:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:08:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-23 21:08:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:34,063 INFO L225 Difference]: With dead ends: 460 [2023-11-23 21:08:34,063 INFO L226 Difference]: Without dead ends: 376 [2023-11-23 21:08:34,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:08:34,065 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 202 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:34,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 312 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:08:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-23 21:08:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 334. [2023-11-23 21:08:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 230 states have (on average 1.2826086956521738) internal successors, (295), 259 states have internal predecessors, (295), 53 states have call successors, (53), 43 states have call predecessors, (53), 50 states have return successors, (69), 51 states have call predecessors, (69), 53 states have call successors, (69) [2023-11-23 21:08:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 417 transitions. [2023-11-23 21:08:34,123 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 417 transitions. Word has length 22 [2023-11-23 21:08:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:34,123 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 417 transitions. [2023-11-23 21:08:34,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:08:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 417 transitions. [2023-11-23 21:08:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:08:34,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:34,128 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:08:34,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:08:34,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1036355348, now seen corresponding path program 1 times [2023-11-23 21:08:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102986714] [2023-11-23 21:08:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:34,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:34,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102986714] [2023-11-23 21:08:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102986714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:34,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:34,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982231668] [2023-11-23 21:08:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:34,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:34,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:34,187 INFO L87 Difference]: Start difference. First operand 334 states and 417 transitions. Second operand has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 21:08:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:34,347 INFO L93 Difference]: Finished difference Result 675 states and 840 transitions. [2023-11-23 21:08:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:08:34,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2023-11-23 21:08:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:34,354 INFO L225 Difference]: With dead ends: 675 [2023-11-23 21:08:34,354 INFO L226 Difference]: Without dead ends: 343 [2023-11-23 21:08:34,355 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 21:08:34,357 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 101 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 134 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 21:08:34,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 134 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-23 21:08:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 318. [2023-11-23 21:08:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 220 states have (on average 1.259090909090909) internal successors, (277), 246 states have internal predecessors, (277), 48 states have call successors, (48), 42 states have call predecessors, (48), 49 states have return successors, (57), 49 states have call predecessors, (57), 48 states have call successors, (57) [2023-11-23 21:08:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 382 transitions. [2023-11-23 21:08:34,416 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 382 transitions. Word has length 56 [2023-11-23 21:08:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:34,417 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 382 transitions. [2023-11-23 21:08:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.0) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 21:08:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 382 transitions. [2023-11-23 21:08:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:08:34,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:34,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:34,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:08:34,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:34,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -354438140, now seen corresponding path program 1 times [2023-11-23 21:08:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:34,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406476847] [2023-11-23 21:08:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:34,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:34,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406476847] [2023-11-23 21:08:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406476847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:34,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:34,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:08:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434080026] [2023-11-23 21:08:34,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:34,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:08:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:08:34,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:08:34,863 INFO L87 Difference]: Start difference. First operand 318 states and 382 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:08:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:35,293 INFO L93 Difference]: Finished difference Result 482 states and 597 transitions. [2023-11-23 21:08:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:08:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2023-11-23 21:08:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:35,296 INFO L225 Difference]: With dead ends: 482 [2023-11-23 21:08:35,297 INFO L226 Difference]: Without dead ends: 311 [2023-11-23 21:08:35,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:08:35,298 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:35,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 210 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:08:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-23 21:08:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2023-11-23 21:08:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 174 states have (on average 1.2758620689655173) internal successors, (222), 196 states have internal predecessors, (222), 39 states have call successors, (39), 34 states have call predecessors, (39), 40 states have return successors, (47), 39 states have call predecessors, (47), 39 states have call successors, (47) [2023-11-23 21:08:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 308 transitions. [2023-11-23 21:08:35,337 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 308 transitions. Word has length 53 [2023-11-23 21:08:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:35,337 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 308 transitions. [2023-11-23 21:08:35,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:08:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 308 transitions. [2023-11-23 21:08:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 21:08:35,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:35,339 INFO L195 NwaCegarLoop]: trace histogram [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 21:08:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:08:35,339 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:35,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1721426352, now seen corresponding path program 1 times [2023-11-23 21:08:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275749409] [2023-11-23 21:08:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:35,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:08:35,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275749409] [2023-11-23 21:08:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275749409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:35,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:08:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634510439] [2023-11-23 21:08:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:35,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:08:35,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:08:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:08:35,486 INFO L87 Difference]: Start difference. First operand 254 states and 308 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:08:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:35,691 INFO L93 Difference]: Finished difference Result 608 states and 756 transitions. [2023-11-23 21:08:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:08:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2023-11-23 21:08:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:35,695 INFO L225 Difference]: With dead ends: 608 [2023-11-23 21:08:35,696 INFO L226 Difference]: Without dead ends: 501 [2023-11-23 21:08:35,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:08:35,697 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 274 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-11-23 21:08:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 479. [2023-11-23 21:08:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 337 states have (on average 1.281899109792285) internal successors, (432), 371 states have internal predecessors, (432), 69 states have call successors, (69), 60 states have call predecessors, (69), 72 states have return successors, (85), 70 states have call predecessors, (85), 69 states have call successors, (85) [2023-11-23 21:08:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 586 transitions. [2023-11-23 21:08:35,786 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 586 transitions. Word has length 60 [2023-11-23 21:08:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:35,786 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 586 transitions. [2023-11-23 21:08:35,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:08:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 586 transitions. [2023-11-23 21:08:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:08:35,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:35,789 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:08:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:08:35,790 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:35,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:35,790 INFO L85 PathProgramCache]: Analyzing trace with hash -309858012, now seen corresponding path program 1 times [2023-11-23 21:08:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314617140] [2023-11-23 21:08:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:35,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:08:35,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314617140] [2023-11-23 21:08:35,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314617140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:35,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121575659] [2023-11-23 21:08:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:35,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:35,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:36,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:08:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:36,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:08:36,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:36,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:08:36,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121575659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:08:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514924589] [2023-11-23 21:08:37,016 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-23 21:08:37,016 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:08:37,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:08:37,027 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:08:37,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:08:39,889 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 145 for LOIs [2023-11-23 21:08:40,063 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs [2023-11-23 21:08:40,200 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-11-23 21:08:40,274 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 30 for LOIs [2023-11-23 21:08:40,425 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 31 for LOIs [2023-11-23 21:08:40,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:08:47,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6736#(and (<= 1 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (exists ((|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_14| Int)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_14| 2147483648)) (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_14| 0)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_14| 2147483647))) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (= |old(~waterLevel~0)| 0) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-23 21:08:47,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:08:47,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:08:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 25 [2023-11-23 21:08:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764802165] [2023-11-23 21:08:47,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:08:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:08:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:08:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 21:08:47,580 INFO L87 Difference]: Start difference. First operand 479 states and 586 transitions. Second operand has 25 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-23 21:08:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:54,956 INFO L93 Difference]: Finished difference Result 2598 states and 3467 transitions. [2023-11-23 21:08:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-11-23 21:08:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 61 [2023-11-23 21:08:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:54,973 INFO L225 Difference]: With dead ends: 2598 [2023-11-23 21:08:54,973 INFO L226 Difference]: Without dead ends: 2223 [2023-11-23 21:08:54,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19117 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5569, Invalid=41737, Unknown=0, NotChecked=0, Total=47306 [2023-11-23 21:08:54,998 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1759 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 4103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:54,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 1377 Invalid, 4103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 2930 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-23 21:08:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2023-11-23 21:08:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1738. [2023-11-23 21:08:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1249 states have (on average 1.2978382706164933) internal successors, (1621), 1325 states have internal predecessors, (1621), 225 states have call successors, (225), 217 states have call predecessors, (225), 263 states have return successors, (331), 257 states have call predecessors, (331), 225 states have call successors, (331) [2023-11-23 21:08:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2177 transitions. [2023-11-23 21:08:55,226 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2177 transitions. Word has length 61 [2023-11-23 21:08:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:55,229 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2177 transitions. [2023-11-23 21:08:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 11 states have call successors, (19), 8 states have call predecessors, (19), 8 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-23 21:08:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2177 transitions. [2023-11-23 21:08:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 21:08:55,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:55,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:55,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:55,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:55,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:55,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1945175592, now seen corresponding path program 1 times [2023-11-23 21:08:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:55,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540594368] [2023-11-23 21:08:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:08:55,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540594368] [2023-11-23 21:08:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540594368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777807089] [2023-11-23 21:08:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:55,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:55,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:55,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:08:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:55,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:08:55,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:08:56,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:56,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777807089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:56,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:08:56,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 13 [2023-11-23 21:08:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492231038] [2023-11-23 21:08:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:08:56,015 INFO L87 Difference]: Start difference. First operand 1738 states and 2177 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:08:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:56,199 INFO L93 Difference]: Finished difference Result 2907 states and 3754 transitions. [2023-11-23 21:08:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2023-11-23 21:08:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:56,212 INFO L225 Difference]: With dead ends: 2907 [2023-11-23 21:08:56,212 INFO L226 Difference]: Without dead ends: 1640 [2023-11-23 21:08:56,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:08:56,218 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:56,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 162 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:08:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2023-11-23 21:08:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1556. [2023-11-23 21:08:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1115 states have (on average 1.2582959641255604) internal successors, (1403), 1186 states have internal predecessors, (1403), 209 states have call successors, (209), 203 states have call predecessors, (209), 231 states have return successors, (278), 227 states have call predecessors, (278), 209 states have call successors, (278) [2023-11-23 21:08:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 1890 transitions. [2023-11-23 21:08:56,418 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 1890 transitions. Word has length 80 [2023-11-23 21:08:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:56,419 INFO L495 AbstractCegarLoop]: Abstraction has 1556 states and 1890 transitions. [2023-11-23 21:08:56,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-23 21:08:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 1890 transitions. [2023-11-23 21:08:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:08:56,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:56,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-11-23 21:08:56,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:08:56,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:56,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:56,651 INFO L85 PathProgramCache]: Analyzing trace with hash 13759979, now seen corresponding path program 1 times [2023-11-23 21:08:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793428234] [2023-11-23 21:08:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:08:57,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793428234] [2023-11-23 21:08:57,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793428234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:57,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622029405] [2023-11-23 21:08:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:57,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:57,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:57,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:08:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:57,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:08:57,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:08:57,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:08:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622029405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:08:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334820867] [2023-11-23 21:08:58,240 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-11-23 21:08:58,240 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:08:58,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:08:58,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:08:58,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:01,370 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 10 for LOIs [2023-11-23 21:09:01,374 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2023-11-23 21:09:01,557 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 30 for LOIs [2023-11-23 21:09:01,670 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 43 for LOIs [2023-11-23 21:09:01,917 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 40 for LOIs [2023-11-23 21:09:01,945 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 16 for LOIs [2023-11-23 21:09:01,949 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:05,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19393#(and (= |timeShift___utac_acc__Specification4_spec__1_~tmp~1#1| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (= |timeShift_getWaterLevel_#res#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~waterLevel~0 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)))' at error location [2023-11-23 21:09:05,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:05,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:05,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 23 [2023-11-23 21:09:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4689225] [2023-11-23 21:09:05,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:05,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 21:09:05,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 21:09:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3812, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 21:09:05,813 INFO L87 Difference]: Start difference. First operand 1556 states and 1890 transitions. Second operand has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 7 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-23 21:09:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:09,501 INFO L93 Difference]: Finished difference Result 4967 states and 6310 transitions. [2023-11-23 21:09:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-23 21:09:09,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 7 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 88 [2023-11-23 21:09:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:09,527 INFO L225 Difference]: With dead ends: 4967 [2023-11-23 21:09:09,527 INFO L226 Difference]: Without dead ends: 3515 [2023-11-23 21:09:09,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 250 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6757 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1693, Invalid=15863, Unknown=0, NotChecked=0, Total=17556 [2023-11-23 21:09:09,538 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 849 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:09,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 966 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:09:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2023-11-23 21:09:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1989. [2023-11-23 21:09:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1434 states have (on average 1.2405857740585775) internal successors, (1779), 1518 states have internal predecessors, (1779), 275 states have call successors, (275), 266 states have call predecessors, (275), 279 states have return successors, (327), 277 states have call predecessors, (327), 275 states have call successors, (327) [2023-11-23 21:09:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2381 transitions. [2023-11-23 21:09:09,801 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2381 transitions. Word has length 88 [2023-11-23 21:09:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:09,802 INFO L495 AbstractCegarLoop]: Abstraction has 1989 states and 2381 transitions. [2023-11-23 21:09:09,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 7 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-23 21:09:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2381 transitions. [2023-11-23 21:09:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-23 21:09:09,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:09,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:09,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:10,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:09:10,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:10,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash 374125865, now seen corresponding path program 1 times [2023-11-23 21:09:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:10,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320441158] [2023-11-23 21:09:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:09:10,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320441158] [2023-11-23 21:09:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320441158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422617788] [2023-11-23 21:09:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:10,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:10,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23697858-21bb-496d-a3a1-beaccd00a8c8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:09:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:10,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:09:10,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 63 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:09:11,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 42 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 21:09:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422617788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:11,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005066490] [2023-11-23 21:09:11,905 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-23 21:09:11,906 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:11,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:11,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:11,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:13,909 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 145 for LOIs [2023-11-23 21:09:13,989 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 32 for LOIs